Patent Application
20220053762
The invention is in the technical field of crop protection products that can be used to counter unwanted plant growth on non-crop land, for preparation for seeding or in plant crops, and comprise a combination of at least two herbicides as herbicidally compounds, wherein the compositions comprise herbicidally active compounds (A) and (B), in which (A) represents one or more compounds of the general formula (I) or agrochemically compatible salts thereof [herbicides (A) or component (A)] and (B) represents one or more herbicides (component B).
Compounds from the structure class of the 3-phenylisoxazoline-5-carboxamides are known as herbicides (see, for example, WO2012130798 A). The compounds are effective against a broad spectrum of harmful plants when applied by the pre-emergence method or else by the post-emergence method, with the possibility of non-selective use for control of unwanted plant growth or selective use in plant crops.
The efficacy of these herbicides against harmful plants is at a high level, but generally depends on the application rate, the form of the respective preparation, the spectrum of harmful plants, the harmful plants to be controlled in each case, the climate and soil conditions, etc. A further criterion is the duration of action or the rate of degradation of the herbicide. Also to be taken into account are, if appropriate, changes in the susceptibility of harmful plants which may occur on prolonged use of the herbicides or in a geographically restricted manner. The compensation of losses in action in the case of individual plants by increasing application rates of the herbicides is only possible to a certain degree, for example because such a procedure often worsens the selectivity of the herbicides or because the action is not improved, even when applying higher rates. There is generally need for methods of achieving herbicidal action with a lower application rate of active compounds. A lower application rate not only reduces the amount of an active compound required for the application but generally also reduces the amount of formulation auxiliaries needed. Both reduce the economic expenditure and improve the environmental compatibility of the herbicide treatment.
One way of improving the application profile of a herbicide may be to combine the active compound with one or more other active compounds which contribute the desired additional properties. However, in the combined application of a plurality of active compounds, there are frequently phenomena of physical and biological incompatibility, for example lack of stability in a coformulation, decomposition of an active compound and/or antagonism of the active compounds. What is desired, however, are combinations of active compounds having a favourable activity profile, high stability and ideally an unexpected synergistically enhanced activity which allows the application rate to be reduced compared to the individual application of the active compounds to be combined.
It is an object of the present invention to provide alternative or advantageous herbicidal compositions that have a good profile of biological use and have as many as possible of the abovementioned desirable favourable properties.
It has now been found that, surprisingly, this object can be achieved by using a composition comprising herbicidally active compounds (A) and (B), wherein (A) represents one or more compounds of the general formula (I) or agrochemically compatible salts thereof [component (A)] and (B) represents one or more herbicides [component (B)] selected from the group of the herbicidal active compounds (B1) to (B11). The compositions according to the invention interact in a particularly favourable manner, for example when they are used to control unwanted plant growth in crop plants such as wheat (hard and soft wheat), maize, soya, sugarbeet, sugarcane, cotton, rice, beans (for example green beans and broad beans), flax, barley, oats, rye, triticale, potato and milletsorghum, non-crop land, pastureland and areas of grasslawn and plantation crops.
The present invention thus provides compositions comprising herbicidally active compounds (A) and (B), where (A) represents one or more compounds of the general formula (I) or agrochemically compatible salts thereof [component (A)],
in which
where the arrow in each case denotes a bond to the group C═O of the formula (I);
The common name of the herbicides listed above is supplemented by the “CAS RN” (Chemical Abstracts Service Registry Number) (“CAS” for short) between parentheses. The CAS RN is a widely used reference number that enables unambiguous assignment of the substances in question since the “CAS RN” distinguishes inter alia between isomers, including stereoisomers, and salts and esters. For active compounds that exist in various forms, the name of the neutral compound is given in each case in the above list. The CAS given between parentheses are directed to these and to all further known forms of the active compound. Only the neutral compound is mentioned hereinafter, and hence encompasses all existing forms as listed, unless a specific form of the active compound is relevant in a particular context, for example in table examples below for biological efficacy.
The compositions according to the invention may contain further components, for example other active compounds to counter harmful organisms such as harmful plants, plant-damaging animals or plant-damaging fungi, especially active compounds from the group of the herbicides, fungicides, insecticides, acaricides, nematicides and miticides, and related substances, or else other kinds of active compounds for crop protection (e.g. resistance inductors), plant growth regulators, and/or additions and/or formulation auxiliaries that are customary in crop protection. The components may be formulated together here (ready-to-use formulation) and employed as such, or they may be formulated separately and employed together, for example in a tank mix or in sequential application.
The individual herbicidal active compounds of the general formula (I) present as component (A) are also referred to hereinafter as compounds (A), active compounds (A), components (A) or herbicides (A). Correspondingly, the individual herbicidal active compounds present as component (B) are also referred to hereinafter as compounds (B), active compounds (B), components (B) or herbicides (B).
An advantageous property of the inventive combination of herbicides (A) and (B) is found to be that active compounds (A) and (B) are compatible with one another, meaning that they can be employed together without occurrence of significant chemical incompatibility between the active compounds (A) and/or (B) that leads to destruction of one or more active compounds. This avoids any reduction in the active compound content in formulations or spray liquors. The favourable compatibility also extends to the biological properties of the active compounds on combined use. For instance, antagonistic effects are generally not observed in the case of the control of harmful plants with the active compound combinations according to the invention. The active compounds (A) and (B) are thus particularly suitable for employment together with or in addition to further active compounds for crop protection or agrochemicals. The combined application enabled permits the utilization of advantageous effects, for example the broadening of the spectrum of the harmful plants to be controlled on application, or the reduction of the application rate of the individual herbicides (A) or (B) compared to the respective application rate of the herbicide in question in the case of individual application. It is thus possible to influence the degradation characteristics of the active compounds and to achieve more favourable conditions for the subsequent growing of crop plants. A further advantage is considered to be that the development of resistances of the harmful plants to the active compounds can often be significantly reduced or avoided through the combination of active compounds having different mechanisms of action.
More particularly, superadditive (=synergistic) effects surprisingly occur in the case of the combined use of the active compounds (A) and (B) for a greater number of economically important harmful plants. Here, the activity in the combination is higher than the expected sum of the activities of the individual herbicides employed. The synergistic effects allow the application rate to be reduced further, a broader spectrum of broad-leaved weeds and weed grasses to be controlled, a more rapid onset of the herbicidal action, longer persistence, better control of the harmful plants with only one or a few applications and extension of the application period possible. To some extent, by using the compositions, the amount of harmful ingredients, such as nitrogen or oleic acid, and their introduction into the soil are likewise reduced.
Said properties and advantages are desired in practical weed control in order to keep agricultural crops clear of unwanted competing plants and hence to ensure and/or increase the yields in terms of quality and quantity. The novel combinations markedly exceed the technical state of the art with a view to the properties described.
The synergistic effects are observed in the case of joint deployment of the active compounds (A) and
(B), but can also frequently occur in the case of offset application (splitting). It is also possible to apply the herbicides (A) or (B) or the herbicidal composition (A) and (B) in multiple portions (sequential application). For example, one or more pre-emergence applications may be followed by a post-emergence application, or an early post-emergence application may be followed by a moderately late or late post-emergence application. Preference is given to the simultaneous or immediately successive application of the active compounds of the respective combination, if appropriate in several portions. But offset application of the individual active compounds of a combination is also possible, and may be advantageous in the individual case. It is also possible to integrate other crop protection agents into the system for application, for example the other active compounds mentioned (other herbicides, fungicides, insecticides, acaricides etc.) and/or various auxiliaries, adjuvants and/or applications of fertilizer.
Application by the pre-emergence method and by the post-emergence method, according to the context in which the terms are used, is respectively understood to mean the application of the active compounds before and after the visible appearance of the harmful plants above the ground, or understood to mean the use of the active compounds against the harmful plants before emergence of the crop plants and after emergence of the crop plants.
In the formula (I) for compounds of the herbicidal active compounds (A) and all the formulae that follow, the following definitions are applicable:
Alkyl means saturated straight-chain or branched hydrocarbyl radicals having the number of carbon atoms specified in each case, e.g. C1-C6-alkyl such as methyl, ethyl, propyl, 1-methylethyl, butyl, 1-methylpropyl, 2-methylpropyl, 1,1-dimethylethyl, pentyl, 1-methylbutyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, 1-ethylpropyl, hexyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethyl-1-methylpropyl and 1-ethyl-2-methylpropyl.
Halogen-substituted alkyl means straight-chain or branched alkyl groups where some or all of the hydrogen atoms in these groups may be replaced by halogen atoms, e.g. C1-C2-haloalkyl such as chloromethyl, bromomethyl, dichloromethyl, trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl, chlorofluoromethyl, dichlorofluoromethyl, chlorodifluoromethyl, 1-chloroethyl, 1-bromoethyl, 1-fluoroethyl, 2-fluoroethyl, 2,2-difluoroethyl, 2,2,2-trifluoroethyl, 2-chloro-2-fluoroethyl, 2-chloro-2-difluoroethyl, 2,2-dichloro-2-fluoroethyl, 2,2,2-trichloroethyl, pentafluoroethyl and 1,1,1-trifluoroprop-2-yl.
Alkenyl means unsaturated straight-chain or branched hydrocarbyl radicals having the number of carbon atoms stated in each case and one double bond in any position, for example C2-C6-alkenyl such as ethenyl, 1-propenyl, 2-propenyl, 1-methylethenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-methyl-1-propenyl, 2-methyl-1-propenyl, 1-methyl-2-propenyl, 2-methyl-2-propenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-methyl-1-butenyl, 2-methyl-1-butenyl, 3-methyl-1-butenyl, 1-methyl-2-butenyl, 2-methyl-2-butenyl, 3-methyl-2-butenyl, 1-methyl-3-butenyl, 2-methyl-3-butenyl, 3-methyl-3-butenyl, 1,1-dimethyl-2-propenyl, 1,2-dimethyl-1-propenyl, 1,2-dimethyl-2-propenyl, 1-ethyl-1-propenyl, 1-ethyl-2-propenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, 5-hexenyl, 1-methyl-1-pentenyl, 2-methyl-1-pentenyl, 3-methyl-1-pentenyl, 4-methyl-1-pentenyl, 1-methyl-2-pentenyl, 2-methyl-2-pentenyl, 3-methyl-2-pentenyl, 4-methyl-2-pentenyl, 1-methyl-3-pentenyl, 2-methyl-3-pentenyl, 3-methyl-3-pentenyl, 4-methyl-3-pentenyl, 1-methyl-4-pentenyl, 2-methyl-4-pentenyl, 3-methyl-4-pentenyl, 4-methyl-4-pentenyl, 1,1-dimethyl-2-butenyl, 1,1-dimethyl-3-butenyl, 1,2-dimethyl-1-butenyl, 1,2-dimethyl-2-butenyl, 1,2-dimethyl-3-butenyl, 1,3-dimethyl-1-butenyl, 1,3-dimethyl-2-butenyl, 1,3-dimethyl-3-butenyl, 2,2-dimethyl-3-butenyl, 2,3-dimethyl-1-butenyl, 2,3-dimethyl-2-butenyl, 2,3-dimethyl-3-butenyl, 3,3-dimethyl-1-butenyl, 3,3-dimethyl-2-butenyl, 1-ethyl-1-butenyl, 1-ethyl-2-butenyl, 1-ethyl-3-butenyl, 2-ethyl-1-butenyl, 2-ethyl-2-butenyl, 2-ethyl-3-butenyl, 1,1,2-trimethyl-2-propenyl, 1-ethyl-1-methyl-2-propenyl, 1-ethyl-2-methyl-1-propenyl and 1-ethyl-2-methyl-2-propenyl.
Alkynyl means straight-chain or branched hydrocarbyl radicals having the number of carbon atoms specified in each case and one triple bond in any position, e.g. C2-C6-alkynyl such as ethynyl, 1-propynyl, 2-propynyl (or propargyl), 1-butynyl, 2-butynyl, 3-butynyl, 1-methyl-2-propynyl, 1-pentynyl, 2-pentynyl, 3-pentynyl, 4-pentynyl, 3-methyl-1-butynyl, 1-methyl-2-butynyl, 1-methyl-3-butynyl, 2-methyl-3-butynyl, 1,1-dimethyl-2-propynyl, 1-ethyl-2-propynyl, 1-hexynyl, 2-hexynyl, 3-hexynyl, 4-hexynyl, 5-hexynyl, 3-methyl-1-pentynyl, 4-methyl-1-pentynyl, 1-methyl-2-pentynyl, 4-methyl-2-pentynyl, 1-methyl-3-pentynyl, 2-methyl-3-pentynyl, 1-methyl-4-pentynyl, 2-methyl-4-pentynyl, 3-methyl-4-pentynyl, 1,1-dimethyl-2-butynyl, 1,1-dimethyl-3-butynyl, 1,2-dimethyl-3-butynyl, 2,2-dimethyl-3-butynyl, 3,3-dimethyl-1-butynyl, 1-ethyl-2-butynyl, 1-ethyl-3-butynyl, 2-ethyl-3-butynyl and 1-ethyl-1-methyl-2-propynyl.
Cycloalkyl means a carbocyclic saturated ring system having preferably 3-8 ring carbon atoms, for example cyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl. In the case of optionally substituted cycloalkyl, cyclic systems with substituents are included, also including substituents with a double bond on the cycloalkyl radical, for example an alkylidene group such as methylidene.
In the case of optionally substituted cycloalkyl, polycyclic aliphatic systems are also included, for example bicyclo[1.1.0]butan-1-yl, bicyclo[1.1.0]butan-2-yl, bicyclo[2.1.0]pentan-1-yl, bicyclo[2.1.0]pentan-2-yl, bicyclo[2.1.0]pentan-5-yl, bicyclo[2.2.1]hept-2-yl (norbornyl), adamantan-1-yl and adamantan-2-yl.
In the case of substituted cycloalkyl, spirocyclic aliphatic systems are also included, for example spiro[2.2]pent-1-yl, spiro[2.3]hex-1-yl, spiro[2.3]hex-4-yl, 3-spiro[2.3]hex-5-yl.
Cycloalkenyl means a carbocyclic, nonaromatic, partially unsaturated ring system having preferably 4-8 carbon atoms, e.g. 1-cyclobutenyl, 2-cyclobutenyl, 1-cyclopentenyl, 2-cyclopentenyl, 3-cyclopentenyl, or 1-cyclohexenyl, 2-cyclohexenyl, 3-cyclohexenyl, 1,3-cyclohexadienyl or 1,4-cyclohexadienyl, also including substituents with a double bond on the cycloalkenyl radical, for example an alkylidene group such as methylidene. In the case of optionally substituted cycloalkenyl, the elucidations for substituted cycloalkyl apply correspondingly.
Alkoxy means saturated straight-chain or branched alkoxy radicals having the number of carbon atoms specified in each case, for example C1-C6-alkoxy such as methoxy, ethoxy, propoxy, 1-methylethoxy, butoxy, 1-methylpropoxy, 2-methylpropoxy, 1,1-dimethylethoxy, pentoxy, 1-methylbutoxy, 2-methylbutoxy, 3-methylbutoxy, 2,2-dimethylpropoxy, 1-ethylpropoxy, hexoxy, 1,1-dimethylpropoxy, 1,2-dimethylpropoxy, 1-methylpentoxy, 2-methylpentoxy, 3-methylpentoxy, 4-methylpentoxy, 1,1-dimethylbutoxy, 1,2-dimethylbutoxy, 1,3-dimethylbutoxy, 2,2-dimethylbutoxy, 2,3-dimethylbutoxy, 3,3-dimethylbutoxy, 1-ethylbutoxy, 2-ethylbutoxy, 1,1,2-trimethylpropoxy, 1,2,2-trimethylpropoxy, 1-ethyl-1-methylpropoxy and 1-ethyl-2-methylpropoxy. Halogen-substituted alkoxy means straight-chain or branched alkoxy radicals having the number of carbon atoms specified in each case, where some or all of the hydrogen atoms in these groups may be replaced by halogen atoms as specified above, e.g. C1-C2-haloalkoxy such as chloromethoxy, bromomethoxy, dichloromethoxy, trichloromethoxy, fluoromethoxy, difluoromethoxy, trifluoromethoxy, chlorofluoromethoxy, dichlorofluoromethoxy, chlorodifluoromethoxy, 1-chloroethoxy, 1-bromoethoxy, 1-fluoroethoxy, 2-fluoroethoxy, 2,2-difluoroethoxy, 2,2,2-trifluoroethoxy, 2-chloro-2-fluoroethoxy, 2-chloro-1,2-difluoroethoxy, 2,2-dichloro-2-fluoroethoxy, 2,2,2-trichloroethoxy, pentafluoroethoxy and 1,1,1-trifluoroprop-2-oxy. The term “aryl” denotes an optionally substituted mono-, bi- or polycyclic aromatic system having preferably 6 to 14, especially 6 to 10, ring carbon atoms, for example phenyl, naphthyl, anthryl, phenanthrenyl and the like, preferably phenyl.
The term “optionally substituted aryl” also includes polycyclic systems, such as tetrahydronaphthyl, indenyl, indanyl, fluorenyl, biphenylyl, where the bonding site is on the aromatic system. In systematic terms, “aryl” is generally also encompassed by the term “optionally substituted phenyl”.
The aryls listed above are preferably substituted, for example, by hydrogen, halogen, alkyl, haloalkyl, hydroxyl, alkoxy, cycloalkoxy, aryloxy, alkoxyalkyl, alkoxyalkoxy, cycloalkyl, halocycloalkyl, aryl, arylalkyl, heteroaryl, heterocyclyl, alkenyl, alkylcarbonyl, cycloalkylcarbonyl, arylcarbonyl, heteroarylcarbonyl, alkoxycarbonyl, hydroxycarbonyl, cycloalkoxycarbonyl, cycloalkylalkoxycarbonyl, alkoxycarbonylalkyl, arylalkoxycarbonyl, arylalkoxycarbonylalkyl, alkynyl, alkynylalkyl, alkylalkynyl, trisalkylsilylalkynyl, nitro, amino, cyano, haloalkoxy, haloalkylthio, alkylthio, hydrothio, hydroxyalkyl, heteroarylalkoxy, arylalkoxy, heterocyclylalkoxy, heterocyclylalkylthio, heterocyclyloxy, heterocyclylthio, heteroaryloxy, bisalkylamino, alkylamino, cycloalkylamino, hydroxycarbonylalkylamino, alkoxycarbonylalkylamino, arylalkoxycarbonylalkylamino, alkoxycarbonylalkyl(alkyl)amino, aminocarbonyl, alkylaminocarbonyl, bisalkylaminocarbonyl, cycloalkylaminocarbonyl, hydroxycarbonylalkylaminocarbonyl, alkoxycarbonylalkylaminocarbonyl, arylalkoxycarbonylalkylaminocarbonyl.
The term “halogen” means fluorine, chlorine, bromine or iodine. If the term is used for a radical, “halogen” means a fluorine, chlorine, bromine or iodine atom.
According to the nature of the substituents and the way in which they are joined, the compounds of the formula (I) may be present as stereoisomers. If, for example, one or more asymmetrically substituted carbon atoms and/or sulfoxides are present, enantiomers and diastereomers may occur. Stereoisomers can be obtained from the mixtures obtained in the preparation by customary separation methods, for example by chromatographic separation processes. It is likewise possible to selectively prepare stereoisomers by using stereoselective reactions with use of optically active starting materials and/or auxiliaries.
The invention also relates to all stereoisomers and mixtures thereof which are encompassed by the formula (I) but not defined specifically. However, the following text will, for the sake of simplicity, always mention compounds of the formula (I), even though this is understood as meaning not only the pure compounds, but also, if appropriate, mixtures with various amounts of isomeric compounds.
According to the nature of the substituents defined above, the compounds of the formula (I) have acidic properties and can form salts, if appropriate also internal salts or adducts, with inorganic or organic bases or with metal ions. If the compounds of the formula (I) carry hydroxyl, carboxyl or other groups which induce acidic properties, these compounds can be reacted with bases to give salts. Suitable bases are, for example, hydroxides, carbonates, bicarbonates of the alkali metals and alkaline earth metals, in particular those of sodium, potassium, magnesium and calcium, furthermore ammonia, primary, secondary and tertiary amines having (C1-C4)-alkyl groups, mono-, di- and trialkanolamines of (C1-C4)-alkanols, choline and chlorocholine, and also organic amines such as trialkylamines, morpholine, piperidine or pyridine. These salts are compounds in which the acidic hydrogen is replaced by an agriculturally suitable cation, for example metal salts, especially alkali metal salts or alkaline earth metal salts, in particular sodium and potassium salts, or else ammonium salts, salts with organic amines or quaternary ammonium salts, for example with cations of the formula [NRR′R″R′″]+ in which R to R′″ each independently of one another represent an organic radical, in particular alkyl, aryl, aralkyl or alkylaryl. Also suitable are alkylsulfonium and alkylsulfoxonium salts, such as (C1-C4)-trialkylsulfonium and (C1-C4)-trialkylsulfoxonium salts.
The compounds of the formula (I) can form salts by addition of a suitable inorganic or organic acid, for example mineral acids, for example HCl, HBr, H2SO4, H3PO4 or HNO3, or organic acids, for example carboxylic acids such as formic acid, acetic acid, propionic acid, oxalic acid, lactic acid or salicylic acid or sulfonic acids, for example p-toluenesulfonic acid, onto a basic group, for example amino, alkylamino, dialkylamino, piperidino, morpholino or pyridino. In such a case, these salts comprise the conjugate base of the acid as the anion.
Suitable substituents present in deprotonated form, such as, for example, sulfonic acids or carboxylic acids, may form inner salts with groups which for their part can be protonated, such as amino groups.
If a group is polysubstituted by radicals, this means that this group is substituted by one or more identical or different radicals from those mentioned.
In all the formulae specified hereinafter, the substituents and symbols have the same meaning as described in the general formula (I) of the herbicides (A), unless defined differently. Arrows in a chemical formula denote the points at which it is joined to the rest of the molecule.
Hereinbelow, preferred, particularly preferred and very particularly preferred meanings are described for each of the individual substituents of the herbicides (A) according to the general formula (I), as shown above. The other substituents of the herbicides (A) of the general formula (I) which are not specified hereinafter have the definition given above.
In a first embodiment of the present invention,
Particularly preferably, R3 represents methyl, vinyl, trifluoromethyl or methoxy.
In a second embodiment of the present invention,
More preferably,
In a third embodiment of the present invention,
More preferably,
Most preferably,
R5 represents (C1-C3)-alkyl substituted in each case by m radicals from the group consisting of fluorine, chlorine and bromine.
In a fourth embodiment of the present invention,
More preferably,
R7 represents hydrogen, or
Most preferably,
In a fifth embodiment of the present invention,
More preferably,
In a sixth embodiment of the present invention,
In a seventh embodiment of the present invention,
In the context of the present invention, the individual preferred, more preferred and most preferred meanings for the substituents R3, R5 to R8, R11, R12, X2 to X6 and Z can be combined with one another as desired.
This means that the present invention encompasses herbicides (A) of the general formula (I) in which, for example, the substituent R3 has a preferred meaning and the substituents R5 to R8 have the general meaning or else the substituent R5 has a preferred meaning, the substituent R11 has a particularly preferred or very particularly preferred meaning and the remaining substituents have a general meaning.
Two of these combinations of the definitions given above for the substituents R3, R5 to R8, R11, R12, X2 to X6 and Z are illustrated below by way of example, and each is disclosed as a further embodiment:
In an eighth embodiment of the present invention,
In a ninth embodiment of the present invention,
In a tenth embodiment of the present invention, the herbicidal composition, as well as at least one component (B) as defined above, preferably comprises (A) one or more compounds [component (A)] of the general formula (I) or agrochemically compatible salts thereof [herbicides (A)] according to Tables 1a and 1b.
The expression rel-(2R,4R) is in accordance with the IUPAC nomenclature, and means that both cis configurations of the substituents in the 2 and 4 positions exist.
In Tables 1a and 1b, the compounds are identified by the chemical formula of the main component, this component being present in a chemical purity of preferably at least 95 per cent by weight of the compound. The compounds can naturally also be used with lower purities. Especially when secondary components of the compounds consist entirely or predominantly of stereoisomers of the respective compounds (A), efficacies are achieved on application. Preferred herbicides (A) are therefore also mixtures of two or more compounds (A) according to the invention.
When the stereochemical orientation at a carbon atom is defined in Tables 1a and 1b, the main component of the compound is a stereoisomer or stereoisomer mixture having the R or S configuration at the carbon atom in question.
If no stereochemistry is defined, the compound is a racemate. If there are multiple stereocentres and the configuration of each is identified as R or S, the compounds have the stated stereochemistry at the centres in question.
If no R or S configuration is specified for multiple centres, the compounds are racemic mixtures, i.e. mirror-image stereoisomers (enantiomers of a pair of enantiomers) present therein are present in equal proportions in the mixture. Unless stated specifically, in Tables 1a and 1b, the diastereomeric components are present approximately in equal proportions in the case of racemic compounds (A) having multiple stereocentres. For practical use, however, mixtures of diastereomers having different proportions of the diastereomeric components exist in the case of racemic compounds having multiple stereocentres.
It is preferable here that the respective compounds listed are also present in a stereochemical purity of 60% to 100%, preferably 70-100%, especially 80% to 100%.
Preference is also given to the mixtures detailed of stereoisomeric compounds (A).
The compounds of the formula (I) are known from the application having the reference PCTEP2018065334, which was yet to be published at the priority date of the present application, and can be prepared by the processes described therein.
The application rates of the herbicides (A) are in the range from 0.01 to 2000 g of active substance per hectare (g a.i.ha hereinafter), preferably 0.02 to 1000 g a.i.ha, especially 0.5 to 750 g a.i.ha. In the combinations according to the invention, within the scope of the application rates mentioned by comparison to individual application, usually lower application rates of the respective active compound are required, preferably 0.01 to 1000 g a.i.ha, especially 0.02 to 500 g a.i.ha, and most preferably 5 to 250 g a.i.ha.
Suitable combination partners (B) [=component (B) or herbicides (B)] are in principle all active compounds from subgroups (B1) to (B11), where the herbicidal active compounds are largely named by the common name (in the English notation) according to the reference “The Pesticide Manual” 14th Ed., British Crop Protection Council 2006, abbreviated to “PM”, or the chemical name according to the standard nomenclatures (IUPAC or Chemical Abstracts).
However, some herbicides (B) have surprisingly been found to be particularly good combination partners. The preferred, particularly preferred and most preferred herbicides (B) are listed hereinafter as further embodiments of the present invention.
In an eleventh embodiment of the present invention, preference is given to the herbicidal active compounds (B1):
Particular preference is given to the herbicidal active compounds
In a twelfth embodiment of the present invention, preference is given to the herbicidal active compounds (B2):
Particular preference is given to
In a thirteenth embodiment of the present invention, preference is given to the herbicidal active compounds (B3)
In a fourteenth embodiment of the present invention, preference is given to the herbicidal active compounds (B4):
Particular preference is given to
In a fifteenth embodiment of the present invention, preference is given to the herbicidal active compounds (B5):
Particular preference is given to
In a sixteenth embodiment of the present invention, preference is given to the herbicidal active compounds (B6):
Particular preference is given to
In a seventeenth embodiment of the present invention, preference is given to the herbicidal active compounds (B7):
Particular preference is given to
In an eighteenth embodiment of the present invention, preference is given to the herbicidal active compounds (B8): p1 (B8.1) 2,4-D,
Particular preference is given to
In a nineteenth embodiment of the present invention, preference is given to the herbicidal active compounds (B9):
Most preference is given to (B9.10) saflufenacil.
In a twentieth embodiment of the present invention, preference is given to the herbicidal active compounds (B10):
Particular preference is given to (B10.5) diuron and
In a twenty-first embodiment of the present invention, preference is given to the herbicidal active compounds (B11):
Particular preference is given to
In the context of the present invention, it is possible to combine the individual preferred, particularly preferred and most preferred embodiments with one another as desired. This means that herbicidal compositions comprising (A) one or more compounds of the general formula (I) or agrochemically compatible salts thereof [component (A)] and (B) one or more herbicides [component (B)] selected from the group of the herbicidal active compounds (B1) to (B11) are encompassed by the present invention, in which any desired disclosed, preferred, particularly preferred and most preferred embodiments can be combined with one another as detailed above.
Some binary compositions comprising (A) one or more herbicidally active compounds (A) of the general formula (I) or agrochemically compatible salts thereof [herbicides (A)] and a herbicide (B) have surprisingly been found to be particularly advantageous. The preferred, particularly preferred and most preferred binary systems are listed hereinafter as further embodiments of the present invention.
In a twenty-second embodiment of the present invention, the composition preferably comprises
(A) a compound of the general formula (I) or agrochemically compatible salts thereof [herbicides (A)]
in which
R7 represents hydrogen, or
(B2.3) amidosulfuron,
In a twenty-third embodiment of the present invention, the composition preferably comprises
(A) a compound of the general formula (I) or agrochemically compatible salts thereof [herbicides (A)]
in which
(B) a herbicide [component (B)] from the group consisting of
Particularly preferred compositions in the context of the present invention are the compositions listed in Tables 2.1-2.5 below:
Furthermore, the combinations according to the invention can be employed together with other active compounds such as the active compounds mentioned (herbicides, fungicides, insecticides, acaricides etc.) and/or plant growth regulators or auxiliaries from the group of additives customary in crop protection, such as adjuvants and formulation aids. Here, the combination of the active crop protection compounds comprising the active compounds (A) and (B) and optionally further active compounds are referred to in short as “herbicide combination”. Their use forms such as formulations or tank mixes represent herbicidal compositions.
Accordingly, the invention also provides the herbicidal compositions comprising the active compound combinations according to the invention with additives customary in crop protection, such as adjuvants and formulation aids, and optionally further active crop protection compounds.
The invention also provides the use of the or the application method using the active compound combinations according to the invention as herbicides and plant growth regulators, preferably as herbicides and plant growth regulators having a synergistically active content of the respective active compound combination present.
The application rates of the herbicides (B) are known in principle and are generally in the range from 0.01 to 4000 g a.i.ha, preferably in the range from 0.02 to 2000 g a.i.ha, in particular 0.1 to 2000 g a.i.ha. For the active compound pelargonic acid (B5.38) from group (B5), the application rate is in the range from 1 to 100,000 g a.i.ha.
In the mixtures according to the invention, in the context of the application rates mentioned, generally lower application rates of the respective active compound are required compared to the individual application.
For the active compounds from group (B1), the application rate is preferably in the range from 5 to 250 g a.i.ha, in particular in the range from 5 to 150 g a.i.ha and most preferably in the range from 5 to 60 g a.i.ha.
For the active compounds from group (B2), the application rate is preferably in the range from 1 to 4000 g a.i.ha, in particular in the range from 1 to 2000 g a.i.ha and most preferably in the range from 1 to 400 g a.i.ha.
For the active compound from group (B3), the application rate is preferably in the range from 10 to 1000 g a.i.ha, in particular in the range from 10 to 500 g a.i.ha and most preferably in the range from 10 to 300 g a.i.ha.
For the active compound from group (B4), the application rate is preferably in the range from 1 to 700 g a.i.ha, in particular in the range from 1 to 400 g a.i.ha and most preferably in the range from 1 to 200 g a.i.ha.
For the active compound from group (B5), except for pelargonic acid (B5.38), the application rate is preferably in the range from 1 to 2400 g a.i.ha, in particular in the range from 1 to 1200 g a.i.ha and most preferably in the range from 1 to 400 g a.i.ha. For pelargonic acid (B.5.38), the application rate is preferably 1 to 100,000 g a.i.ha, more preferred 1 to 40,000 g a.i.ha and in particular in the range from 1 to 30,000 g a.i.ha.
For the active compound from group (B6), the application rate is preferably in the range from 10 to 1000 g a.i.ha, in particular in the range from 10 to 600 g a.i.ha.
For the active compound from group (B7), the application rate is preferably in the range from 20 to 3500 g a.i.ha, in particular in the range from 20 to 2500 g a.i.ha and most preferably in the range from 20 to 2000 g a.i.ha.
For the active compound from group (B8), the application rate is preferably in the range from 5 to 1500 g a.i.ha, in particular in the range from 5 to 1000 g a.i.ha and most preferably in the range from 5 to 900 g a.i.ha.
For the active compound from group (B9), the application rate is preferably in the range from 2 to 2000 g a.i.ha, in particular in the range from 2 to 1000 g a.i.ha, more preferably in the range from 2 to 200 g a.i.ha and most preferably in the range from 2 to 50 g a.i.ha.
For the active compound from group (B10), the application rate is preferably in the range from 20 to 3500 g a.i.ha, in particular in the range from 20 to 2000 g a.i.ha.
For the active compound from group (B11), the application rate is preferably in the range from 25 to 3000 g a.i.ha, in particular in the range from 25 to 2500 g a.i.ha and most preferably in the range from 25 to 2000 g a.i.ha.
The ratios of (A):(B) based on weight, depending on the effective application rates, are generally in the range from 1:100000 to 2000:1, preferably 1:40000 to 750:1, especially in the range from 1:15000 to 500:1 and even further preferably in the range from 1:300 to 400:1.
For the active compounds from groups (B1) to (B11), the preferred weight ratios (A):(B) are as follows:
The herbicidal compositions according to the invention can also be combined with further herbicides and plant growth regulators, for example to supplement the activity spectrum. Active compounds which can be employed as combination partners for the compounds according to the invention in mixed formulations or in the tank mix are, for example, known active compounds which are based on inhibition of, for example, acetolactate synthase, acetyl-CoA carboxylase, cellulose synthase, enolpyruvylshikimate-3-phosphate synthase, glutamine synthetase, p-hydroxyphenylpyruvate dioxygenase, phytoen desaturase, photosystem I, photosystem II, protoporphyrinogen oxidase, as are known, for example, from Weed Research 26 (1986) 441-445 or “The Pesticide Manual”, 14th edition, The British Crop Protection Council and the Royal Soc. of Chemistry, 2006, the corresponding “e-Pesticide Manual Version 4 (2006)” and the literature cited therein. Further trade names and “common names” are listed in the “Compendium of Pesticide Common Names” (available on the Internet at http:/www.alanwood.net/pesticides).
Known herbicides which may be mentioned as being suitable for being combined with the compounds according to the invention are, for example, the following active compounds (note: the compounds are referred to either by the “common name” in accordance with the International Organization for Standardization (ISO) or by the chemical name, if appropriate together with a customary code number), and in each case include all use forms, such as acids, salts, esters and isomers, such as stereoisomers and optical isomers. In this case, one or else, in some cases, more than one application form is mentioned:
2,4-D, acetochlor, acifluorfen, acifluorfen-sodium, aclonifen, alachlor, alloxydim, alloxydim-sodium, ametryn, amicarbazone, amidosulfuron, amitrole, anilofos, asulam, atrazine, azafenidin, azimsulfuron, beflubutamid, benazolin, benazolin-ethyl, benfuresate, bensulfuron-methyl, bentazone, benzfendizone, benzobicyclon, benzofenap, bifenox, bilanafos, bispyribac-sodium, bromacil, bromobutide, bromofenoxim, bromoxynil, butachlor, butafenacil, butenachlor, butralin, butroxydim, butylate, cafenstrole, carbetamide, carfentrazone-ethyl, chlomethoxyfen, chloridazon, chlorimuron-ethyl, chlornitrofen, chlorotoluron, chlorsulfuron, cinidon-ethyl, cinmethylin, cinosulfuron, clefoxydim, clethodim, clodinafop-propargyl, clomazone, clomeprop, clopyralid, cloransulam-methyl, cumyluron, cyanazine, cyclosulfamuron, cycloxydim, cyhalofop-butyl, desmedipham, dicamba, dichlobenil, dichlorprop, dichlorprop-P, diclofop-methyl, diclosulam, difenzoquat, diflufenican, diflufenzopyr, dikegulac-sodium, dimefuron, dimepiperate, dimethachlor, dimethametryn, dimethenamid, triaziflam, diquat-dibromide, dithiopyr, diuron, dymron, EPTC, esprocarb, ethalfluralin, ethametsulfuron-methyl, ethoxyfen, ethoxysulfuron, etobenzanid, fenoxaprop-ethyl, fenoxaprop-P-ethyl, fentrazamide, flamprop-M-isopropyl, flamprop-M-methyl, flazasulfuron, florasulam, fluazifop, fluazifop-butyl, fluazolate, flucarbazone-sodium, flucetosulfuron, fluchloralin, flufenacet, flufenpyr, flumetsulam, flumiclorac-pentyl, flumioxazin, fluometuron, fluorochloridone, fluoroglycofen-ethyl, flupoxam, flupyrsulfuron-methyl-sodium, fluridone, fluroxypyr, fluroxypyr-butoxypropyl, fluroxypyr-meptyl, flurprimidol, flurtamone, fluthiacet-methyl, fomesafen, foramsulfuron, glufosinate, glufosinate-ammonium, glyphosate, halosulfuron-methyl, haloxyfop, haloxyfop-ethoxyethyl, haloxyfop-methyl, haloxyfop-P-methyl, hexazinone, imazamethabenz-methyl, imazamox, imazapic, imazapyr, imazaquin, imazethapyr, imazosulfuron, indanofan, iodosulfuron-methyl-sodium, ioxynil, isoproturon, isouron, isoxaben, isoxachlortole, isoxaflutole, ketospiradox, lactofen, lenacil, linuron, MCPA, mecoprop, mecoprop-P, mefenacet, mesosulfuron-methyl, mesotrione, metamifop, metamitron, metazachlor, methabenzthiazuron, methyldymron, metobromuron, metolachlor, metosulam, metoxuron, metribuzin, metsulfuron-methyl, molinate, monolinuron, naproanilide, napropamide, neburon, nicosulfuron, norflurazon, orbencarb, oryzalin, oxadiargyl, oxadiazon, oxasulfuron, oxaziclomefone, oxyfluorfen, paraquat, pelargonic acid, pendimethalin, pendralin, pentoxazone, pethoxamid, phenmedipham, picloram, picolinafen, pinoxaden, piperophos, pretilachlor, primisulfuron-methyl, profluazol, profoxydim, prometryn, propachlor, propanil, propaquizafop, propisochlor, propoxycarbazone-sodium, propyzamide, prosulfocarb, prosulfuron, pyraclonil, pyraflufen-ethyl, pyrazolate, pyrazosulfuron-ethyl, pyrazoxyfen, pyribenzoxim, pyributicarb, pyridafol, pyridate, pyriftalid, pyriminobac-methyl, pyrithiobac-sodium, quinclorac, quinmerac, quinoclamine, quizalofop-ethyl, quizalofop-P-ethyl, quizalofop-P-tefuryl, rimsulfuron, sethoxydim, simazine, simetryn, S-metolachlor, sulcotrione, sulfentrazone, sulfometuron-methyl, sulfosate, sulfosulfuron, tebuthiuron, tepraloxydim, terbuthylazine, terbutryn, thenylchlor, thiazopyr, thifensulfuron-methyl, thiobencarb, tiocarbazil, tralkoxydim, triallate, triasulfuron, tribenuron-methyl, triclopyr, tridiphane, trifloxysulfuron, trifluralin, triflusulfuron-methyl, tritosulfuron, WL 110547, i.e. 5-phenoxy-1-[3-(trifluoromethyl)phenyl]-1H-tetrazole; HOK-201, HOK-202, UBH-509; D-489; LS 82-556; KPP-300; NC-324; NC-330; KH-218; DPX-N8189; SC-0774; TH-547, DOWCO-535; DK-8910; V-53482; PP-600; MBH-001; KIH-9201; ET-751; KIH-6127; KIH-2023 and KIH5996.
If the respective common name comprises a plurality of forms of the active compound, the name preferably defines the commercially available form.
Each of the further active compounds mentioned (=active compounds (C*), (C1*), (C2*) etc.) may then preferably be combined with a binary combination according to the present invention, according to the scheme (A)+(B)+(C*) or else according to the scheme (A)+(B)+(C1*)+(C2*) etc.
The stated amounts are application rates (g a.i.ha=grams of active substance per hectare) and thus also define the ratios in a co-formulation, a premix, a tank mix or a sequential application of the combined active compounds.
The combinations can be applied both by the pre-emergence method and by the post-emergence method. This applies both to the pre- and post-emergence with respect to the harmful plants and in the selective control of the harmful plants to the pre- and post-emergence of the crop plants. Mixed forms are also possible, for example after emergence of the crop plants control of the harmful plants at their pre- or post-emergence stage.
The herbicide combinations according to the invention may comprise further components, for example other active compounds against harmful organisms such as harmful plants, plant-damaging animals or plant-damaging fungi, here in particular active compounds from the group of the herbicides, fungicides, insecticides, acaricides, nematicides, miticides and related substances.
Fungicidally active compounds that can be used in combination with the herbicide combinations according to the invention are preferably standard commercial active compounds, for example (analogously to the herbicides, the compounds are generally named by their common names, here in the customary English spelling):
Preferred fungicides are selected from the group consisting of benalaxyl, bitertanol, bromuconazole, captafol, carbendazim, carpropamid, cyazofamid, cyproconazole, diethofencarb, edifenphos, fenpropimorph, fentine, fluquinconazol, fosetyl, fluoroimide, folpet, iminoctadine, iprodionem, iprovalicarb, kasugamycin, maneb, nabam, pencycuron, prochloraz, propamocarb, propineb, pyrimethanil, sprioxamine, quintozene, tebuconazole, tolylfluanid, triadimefon, triadimenol, trifloxystrobin, zineb.
Insecticidal, acaricidal, nematicidal, miticidal and related active compounds are, for example (analogously to the herbicides and fungicides, the compounds are referred to by their common names if possible, here in the customary English spelling):
Insecticides that can preferably be used together with the herbicides are, for example, as follows: acetamiprid, acrinathrin, aldicarb, amitraz, acinphos-methyl, cyfluthrin, carbaryl, cypermethrin, deltamethrin, endosulfan, ethoprophos, fenamiphos, fenthion, fipronil, imidacloprid, methamidophos, methiocarb, niclosamide, oxydemeton-methyl, prothiophos, silafluofen, thiacloprid, thiodicarb, tralomethrin, triazophos, trichlorfon, triflumuron, terbufos, fonofos, phorate, chlorpyriphos, carbofuran, tefluthrin.
The active compound combinations according to the invention are suitable for control of a broad spectrum of weeds on non-crop land, on pathways, on railway tracks, in industrial areas (“industrial weed control”) or in plantation crops, such as temperate, subtropical and tropical climates or geographies. Examples of plantation crops are oil palms, nuts (e.g. almonds, hazelnuts, walnuts, macadamia), coconut, berries, rubber trees, citrus (e.g. oranges, lemons, mandarins), bananas, pineapples, cotton, sugarcane, tea, coffee, cacao and the like. They are likewise suitable for use in pomiculture (e.g. pomaceous fruits such as apples, pears, cherries, mangoes and kiwis) and viticulture. The compositions can also be used for preparation for seeding (“burn-down”, “no-till” or “zero-till” method) or for treatment after harvesting (“chemical fallow”). The possible uses of the active compound combinations also extend to weed control in tree crops, for example young Christmas tree crops or eucalyptus crops, in each case before planting or after planting (including “over-top” treatment).
It is also possible to use the compositions for control of unwanted plant growth in economically important crop plants such as wheat (hard and soft wheat), maize, soya, sugarbeet, sugarcane, cotton, rice, beans (for example green beans and broad beans), flax, barley, oats, rye, triticale, potato and milletsorghum, pastureland and areas of grasslawn and plantation crops. Plantation crops include pome fruits (apples, pears, quinces), Ribes (blackberries, raspberries), citrus, Prunus (cherries, nectarines, almonds), nuts (walnuts, pecans, hazelnuts, cashews, macadamia), mango, cacao, coffee, grapes (table grapes, wine grapes), palms (such as oil palms, date palms, coconut palms), eucalyptus, kaki, persimmon, rubber, pineapple, banana, avocado, lychee, forestry crops (Eucalypteae, Piniaceae, Piceae, Meliaceae, etc.).
The herbicidal active compound combinations according to the invention, in the respective use forms (=herbicidal compositions), have synergies with regard to herbicidal action and selectivity, and favourable action with regard to the spectrum of weeds. They have excellent herbicidal efficacy against a broad spectrum of economically important monocotyledonous and dicotyledonous annual harmful plants. The active compounds also have good control over perennial harmful plants which are difficult to control and produce shoots from rhizomes, root stocks or other perennial organs.
For application, the active compound combinations can be deployed onto the plants (e.g. harmful plants such as mono- or dicotyledonous weeds or unwanted crop plants), the seed (e.g. grains, seeds or vegetative propagation organs such as tubers or parts of shoots having buds), or the area in which the plants grow (e.g. the growing area).
The substances can be deployed prior to sowing (if appropriate also by incorporation into the soil), prior to emergence or after emergence. Preference is given to use by the early post-seeding pre-emergence method or by the post-emergence method in plantation crops against harmful plants that have not yet emerged or have already emerged. The application can also be integrated into weed management systems with divided repeated applications (sequentials).
Specific examples of some representatives of the mono- and dicotyledonous weed flora which can be controlled by the active compound combinations according to the invention are as follows, though the enumeration is not intended to impose a restriction to particular species.
In the group of the monocotyledonous weed species, for example, Aegilops, Agropyron, Agrostis, Alopecurus, Apera, Avena, Brachicaria, Bromus, Cynodon, Dactyloctenium, Digitaria, Echinochloa, Eleocharis, Eleusine, Eragrostis, Eriochloa, Festuca, Fimbristylis, Imperata, Ischaemum, Heteranthera, Imperata, Leptochloa, Lolium, Monochoria, Panicum, Paspalum, Phalaris, Phleum, Poa, Rottboellia, Sagittaria, Scirpus, Setaria, Sorghum, Sphenoclea and Cyperus species are covered by the annual group.
In the case of dicotyledonous weed species, the spectrum of action extends to species such as, for example, Abutilon, Amaranthus, Ambrosia, Anoda, Anthemis, Aphanes, Artemisia, Atriplex, Bettis, Bidens, Capsella, Carduus, Cassia, Centaurea, Chenopodium, Cirsium, Convolvulus, Datura, Desmodium, Emex, Erodium, Erysimum, Euphorbia, Galeopsis, Galinsoga, Galium, Geranium, Hibiscus, Ipomoea, Kochia, Lamium, Lepidium, Lindernia, Matricaria, Mentha, Mercurialis, Mullugo, Myosotis, Papaver, Pharbitis, Plantago, Polygonum, Portulaca, Ranunculus, Raphanus, Rorippa, Rotala, Rumex, Salsola, Senecio, Sesbania, Sida, Sinapis, Solanum, Sonchus, Sphenoclea, Stellaria, Taraxacum, Thlaspi, Trifolium, Urtica, Veronica, Viola, Xanthium.
If the active compound combinations according to the invention are applied to the soil surface before germination, either the emergence of the weed seedlings is prevented completely or the weeds grow until they have reached the cotyledon stage, but then they stop growing and ultimately die completely after three to four weeks have passed.
If the active compounds are applied post-emergence to the green parts of the plants, growth stops after the treatment, and the harmful plants remain at the growth stage at the time of application, or they die completely after a certain time, so that in this manner competition by the weeds, which is harmful to the crop plants, is eliminated very early and in a sustained manner.
The herbicidal compositions according to the invention are notable for a rapid onset and long duration of herbicidal action. In general, the rainfastness of the active compounds in the combinations according to the invention is favourable. A particular advantage is that the effective dosages of compounds (A) and (B) that are used in the combinations can be adjusted to such a low level that their soil action is optimally low. Therefore, the use thereof in sensitive crops is not just enabled, but groundwater contamination is also virtually prevented. The combination according to the invention of active compounds allows the required application rate of the active compounds to be reduced considerably.
The combined use of herbicides (A) and (B) achieves performance properties extending beyond what was to be expected on account of the known properties of the individual herbicides for the combination thereof. For example, the herbicidal effects for a particular harmful plant species exceed the expected value as can be estimated by standard methods, for example according to Colby or other extrapolation methods.
A synergistic effect exists whenever the effect, the herbicidal effect here, of the active compound combinations is greater than the sum total of the effects of the active compounds applied individually. The expected activity for a given combination of two active compounds can be calculated according to S. R. Colby (“Calculating Synergistic and Antagonistic Responses of Herbicide Combinations”, Weeds 15 (1967), 20-22) (see below).
The synergistic effects therefore permit, for example, a reduction in the application rates of the individual active compounds, a higher efficacy at the same application rate, the control of species of harmful plants which are as yet uncovered (gaps), elevated residual action, an extended period of efficacy, an elevated speed of action, an extension of the period of application and/or a reduction in the number of individual applications required and—as a result for the user—weed control systems which are more advantageous economically and ecologically.
Even though the combinations according to the invention have excellent herbicidal activity with respect to mono- and dicotyledonous weeds, many economically important crop plants, depending on the structure of the respective active compound combinations according to the invention and the application rate thereof, are damaged only insignificantly, if at all. Economically important crops here are, for example, dicotyledonous crops from the genera of Arachis, Beta, Brassica, Cucumis, Cucurbita, Helianthus, Daucus, Glycine, Gossypium, Ipomoea, Lactuca, Linum, Lycopersicon, Nicotiana, Phaseolus, Pisum, Solanum, Vicia, or monocotyledonous crops from the genera of Allium, Ananas, Asparagus, Avena, Hordeum, Oryza, Panicum, Saccharum, Secale, Sorghum, Triticale, Triticum and Zea.
In addition, the compositions according to the invention have in some cases outstanding growth-regulating properties in crop plants. They intervene in the plants' own metabolism with regulatory effect, and can thus be used for the controlled influencing of plant constituents and to facilitate harvesting, for example by triggering desiccation and stunted growth. Furthermore, they are also suitable for the general control and inhibition of unwanted vegetative growth without killing the plants in the process. Inhibition of vegetative growth plays a major role for many mono- and dicotyledonous crops since this can reduce or completely prevent lodging.
Owing to their herbicidal and plant growth-regulatory properties, the compositions can be employed for controlling harmful plants in known plant crops or in tolerant crop plants still to be developed that have been modified by conventional mutagenesis or genetically modified. In general, the transgenic plants are distinguished by specific advantageous properties, in addition to resistances to the compositions according to the invention, for example by resistances to plant diseases or the causative organisms of plant diseases such as certain insects or microorganisms, such as fungi, bacteria or viruses. Other particular properties relate, for example, to the harvested material with regard to quantity, quality, storability, composition and specific constituents. For instance, there are known transgenic plants with an elevated starch content or altered starch quality, or those with a different fatty acid composition in the harvested material. Other particular properties may be tolerance or resistance to abiotic stressors, for example heat, low temperatures, drought, salinity and ultraviolet radiation.
Preferably, the active compound combinations according to the invention can be used as herbicides in crops of crop plants which are resistant, or have been made resistant by genetic engineering, to the phytotoxic effects of the herbicides.
Conventional ways of producing novel plants which have modified properties in comparison to existing plants consist, for example, in traditional cultivation methods and the generation of mutants.
Alternatively, novel plants with modified properties can be generated with the aid of recombinant methods (see, for example, EP-A-0221044, EP-A-0131624). For example, there have been descriptions in several cases of:
Numerous molecular biology techniques which can be used to produce novel transgenic plants with modified properties are known in principle; see, for example, I. Potrykus and G. Spangenberg (eds.) Gene Transfer to Plants, Springer Lab Manual (1995), Springer Verlag Berlin, Heidelberg, or Christou, “Trends in Plant Science” 1 (1996) 423-431.
For such recombinant manipulations, nucleic acid molecules which allow mutagenesis or sequence alteration by recombination of DNA sequences can be introduced into plasmids. With the aid of standard methods, it is possible, for example, to undertake base exchanges, remove parts of sequences or add natural or synthetic sequences. To join the DNA fragments with one another, adapters or linkers can be placed onto the fragments, see, for example, Sambrook et al., 1989, Molecular Cloning, A Laboratory Manual, 2nd edition Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y.; or Winnacker “Gene and Klone” [“Genes and clones”], VCH Weinheim 2nd edition 1996.
For example, the generation of plant cells with a reduced activity of a gene product can be achieved by expressing at least one corresponding antisense RNA, a sense RNA for achieving a cosuppression effect, or by expressing at least one suitably constructed ribozyme which specifically cleaves transcripts of the abovementioned gene product.
To this end, it is firstly possible to use DNA molecules which encompass the entire coding sequence of a gene product inclusive of any flanking sequences which may be present, and also DNA molecules which only encompass portions of the coding sequence, in which case it is necessary for these portions to be long enough to have an antisense effect in the cells. It is also possible to use DNA sequences which have a high degree of homology to the coding sequences of a gene product, but are not completely identical to them.
When expressing nucleic acid molecules in plants, the protein synthesized may be localized in any desired compartment of the plant cell. However, to achieve localization in a particular compartment, it is possible, for example, to join the coding region to DNA sequences which ensure localization in a particular compartment. Such sequences are known to those skilled in the art (see, for example, Braun et al., EMBO J. 11 (1992), 3219-3227; Wolter et al., Proc. Natl. Acad. Sci. USA 85 (1988), 846-850; Sonnewald et al., Plant J. 1 (1991), 95-106). The nucleic acid molecules can also be expressed in the organelles of the plant cells.
The transgenic plant cells can be regenerated by known techniques to give rise to entire plants. In principle, the transgenic plants may be plants of any desired plant species, i.e. not only monocotyledonous but also dicotyledonous plants. Thus, transgenic plants can be obtained whose properties are altered by overexpression, suppression or inhibition of homologous (=natural) genes or gene sequences or expression of heterologous (=foreign) genes or gene sequences. The active compound combinations according to the invention can preferably be used in transgenic crops that are tolerant or have been rendered tolerant to the active compounds used.
The active compound combinations according to the invention can preferably also be used in transgenic crops which are resistant to growth regulators such as, for example, dicamba, or to herbicides which inhibit essential plant enzymes, for example acetolactate synthases (ALS), EPSP synthases, glutamine synthases (GS) or hydroxyphenylpyruvate dioxygenases (HPPD), or to herbicides from the group of the sulfonylureas, the glyphosates, glufosinates or benzoylisoxazoles and analogous active compounds.
The invention therefore also provides a method for controlling unwanted plant growth, optionally in crops of crop plants, preferably on non-crop land or in plantation crops, characterized in that one or more herbicides of type (A) isare applied with one or more herbicides of type (B) to the crop plants, parts of plants or plant seeds (seed) thereof or to the growing area.
The invention also provides for the use of the novel combinations of compounds (A)+(B) for control of harmful plants, optionally in crops of crop plants, preferably on non-crop land and plantation crops, but also for control of harmful plants before the sowing of the subsequent crop plant, such as, in particular, for preparation for seeding (“burn-down application”).
The active compound combinations according to the invention may be produced either as mixed formulations of the two components, if appropriate with further active compounds, additives and/or customary formulation auxiliaries present, which are then applied in a customary manner diluted with water, or may be produced as so-called tank mixes by joint dilution of the separately formulated or partially separately formulated components with water.
The compounds (A) and (B) or their combinations can be formulated in various ways according to which biological and/or physicochemical parameters are required. Examples of general formulation options are: wettable powders (WP), water-soluble powders (SP), emulsifiable concentrates (EC), water-soluble concentrates, aqueous solutions (SL), emulsions (EW) such as oil-in-water and water-in-oil emulsions, spreadable solutions or emulsions, oil- or water-based dispersions, oil dispersions (OD), suspoemulsions, suspension concentrates (SC), oil-miscible solutions, capsule suspensions (CS), dusting products (DP), seed-dressing agents, granules for soil application or broadcasting, granules (GR) in the form of microgranules, spray granules, absorption granules and adsorption granules, water-dispersible granules (WG), water-soluble granules (SG), ULV formulations, microcapsules or waxes.
The invention therefore also provides herbicidal and plant-growth-regulating compositions which comprise the active compound combinations according to the invention.
The individual types of formulation are known in principle and are described, for example, in: Winnacker-Ktichler, “Chemische Technologie” [“Chemical technology”], Volume 7, C. Hanser Verlag Munich, 4th Ed. 1986, van Valkenburg, “Pesticide Formulations”, Marcel Dekker, N.Y., 1973; K.
Martens, “Spray Drying Handbook”, 3rd Ed. 1979, G. Goodwin Ltd. London.
The formulation auxiliaries required, such as inert materials, surfactants, solvents and further additives, are likewise known and are described, for example, in: Watkins, “Handbook of Insecticide Dust Diluents and Carriers”, 2nd Ed., Darland Books, Caldwell N. J., H.v. Olphen, “Introduction to Clay Colloid Chemistry”; 2nd Ed., J. Wiley & Sons, N.Y., C. Marsden, “Solvents Guide”, 2nd Ed., Interscience, N.Y. 1963; McCutcheon's “Detergents and Emulsifiers Annual”, MC Publ. Corp., Ridgewood N.J.; Sisley and Wood, “Encyclopedia of Surface Active Agents”, Chem. Publ. Co. Inc., N.Y. 1964, Schonfeldt, “Grenzflächenaktive Äthylenoxidaddukte” [“Interface-active Ethylene Oxide Adducts” ], Wiss. Verlagsgesellschaft, Stuttgart 1976, Winnacker-Küchler, “Chemische Technologie” [“Chemical Technology”], Volume 7, C. Hanser Verlag Munich, 4th Ed. 1986.
On the basis of these formulations, it is also possible to produce combinations with other pesticidally active substances, such as other herbicides, fungicides, insecticides or other pesticides (e.g. acaricides, nematicides, molluscicides, rodenticides, aphicides, avicides, larvicides, ovicides, bactericides, virucides, etc.), and safeners, fertilizers and/or growth regulators, for example in the form of a ready-to-use formulation or as a tank mix.
Wettable powders are preparations which can be dispersed uniformly in water and, in addition to the active compound, apart from a diluent or inert substance, also comprise surfactants of the ionic and/or nonionic type (wetting agents, dispersants), for example polyoxyethylated alkylphenols, polyoxyethylated fatty alcohols, polyoxyethylated fatty amines, fatty alcohol polyglycol ether sulfates, alkanesulfonates, alkylbenzenesulfonates, sodium lignosulfonate, sodium 2,2′-dinaphthylmethane-6,6′-disulfonate, sodium dibutylnaphthalenesulfonate or else sodium oleoylmethyltaurate. To produce the wettable powders, the herbicidal active compounds are finely ground, for example in customary apparatuses such as hammer mills, blower mills and air-jet mills, and simultaneously or subsequently mixed with the formulation auxiliaries.
Emulsifiable concentrates are produced by dissolving the active compound in an organic solvent, for example butanol, cyclohexanone, dimethylformamide, xylene, or else relatively high-boiling aromatics or hydrocarbons or mixtures of the organic solvents, with addition of one or more ionic and/or nonionic surfactants (emulsifiers). Examples of emulsifiers which may be used are: calcium alkylarylsulfonate salts, such as calcium dodecylbenzenesulfonate, or nonionic emulsifiers such as fatty acid polyglycol esters, alkylaryl polyglycol ethers, fatty alcohol polyglycol ethers, propylene oxide-ethylene oxide condensation products, alkyl polyethers, sorbitan esters, for example sorbitan fatty acid esters, or for example polyoxyethylene sorbitan fatty acid esters.
Dusting products are obtained by grinding the active compound with finely distributed solids, for example talc, natural clays, such as kaolin, bentonite and pyrophyllite, or diatomaceous earth. Suspension concentrates may be water- or oil-based. They may be prepared, for example, by wet-grinding by means of commercial bead mills and optional addition of surfactants as have, for example, already been listed above for the other formulation types.
Emulsions, for example oil-in-water emulsions (EW), can be produced, for example, by means of stirrers, colloid mills and/or static mixers using aqueous organic solvents and optionally surfactants as have, for example, already been listed above for the other formulation types.
Granules can be prepared either by spraying the active compound onto granular inert material capable of adsorption or by applying active compound concentrates to the surface of carrier substances, such as sand, kaolinites, or of granular inert material by means of adhesives, for example polyvinyl alcohol, sodium polyacrylate or mineral oils. Suitable active compounds can also be granulated in the manner customary for the production of fertilizer granules—if desired as a mixture with fertilizers.
Water-dispersible granules are produced generally by processes such as spray-drying, fluidized bed granulation, pan granulation, mixing with high-speed mixers and extrusion without solid inert material.
The agrochemical preparations generally comprise from 0.1 to 99% by weight, in particular from 0.2 to 95% by weight, of active compounds of types (A) and/or (B), the following concentrations being customary, depending on the type of formulation:
In wettable powders, the active compound concentration is, for example, about 10% to 95% by weight, the remainder to 100% by weight consisting of customary formulation constituents. In the case of emulsifiable concentrates, the active compound concentration can be about 1% to 90% by weight, preferably 5 to 80 per cent by weight.
Formulations in the form of dusts usually contain 5% to 20% by weight of active compound; sprayable solutions contain about 0.05 to 80, preferably 2 to 50, per cent by weight (% by weight) of active compound.
In the case of granules such as dispersible granules, the active compound content depends partially on whether the active compound is present in liquid or solid form and on which granulation auxiliaries and fillers are used. In general, the content in the water-dispersible granules is between 1% and 95% by weight, preferably between 10% and 80% by weight.
In addition, the active compound formulations mentioned optionally comprise the respective customary adhesives, wetting agents, dispersants, emulsifiers, penetrants, preservatives, antifreeze agents and solvents, fillers, colourants and carriers, antifoams, evaporation inhibitors and pH- or viscosity-modifying compositions.
For application, the formulations in commercial form are, if appropriate, diluted in a customary manner, for example in the case of wettable powders, emulsifiable concentrates, dispersions and water-dispersible granules with water. Dust-type preparations, granules for soil application or broadcasting and sprayable solutions are not normally diluted further with other inert substances prior to application.
The active compounds can be applied to the plants, plant parts, plant seeds or the area under cultivation (soil), preferably on the green plants and plant parts, and optionally additionally to the soil.
One possible use is the joint application of the active compounds in the form of tank mixes, where the optimally formulated concentrated formulations of the individual active compounds are, together, mixed in a tank with water, and the spray liquor obtained is applied.
A joint herbicidal formulation of the inventive combination of active compounds (A) and (B) has the advantage that it can be applied more easily since the quantities of the components are already adjusted to the correct ratio to one another. Moreover, the auxiliaries in the formulation can be adjusted optimally to one another, whereas a tank mix of different formulations may result in unwanted combinations of auxiliaries.
On application of the combinations according to the invention, herbicidal effects on a harmful plant species that exceed the formal sum total of the effects of the herbicides present where applied alone are frequently observed. Alternatively, in some cases, it is possible to observe that a smaller application rate for the herbicide combination is required in order to achieve the same effect for a harmful plant species compared to the individual preparations. Such increases in action or increases in effectiveness or reductions in application rate are a strong indication of a synergistic effect.
When the observed efficacies already exceed the formal sum total of the values of the tests with individual applications, they also exceed the expected value according to Colby, which is calculated using the formula below and is likewise regarded as an indication of synergism (cf. S. R. Colby; in Weeds 15 (1967) p. 20 to 22):
E
C
=A+B−(A·B/100)
where:
The observed values (EA) from the experiments, given suitable low dosages, show an effect of the combinations exceeding the expected values according to Colby (Δ).
Seeds or rhizome pieces of mono- and dicotyledonous weeds are placed in sandy loam in pots, covered with soil and grown in a greenhouse under good growth conditions (temperature, air humidity, water supply). Three weeks after sowing, the test plants are treated at the three-leaf stage with the compositions according to the invention. The compositions according to the invention formulated as spray powders or as emulsion concentrates are sprayed onto the green plant parts in various dosages with an application rate of 300 to 800 l/ha of water (equivalent). After the test plants have been left to stand in the greenhouse under optimal growth conditions for about 3 to 4 weeks, the action of the preparations is scored visually in comparison to untreated controls. The compositions according to the invention also have good post-emergence herbicidal activity against a broad spectrum of economically important weed grasses and broadleaved weeds.
Effects of the combinations according to the invention that exceed the formal sum total of the effects in the case of individual application of the herbicides are frequently observed here. The observed values from the experiments, given suitable low dosages, show an effect of the combinations exceeding the expected values according to Colby.
The experiments were conducted on outdoor plots in accordance with the greenhouse conditions from section 1. The rating was analogous to the experiments in section 1.
Crop plants were grown in outdoor plots under natural outdoor conditions, with laying-out of seeds or rhizome pieces of typical harmful plants or utilization of the natural weed flora. The treatment with the compositions according to the invention was effected after the harmful plants and the crop plants had emerged, generally at the 2- to 4-leaf stage; in some cases (as specified), individual active compounds or active compound combinations were applied pre-emergence or as a sequential treatment partly pre-emergence and/or post-emergence. In the case of plantation crops, in general, only the soil between the individual crop plants was treated with the active compounds.
After application, for example 2, 4, 6 and 8 weeks after application, the effect of the preparations was rated visually by comparison with untreated controls. The compositions according to the invention also have synergistic herbicidal activity in field trials against a broad spectrum of economically important weed grasses and broadleaved weeds. The comparison showed that the combinations according to the invention usually have greater, and in some cases considerably greater, herbicidal action than the sum total of the effects of the individual herbicides, and therefore suggests synergism. The effects over significant parts of the rating period were also above the expected values according to Colby, and therefore likewise suggest synergism. The crop plants, by contrast, were damaged only insignificantly, if at all, as a result of the treatments with the herbicidal compositions.
The following abbreviations are used in the description and the tables that follow: g a.i.ha=grams of active substance (active ingredient) (=100% active compound) per hectare;
The sum total of the effects of the individual applications is reported under EA; Expected values according to Colby are each reported under EC.
The biological results of the compositions according to the invention are summarized in Tables 3.1-3.2. The rating period is reported in days after application (DAT).
Digitaria sanguinalis
Echinochloa crus-galli
Setaria faberi
Setaria viridis
15 + 270
Eleusine indica
Sorghum halepense
Abutilon theophrasti
Ipomoea purpurea
Euphorbia heterophylla
Polygonum convulvulus
Alopecurus myosuroides (sensitive
Alopecurus myosuroides (resistant
Avena fatua
Galium aparine
Lamium purpureum
Lolium rigidum (resistant bio type)
Papaver rhoeas
Phalaris minor
Poa annua
Polygonum convolvulus
Stellaria media
Veronica hederifolia
Viola tricolor
Abutilon theophrasti
Amaranthus palmeri (res.)
Bidens pilosa
Brachiaria platyphylla
Digitaria sanguinalis
Echinochloa crus-galli
Eleusine indica
Kochia scoparia
Pharbitis purpurea
Polygonum convolvulus
Setaria viridis
Sorghum halepense
Abutilon theophrasti
Amaranthus palmeri (res.)
Brachiaria platyphylla
Eleusine indica
Kochia scoparia
Sorghum halepense
Bromus sterilis
Centaurea cyanus
Centaurea cyanus
Galium aparine
Galium aparine
Lamium purpureum L.
Lolium rigidum
Matricaria inodora
Viola tricolor
Viola tricolor
Alopecurus myosuroides
Alopecurus myosuroides
Centaurea cyanus
Galium aparine
Lamium purpureum L.
Lolium rigidum
Lolium rigidum
Lolium rigidum (resistant biotype)
Phalaris minor
Phalaris minor
Poa annua L.
Viola tricolor
Viola tricolor
Digitaria sanguinalis
Echinochloa crus-galli
Eleusine indica
Setaria faberi
Setaria viridis
Sorghum halepense
Abutilon theophrasti
Euphorbia heterophylla
Ipomoea purpurea
Polygonum convulvulus
Alopecurus myosuroides (sensitive
Alopecurus myosuroides (resistant
Avena fatua
Bromus sterilis
Galium aparine
Hordeum murinum
Lamium purpureum
Lolium rigidum (sensitive biotype)
Lolium rigidum (resistant biotype)
Papaverrhoeas
Phalaris minor
Poa annua
Polygonum convolvulus
Raphanus raphanistrum
Veronica hederifolia
Viola tricolor
Brachiaria platyphylla
Digitaria sanguinalis
Eleusine indica
Kochia scoparia
Polygonum convulvulus
Sorghum halepense
Kochia scoparia
Pharbitis purpurea
Alopecurus myosuroides
Alopecurus myosuroides
Bromus sterilis
Centaurea cyanus
Centaurea cyanus
Galium aparine
Galium aparine
Lamium purpureum L.
Lamium purpureum L.
Lolium rigidum (resistant bio type)
Poa annua L.
Viola tricolor
Viola tricolor
Alopecurus myosuroides
Alopecurus myosuroides
Bromus sterilis
Bromus sterilis
Centaurea cyanus
Centaurea cyanus
Galium aparine
Lamium purpureum L.
Lamium purpureum L.
Lolium rigidum
Lolium rigidum (resistant bio type)
Phalaris minor
Poa annua L.
Poa annua L.
Viola tricolor
Viola tricolor
Digitaria sanguinalis
Sorghum halepense
Setaria viridis
Abutilon theophrasti
Euphorbia heterophylla
Ipomoea purpurea
Polygonum convulvulus
Alopecurus myosuroides (sensitive
Alopecurus myosuroides (resistant
Avena fatua
Bromus sterilis
Centaurea cyanus
Galium aparine
Hordeum murinum
Lamium purpureum
Lolium rigidum (sensitive biotype)
Lolium rigidum (resistant biotype)
Phalaris minor
Polygonum convolvulus
Raphanus raphanistrum
Stellaria media
Veronica hederifolia
Viola tricolor
Amaranthus palmeri (res.)
Brachiaria platyphylla
Digitaria sanguinalis
Echinochloa crus-galli
Eleusine indica
Kochia scoparia
Pharbitis purpurea
Polygonum convolvulus
Sorghum halepense
Amaranthus palmeri (res.)
Kochia scoparia
Alopecurus myosuroides
Alopecurus myosuroides
Bromus sterilis
Bromus sterilis
Centaurea cyanus
Galium aparine
Lamium purpureum L.
Lamium purpureum L.
Lolium rigidum
Lolium rigidum (resistant biotype)
Lolium rigidum (resistant biotype)
Matricaria inodora
Matricaria inodora
Phalaris minor
Poa annua L.
Viola tricolor
Viola tricolor
Alopecurus myosuroides
Alopecurus myosuroides
Centaurea cyanus
Galium aparine
Lamium purpureum L.
Lolium rigidum
Lolium rigidum (resistant biotype)
Matricaria inodora
Matricaria inodora
Phalaris minor
Poa annua L.
Viola tricolor
Viola tricolor
| Number | Date | Country | Kind |
|---|---|---|---|
| 18211037.9 | Dec 2018 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2019/083228 | 12/2/2019 | WO | 00 |
