The present invention relates to increasing the activity of crop protection compositions comprising anthranilic acid diamides (anthranilamides) through the addition of ammonium salts and/or phosphonium salts or through the addition of ammonium or phosphonium salts and penetrants, to the corresponding compositions, to processes for preparing them and to their use in crop protection.
All inhibitors according to the invention of the nicotinic acetylcholine receptor are already known as agents for controlling animal pests, in particular insects, and can be prepared by processes described in the prior art. The activity of these compounds is good; however, in particular at low application rates and concentrations, it is not always entirely satisfactory. Furthermore, the compatibility of these compounds with plants is not always sufficient. There is therefore a need for increasing the activity of the crop protection compositions comprising the compounds.
The anthranilic acid diamides of the formula (I) are likewise known compounds which are known from the following publications, or comprised by them:
NL-A 9202078, WO 01/70671, WO 02/094791, JP-A 2003-212834, WO 03/015519, WO 03/016284, WO 03/015518, WO 03/015519, WO 03/024222, WO 03/016282, WO 03/016283, WO 03/062226, WO 03/027099, WO 04/027042, WO 04/033468.
Mixtures of anthranilic acid diamides with other active compounds are known from WO 05/107468. This publication also described mixtures with petroleum oils.
The anthranilic acid diamides can by summarized by the formula (I):
in which
If (a) R5 represents hydrogen, C1-C6-alkyl, C1-C6-haloalkyl, C2-C6-haloalkenyl, C2-C6-haloalkynyl, C1-C4-haloalkoxy, C1-C4-haloalkylthio or halogen and (b) R8 represents hydrogen, C1-C6-alkyl, C1-C6-haloalkyl, C2-C6-haloalkenyl, C2-C6-haloalkynyl, C1-C4-haloalkoxy, C1-C4-haloalkylthio, halogen, C2-C4-alkylcarbonyl, C2-C6-alkoxycarbonyl, C2-C6-alkylaminocarbonyl or C3-C8-dialkylaminocarbonyl, then (c) at least one substituent selected from the group consisting of R6, R11 and R12 is present and (d), if R12 is not present, at least one R6 or R11 is different from C2-C6-alkylcarbonyl, C2-C6 alkoxycarbonyl, C2-C6-alkylaminocarbonyl and C3-C8-dialkylaminocarbonyl.
The compounds according to the general formula (I) include N-oxides and salts.
Depending inter alia on the nature of the substituents, the compounds of the formula (I) can be present as geometrical and/or optical isomers or isomer mixtures of varying composition which, if appropriate, can be separated in a customary manner. The present invention provides both the pure isomers and the isomer mixtures, their preparation and use and compositions comprising them. However, for the sake of simplicity, hereinbelow only compounds of the formula (I) are referred to, although what is meant is both the pure compounds and, if appropriate, mixtures having various proportions of isomeric compounds.
Preference is given to compounds of the formula (I-1)
in which
In the radical definitions mentioned as being preferred, halogen represents fluorine, chlorine, bromine and iodine, in particular fluorine, chlorine and bromine.
Particular preference is given to compounds of the formula (I-1) in which
Very particular preference is given to the following compounds of the formula
Especially preferred are the following compounds:
Phthalic acid diamides have a broad insecticidal action; however, in individual cases the activity is unsatisfactory.
Descriptions have already been given in the literature to the effect that the activity of various active compounds can be increased through addition of ammonium or phosphonium salts. The salts in question, however, are salts with a detergent effect (for example WO 95/017817) and/or salts having relatively long alkyl and/or aryl substituents, which have a permeabilizing effect or which increase the solubility of the active compound (for example EP-A 0 453 086, EP-A 0 664 081, FR-A 2 600 494, U.S. Pat. No. 4,844,734, U.S. Pat. No. 5,462,912, U.S. Pat. No. 5,538,937, Ser. No. 03/0224939, Ser. No. 05/0009880, Ser. No. 05/0096386). Furthermore, the prior art describes the activity only for certain active compounds and/or certain applications of the composition in question. In still other cases, they are salts of sulphonic acids where the acids for their part have a paralysing action on insects (U.S. Pat. No. 2,842,476). An activity increase through ammonium sulphate is described for the herbicides glyphosate and phosphinothricin (U.S. Pat. No. 6,645,914, EP-A 0 036 106). However, this prior art neither discloses nor suggests a corresponding activity for insecticides.
Also, the use of ammonium sulphate as a formulating auxiliary has been described for certain active compounds and applications (WO 92/16108), but it is used there for the purpose of stabilizing the formulation, not for increasing activity.
It has now been found, entirely surprisingly, that the activity of insecticides from the class of the anthranilic acid diamides can be increased significantly through the addition of ammonium salts and/or phosphonium salts to the as-used solution (tank mix application) or through the incorporation of these salts into a formulation comprising such insecticides. Accordingly, the present invention provides the use of ammonium salts and/or phosphonium salts for increasing the activity of crop protection compositions comprising insecticidally active inhibitors of the nicotinic acetylcholine receptor as active compound. The invention also provides compositions comprising such insecticides and activity-increasing ammonium salts and/or phosphonium salts, specifically including not only formulated active compounds but also ready-to-use compositions (spray liquors). Finally, the invention also provides the use of these compositions for controlling harmful insects.
Ammonium salts and phosphonium salts which, according to the invention, increase the activity of crop protection compositions comprising anthranilic acid diamides are defined by formula (II)
in which
The ammonium salts and phosphonium salts of the formula (II) can be used in a broad concentration range to increase the activity of crop protection compositions comprising anthranilamides. In general, the ammonium salts or phosphonium salts are used in the ready-to-use crop protection composition in a concentration of from 0.5 to 80 mmol/l, preferably from 0.75 to 37.5 mmol/l, particularly preferably from 1.5 to 25 mmol/l. In the case of a formulated product, the ammonium salt concentration and/or phosphonium salt concentration in the formulation is chosen such that it is within these stated general, preferred or very preferred ranges after the formulation has been diluted to the desired active compound concentration. The concentration of the salt in the formulation here is typically 1-50% by weight.
In a preferred embodiment of the invention, the activity is increased by adding to the crop protection compositions not only an ammonium salt and/or phosphonium salt but also, additionally, a penetrant. It is considered entirely surprising that even in these cases an even greater activity increase is observed. The present invention therefore likewise provides the use of a combination of penetrant and ammonium salts and/or phosphonium salts for increasing the activity of crop protection compositions comprising insecticidally active inhibitors of the nicotinic acetylcholine receptor as active compound. The invention likewise provides compositions which comprise insecticidally active inhibitors of the nicotinic acetylcholine receptor, penetrants and ammonium salts and/or phosphonium salts, including specifically not only formulated active compounds but also ready-to-use compositions (spray liquors). The invention additionally provides, finally, for the use of these compositions for controlling harmful insects.
Suitable penetrants in the present context include all those substances which are typically used to enhance the penetration of agrochemically active compounds into plants. Penetrants are defined in this context by their ability to penetrate from the aqueous spray liquor and/or from the spray coating into the cuticle of the plant and thereby to increase the mobility of active compounds in the cuticle. The method described in the literature (Baur et al., 1997, Pesticide Science 51, 131-152) can be used in order to determine this property.
Suitable penetrants are, for example, alkanol alkoxylates. Penetrants according to the invention are alkanol alkoxylates of the formula
R—O-(-AO)V—R′ (III)
in which
A preferred group of penetrants are alkanol alkoxylates of the formula
R—O-(-EO—)w—R′ (III-a)
in which
A further preferred group of penetrants are alkanol alkoxylates of the formula
R—O-(-EO—)b—(—PO—)q—R′ (III-b)
in which
A further preferred group of penetrants are alkanol alkoxylates of the formula
R—O—(—PO—)r-(EO—)s—R (III-c)
in which
A further preferred group of penetrants are alkanol alkoxylates of the formula
R—O-(-EO—)b—(—BO—)q—R′ (III-d)
in which
A further preferred group of penetrants are alkanol alkoxylates of the formula
R—O—(—BO—)r-(-EO—)s—R′ (III-e)
in which
A further preferred group of penetrants are alkanol alkoxylates of the formula
CH3—(CH2)r—CH2—O—(—CH2—CH2—O—)u—R′ (III-f)
in which
In the formulae given above,
An example which may be mentioned of an alkanol alkoxylate of the formula (III-c) is 2-ethylhexyl alkoxylate of the formula
in which
the numbers 8 and 6 are average values.
An example which may be mentioned of an alkanol alkoxylate of the formula (III-d) is the formula
CH3—(CH2)10—O-(-EO—)6—(—BO—)2—CH3 (III-d-1)
in which
Particularly preferred alkanol alkoxylates of the formula (I-f) are compounds of this formula in which
The alkanol alkoxylate of the formula (III-f-1)
CH3—(CH2)t—CH2—O-(—CH2—CH2—O—)u—H (III-f-1)
in which
The above formulae provide a general definition of the alkanol alkoxylates. These substances are mixtures of substances of the stated type with different chain lengths. The indices therefore have average values which may also deviate from whole numbers.
The alkanol alkoxylates of the formulae stated are known and in some cases are available commercially or can be prepared by known methods (cf. WO 98-35 553, WO 00-35 278 and EP-A 0 681 865).
Suitable penetrants also include, for example, substances which promote the solubility of the compounds of the formula (I) in a spray coating. These include, for example, mineral and vegetable oils. Suitable oils are all mineral or vegetable oils—modified or otherwise—which can typically be used in agrochemical compositions. Mention may be made by way of example of sunflower oil, rapeseed oil, olive oil, castor oil, colza oil, maizeseed oil, cottonseed oil and soybean oil, or the esters of said oils. Preference is given to rapeseed oil, sunflower oil and their methyl or ethyl esters.
The concentration of penetrants in the compositions according to the invention can be varied within a wide range. In the case of a formulated crop protection composition, it is generally from 1 to 95% by weight, preferably from 1 to 55% by weight, particularly preferably from 15 to 40% by weight. In the ready-to-use compositions (spray liquors), the concentration is generally between 0.1 and 10 g/l, preferably between 0.5 and 5 g/l.
Inventively emphasized combinations of active compound, salt and penetrant are listed in the table below. Here, “as per test” means that any compound that acts as a penetrant in the cuticle penetration test (Baur et al., 1997, Pesticide Science 51, 131-152) is suitable.
Crop protection compositions according to the invention may also comprise further components, for example, surfactants and/or dispersing auxiliaries or emulsifiers.
Suitable nonionic surfactants and/or dispersing auxiliaries include all substances of this type that can usually be used in agrochemical compositions. Polyethylene oxide/polypropylene oxide block copolymers, polyethylene glycol ethers of straight-chain alcohols, reaction products of fatty acids with ethylene oxide and/or propylene oxide, furthermore polyvinyl alcohol, polyvinyl pyrrolidone, copolymers of polyvinyl alcohol and polyvinyl pyrrolidone and copolymers of (meth)acrylic acid and (meth)acrylic esters, and additionally alkyl ethoxylates and alkylaryl ethoxylates, which optionally may be phosphated and optionally may be neutralized with bases, examples of which that may be mentioned being sorbitol ethoxylates, and also polyoxyalkyleneamine derivatives may be mentioned as being preferred.
Suitable anionic surfactants are all substances of this type that can usually be used in agrochemical compositions. Preference is given to alkali metal salts and alkaline earth metal salts of alkylsulphonic acids or alkylarylsulphonic acids.
A further preferred group of anionic surfactants and/or dispersing auxiliaries are the following salts that are of low solubility in plant oil: salts of polystyrenesulphonic acids, salts of polyvinylsulphonic acids, salts of naphthalenesulphonic acid/formaldehyde condensation products, salts of condensation products of naphthalenesulphonic acid, phenolsulphonic acid and formaldehyde, and salts of lignosulphonic acid.
Suitable additives which may be included in the formulations according to the invention are emulsifiers, foam inhibitors, preservatives, antioxidants, colorants and inert filling materials.
Preferred emulsifiers are ethoxylated nonylphenols, reaction products of alkylphenols with ethylene oxide and/or propylene oxide, ethoxylated arylalkylphenols, and also ethoxylated and propoxylated arylalkylphenols, and also sulphated or phosphated arylalkyl ethoxylates and/or arylalkyl ethoxypropoxylates, mention being made by way of example of sorbitan derivatives, such as polyethylene oxide sorbitan fatty acid esters and sorbitan fatty acid esters.
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amounts of solvent and emulsifier, and the concentrate is diluted with emulsifier-containing water to the desired concentration. If addition of ammonium salts or ammonium salts and penetrant is required, the appropriate amount is added by pipette after dilution of the respective finished preparation solution.
Bell pepper plants (Capsicum annuum) which are heavily infested by the Green peach aphid (Myzus persicaei) are treated by spraying with the active compound preparation of the desired concentration.
After the desired period of time, the kill in % is determined. 100% means that all aphids have been killed; 0% means that none of the aphids have been killed.
In this test, for example, the following embodiments of the invention show good activity: see table below
Aphis gossypii Test (APHIGO)
To produce a suitable preparation of active compound, 1 part by weight of active compound is mixed with the stated amounts of solvent and emulsifier, and the concentrate is diluted with emulsifier-containing water to the desired concentration. If addition of ammonium salts or ammonium salts and penetrant is required, the appropriate amount is added by pipette after dilution of the respective finished preparation solution.
Cotton leaves (Gossypium hirsutum) which are heavily infested by the cotton aphid (Aphis gossypii) are sprayed with an active compound preparation of the desired concentration.
After the desired period of time, the kill in % is determined. 100% means that all aphids have been killed; 0% means that none of the aphids have been killed.
In this test, for example, the following embodiments of the invention show good activity: see table below
Number | Date | Country | Kind |
---|---|---|---|
102005059470.0 | Dec 2005 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/EP2006/011471 | 11/30/2006 | WO | 00 | 9/19/2008 |