Patent Application
20170049097
Subject matter of the present invention is an emulsifiable concentrate comprising a water-insoluble pesticide, an alkyl lactate, and a lactamide of the formula (I) as defined herein. The invention further relates to a process for the preparation of said concentrate; an emulsion obtainable by mixing water, a water-insoluble pesticide, the alkyl lactate and the lactamide of the formula (I); and to a method for controlling phytopathogenic fungi and/or undesired vegetation and/or undesired attack by insects or mites and/or for regulating the growth of plants, where the concentrate or the emulsion is allowed to act on the respective pests, their environment or on the crop plants to be protected from the respective pests, on the soil and/or on undesired plants and/or on the crop plants and/or their environment. The present invention comprises combinations of preferred features with other preferred features.
Emulsifiable concentrates (also referred to as EC) are widely used formulations in crop protection. The disadvantage of the known emulsifiable concentrates is the poor cold stability, the pronounced tendency to crystallize and the low pesticide concentration.
It was an object of the present invention to provide an emulsifiable concentrate which overcomes these disadvantages.
The object was achieved by an emulsifiable concentrate comprising a water-insoluble pesticide, an alkyl lactate, and a lactamide of the formula (I)
H3C—CH(OH)—C(O)N(R1)2 (I)
where R1 is methyl, ethyl, propyl, butyl, or mixtures thereof.
Usually, an emulsifiable concentrate is taken to mean compositions which form an oil-in-water emulsion upon mixing with water (e.g. in a weight ratio of 1 part concentrate to 99 parts water). The emulsion usually arises spontaneously. The resulting emulsion may have an average droplet size of more than 0.1 μm, preferably more than 0.5 μm, in particular more than 0.8 μm, and most preferred more than 1.1 μm. The average droplet size may be determined by laser diffraction, e.g. with a Malvern Mastersizer 2000.
The concentrate is preferably present as a homogeneous solution. It is usually virtually free from dispersed particles.
Suitable alkyl lactates are C1-C18 alkyl lactates, where the alkyl radical may be branched or unbranched, saturated or unsaturated. The alkyl radical is preferably branched. The alkyl radical is preferably saturated. The alkyl radical is particularly preferably branched and saturated. Preferred alkyl lactates are C4-C14 alkyl lactates, particularly preferably C6-C10 alkyl lactates, in particular branched or unbranched octyl lactate. Examples of octyl lactates are 1-ethylhexyl, 2-ethylhexyl, 3-ethylhexyl, 4-ethylhexyl, 1-methylheptyl, 2-methylheptyl, 3-methylheptyl, 4-methylheptyl, 5-methylheptyl, 6-methylheptyl, or n-octyl. A preferred octyl lactate is 2-ethylhexyl lactate. The lactate group can be present in different stereoisomers, for example as D- or L-lactate. Preference is given to the L-lactate group. An especially preferred alkyl lactate is L-(2-ethylhexyl) lactate. The formulation can comprise one or more alkyl lactates, it preferably comprising exactly one alkyl lactate.
The concentrate can comprise up to 60% by weight, preferably up to 45% by weight and in particular up to 35% by weight of the alkyl lactate. The concentrate can comprise at least 1% by weight, preferably at least 3% by weight and in particular at least 7% by weight of the alkyl lactate.
It may be suitable, if the concentrate comprises from 1% to 60% by weight, in particular 3% to 60% by weight, more specifically 5% to 60% by weight of the alkyl lactate.
In a further embodiment, the concentrate comprises from 1% to 45% by weight, in particular 3% to 45% by weight, more specifically 5% to 45% by weight of the alkyl lactate.
Preferred lactamides of the formula (I) are those in which R1 is methyl. In case R1 is propyl or butyl, these alkyl groups may be linear or branched (e.g. iso-propyl, or tert-butyl).
The concentrate can comprise up to 45% by weight, preferably up to 30% by weight and in particular up to 15% by weight of the lactamide of the formula (I). According to a further embodiment, it may be favorable, if the concentrate comprises up to 20% by weight of the lactamide of the formula (I). The concentrate can comprise at least 0.3% by weight, preferably at least 1% by weight and in particular at least 3% by weight of the lactamide of the formula (I).
It may be suitable, if the concentrate comprises from 0.3% to 45% by weight, preferably from 1% to 45% by weight, more specifically from 3% to 45% by weight of the lactamide of the formula (I).
In a further embodiment, the concentrate comprises from 0.3% to 30% by weight, preferably from 1% to 30% by weight, more specifically from 3% to 30% by weight of the lactamide of the formula (I).
In still a further embodiment, the concentrate comprises from 0.3% to 20% by weight, preferably from 1% to 20% by weight, more specifically from 3% to 20% by weight of the lactamide of the formula (I).
The weight ratio of the alkyl lactate to the lactamide of the formula (I) may be in the range from 1:3 to 20:1, preferably from 1:2 to 15:1, more preferably from 1:1 to 10:1, and in particular from 1.7:1 to 8:1.
The concentrate may further comprise an amide of the formula (II)
R3—C(O)N(R2)2 (II)
where R3 is C5-C19-alkyl and R2 is methyl, ethyl, propyl, butyl, or mixtures thereof, in addition to alkyl lactate and the lactamide of formula (I). Preferred amides of the formula (II) are those in which R3 is C7-C13-alkyl (preferably linear) and R2 is methyl. Especially preferred amides of the formula (II) are those in which R3 is C7-C11-alkyl and R2 is methyl. In particular, R3 is n-nonyl and R2 is methyl. Mixtures of amides of the formula (II) are also possible, for example mixtures where R3 is C7-C11-alkyl and R2 is methyl.
The concentrate can comprise up to 60% by weight, preferably up to 45% by weight and in particular up to 35% by weight of the amide of the formula (II). The concentrate can comprise at least 1% by weight, preferably at least 3% by weight and in particular at least 7% by weight of the amide of the formula (II).
In a preferred form the concentrate is free from hydrocarbon solvents. In another form, the concentrate is essentially free from hydrocarbon solvents. It can comprise not more than 3% by weight, preferably not more than 1% by weight and in particular not more than 0.5% by weight of hydrocarbon solvents. In special form, the concentrate may comprise not more than 0.3% by weight and in particular not more than 0.1% by weight of hydrocarbon solvents. The term “hydrocarbon solvents” usually refers to aliphatic (such as linear or cyclic) or aromatic hydrocarbons. Preferred hydrocarbon solvents are aromatic hydrocarbons. Aromatic hydrocarbons may, besides at least one aromatic hydrocarbon unit, also comprise aliphatic hydrocarbon substituents. In most cases, the hydrocarbon solvent has a solubility in water of not more than 5% by weight, preferably not more than 1% by weight and in particular not more than 0.3% by weight at 20° C. In most cases, the hydrocarbon solvent has a boiling point at 1013 mbar of at least 100° C., preferably at least 150° C. and in particular at least 180° C. Usually, the hydrocarbon solvent comprises only carbon and hydrogen atoms. The hydrocarbon solvent is preferably a C6-C20-hydrocarbon, in particular a C8-C16-hydrocarbon.
The concentrate can comprise from 2 to 65% by weight of the alkyl lactate (e.g. linear or branched C2-C18 alkyl lactates), 1 to 35% by weight of the lactamide of the formula (I) (e.g. in which R1 is C1-C4 alkyl), and optionally 1 to 65% by weight of the amide of formula (II) (e.g. in which R3 is C7-C13-alkyl and R2 is methyl), wherein the amounts of these components adds up to a sum of 10 to 90% by weight.
Preferably, the concentrate can comprise from 5 to 45% by weight of the alkyl lactate (e.g. linear or branched C4-C14 alkyl lactates), 1 to 20% by weight of the lactamide of the formula (I) (e.g. in which R1 is methyl), and optionally 5 to 45% by weight of the amide of formula (II) (e.g. in which R3 is C7-C13-alkyl and R2 is methyl), wherein the amounts of these components adds up to a sum of 15 to 80% by weight.
In particular, the concentrate can comprise from 7 to 35% by weight of the alkyl lactate (e.g. linear or branched C6-C10 alkyl lactates), 3 to 12% by weight of the lactamide of the formula (I) (e.g. in which R1 is methyl), and optionally 7 to 35% by weight of the amide of formula (II) (e.g. in which R3 is C7-C13-alkyl and R2 is methyl), wherein the amounts of these components adds up to a sum of 20 to 65% by weight.
In most cases, the concentrate is free from water. In another form, the concentrate is essentially or largely, respectively, free from water. It can comprise not more than 3% by weight, preferably not more than 1% by weight and in particular not more than 0.5% by weight of water. In special form, the concentrate may comprise not more than 0.3% by weight and in particular not more than 0.1% by weight of water.
The concentrate may comprise further solvents (e.g. the organic solvents listed below) in addition alkyl lactate and the lactamide of the formula (I). The concentrate can comprise not more than 30% by weight, preferably not more than 10% by weight and in particular not more than 1% by weight of the further solvents.
In one particular embodiment, in any one of the embodiments of the inventive concentrate described herein the pesticide is present in dissolved form, the concentrate is largely free from water and the concentrate is largely free from hydrocarbon solvents.
The term pesticide refers to at least one active substance selected from the group of the fungicides, insecticides, nematicides, herbicides, safeners, biopesticides and/or growth regulators. Preferred pesticides are fungicides, insecticides, herbicides and growth regulators. Especially preferred pesticides are fungicides. Mixtures of pesticides of two or more of the abovementioned classes may also be used. The skilled worker is familiar with such pesticides, which can be found, for example, in the Pesticide Manual, 16th Ed. (2013), The British Crop Protection Council, London. The following classes A) to K) refer to fungicides.
According to one embodiment, the pesticide is selected from the class B) Sterol biosynthesis inhibitors (SBI fungicides), more particularly selected from C14 demethylase inhibitors (DMI fungicides). In particular, the pesticide is selected from the group of triazole fungicides, more specifically is a compound of the following formula:
wherein
According to one further particular embodiment, the pesticide is selected from the triazoles I-1 to 1-31:
The structures of the compounds I-1 to 1-31 are as follows:
and
According to one particular embodiment of the invention, the pesticide is selected from the compounds I-1, I-2, I-3, I-4, I-5, I-14 and I-19. According to a further particular embodiment of the invention, the pesticide is selected from the compounds I-1, I-3, I-4, I-5 and I-19. According to still a further particular embodiment of the invention, the pesticide is selected from the compounds I-1, I-3, I-5 and I-19.
The triazole fungicides of formula I, in particular I-1 to I-31, are known as fungicides. They can be obtained by various routes in analogy to prior art processes known (cf. J. Agric. Food Chem. (2009) 57, 4854-4860; EP 0 275 955 A1; DE 40 03 180 A1; EP 0 113 640 A2; EP 0 126 430 A2). Furthermore, the compounds of formula I, their preparation and use in crop protection are described in WO 2013/007767 (PCT/EP2012/063626), WO 2013/024076 (PCT/EP2012/065835), WO 2013/024075 (PCT/EP2012/065834), WO 2013/024077 (PCT/EP2012/065836), WO 2013/024081 (PCT/EP2012/065848), WO 2013/024080 (PCT/EP2012/065847), WO 2013/024083 (PCT/EP2012/065852) WO 2013/010862 (PCT/EP2012/063526), WO 2013/010894 (PCT/EP2012/063635), WO 2013/010885 (PCT/EP2012/063620), WO 2013/024082 (PCT/EP2012/065850), which also disclose certain compositions with other active compounds. Owing to the basic character of their nitrogen atoms, they are capable of forming salts or adducts with inorganic or organic acids or with metal ions, in particular salts with inorganic acids or N-oxides.
The compounds I comprise chiral centers and they may be obtained in the form of racemates. The R- and S-enantiomers of the triazole compounds can be separated and isolated in pure form with methods known by the skilled person, e.g. by using chiral HPLC. Suitable for use are both the enantiomers and compositions thereof. Furthermore, said compounds I can be present in different crystal modifications, which may differ in biological activity.
In particular, in each case, any proportions of the (R)-enantiomer and the (S)-enantiomer of the respective compound I-1, I-2, I-3, I-4, I-5, etc., respectively, may be present. For example, the (R)-enantiomer of compound I-3 is (R)-2-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-1-(1,2,4-triazol-1-yl)propan-2-ol; the (S)-enantiomer of 1-3 is (S)-2-[4-(4-chlorophenoxy)-2-(trifluoromethyl)phenyl]-1-(1,2,4-triazol-1-yl)propan-2-ol. This applies to the other compounds accordingly.
The respective compound I-1, I-2, I-3, I-4 or I-5, respectively, etc., may be provided and used as (R)-enantiomer with an enantiomeric excess (e.e.), e.g. of at least 40%, for example, at least 50%, 60%, 70% or 80%, preferably at least 90%, more preferably at least 95%, yet more preferably at least 98% and most preferably at least 99%. According to a further specific embodiment, the respective compound I is provided and used as (S)-enantiomer with an enantiomeric excess (e.e.) of at least 40%, for example, at least 50%, 60%, 70% or 80%, preferably at least 90%, more preferably at least 95%, yet more preferably at least 98% and most preferably at least 99%. This applies to every composition detailed herein.
Furthermore, the pesticides that may be also used according to the invention, their preparation and their biological activity e. g. against harmful fungi, pests or weed is known (cf.: http://www.alanwood.net/pesticides/); these substances are mostly commercially available.
According to a further embodiment, the pesticide is selected from the group of the Inhibitors of complex Ill at Qo site (e.g. strobilurins). In particular, the pesticide is selected from the group consisting of azoxystrobin, coumethoxystrobin, coumoxystrobin, dimoxystrobin, enestroburin, fenaminstrobin, fenoxystrobin/flufenoxystrobin, fluoxastrobin, kresoxim-methyl, metominostrobin, orysastrobin, picoxystrobin, pyraclostrobin, pyrametostrobin, pyraoxystrobin, trifloxystrobin, 2-[2-(2,5-dimethyl-phenoxymethyl)-phenyl]-3-methoxy-acrylic acid methyl ester, 2-(2-(3-(2,6-dichlorophenyl)-1-methyl-allylideneaminooxymethyl)-phenyl)-2-methoxyimino-N-methyl-acetamide, pyribencarb, triclopyricarb/chlorodincarb, famoxadone and fenamidone.
According to still a further embodiment, the pesticide is selected from the group of the inhibitors of complex II (e. g. carboxamides). In particular, the pesticide is selected from the group consisting of benodanil, benzovindiflupyr, bixafen, boscalid, carboxin, fenfuram, fluopyram, flutolanil, fluxapyroxad, furametpyr, isofetamid, isopyrazam, mepronil, oxycarboxin, penflufen, penthiopyrad, sedaxane, tecloftalam, thifluzamide, N-(4′-trifluoromethylthiobiphenyl-2-yl)-3-difluoromethyl-1-methyl-1H-pyrazole-4-carboxamide, N-(2-(1,3,3-trimethyl-butyl)-phenyl)-1,3-dimethyl-5-fluoro-1H-pyrazole-4-carboxamide, 3-(difluoromethyl)-1-methyl-N-(1,1,3-trimethyl-indan-4-yl)pyrazole-4-carboxamide, 3-(trifluoromethyl)-1-methyl-N-(1,1,3-trimethylindan-4-yl)pyrazole-4-carboxamide, 1,3-dimethyl-N-(1,1,3-trimethylindan-4-yl)pyrazole-4-carboxamide, 3-(trifluoromethyl)-1,5-dimethyl-N-(1,1,3-trimethylindan-4-yl)pyrazole-4-carboxamide, 1,3,5-tri-methyl-N-(1,1,3-trimethylindan-4-yl)pyrazole-4-carboxamide, N-(7-fluoro-1,1,3-trimethyl-indan-4-yl)-1,3-dimethyl-pyrazole-4-carboxamide and N-[2-(2,4-dichlorophenyl)-2-methoxy-1-methyl-ethyl]-3-(difluoromethyl)-1-methyl-pyrazole-4-carboxamide.
In another form the pesticide comprises fluxapyroxad, difenoconazole, and propiconazole.
The pesticide is water-insoluble. Usually, it is soluble in water to not more than 1 g/l, preferably not more than 200 mg/l and in particular to not more than 50 mg/l at 25° C. Using simple preliminary experiments, the skilled worker can select a pesticide with a suitable water-solubility from the above pesticide list.
The pesticide can have a melting point of more than 40° C., preferably more than 70° C. and in particular more than 90° C.
The pesticide is preferably present in the concentrate in dissolved form. Using simple preliminary experiments, the skilled worker can select, from the above pesticide list, a pesticide with a suitable solubility.
In addition to the water-insoluble pesticide, the concentrate can comprise one or more further pesticides. The further pesticide is preferably water-insoluble. Usually, it is soluble in water to not more than 1 g/l, preferably not more than 200 mg/l and in particular not more than 50 mg/l at 25° C. Using simple preliminary experiments, the skilled worker can select a pesticide with a suitable water-solubility from the above pesticide list. In an especially preferred form, the concentrate does not comprise any further pesticide.
The concentrate may comprise from 0.1 to 60% by weight, preferably from 1 to 25% by weight, in particular from 5 to 15% by weight, of pesticide, the basis being the total of all the pesticides present in the concentrate.
The emulsifiable concentrate can furthermore comprise auxiliaries conventionally used for crop protection products. Suitable auxiliaries are surfactants, dispersants, emulsifiers, wetters, adjuvants, solubilizers, penetrants, protective colloids, stickers, thickeners, bactericides, antifreeze agents, antifoam agents, colorants, adhesives and binders.
Suitable surfactants are surface-active compounds, such as anionic, cationic, nonionic and amphoteric surfactants, block polymers, polyelectrolytes, and mixtures thereof. Such surfactants can be used as emusifier, dispersant, solubilizer, wetter, penetrant, protective colloid, or auxiliary. Examples of surfactants are listed in McCutcheon's, Vol. 1: Emulsifiers & Detergents, McCutcheon's Directories, Glen Rock, USA, 2008 (International Ed. or North American Ed.).
Suitable anionic surfactants are alkali, alkaline earth or ammonium salts of sulfonates, sulfates, phosphates, carboxylates, and mixtures thereof. Examples of sulfonates are alkylarylsulfonates, diphenylsulfonates, alpha-olefin sulfonates, lignine sulfonates, sulfonates of fatty acids and oils, sulfonates of ethoxylated alkylphenols, sulfonates of alkoxylated arylphenols, sulfonates of condensed naphthalenes, sulfonates of dodecyl- and tridecylbenzenes, sulfonates of naphthalenes and alkylnaphthalenes, sulfosuccinates or sulfosuccinamates. Examples of sulfates are sulfates of fatty acids and oils, of ethoxylated alkylphenols, of alcohols, of ethoxylated alcohols, or of fatty acid esters. Examples of phosphates are phosphate esters. Examples of carboxylates are alkyl carboxylates, and carboxylated alcohol or alkylphenol ethoxylates. Preferred anionic surfactants are sulfates and sulfonates.
Suitable nonionic surfactants are alkoxylates, N-substituted fatty acid amides, amine oxides, esters, sugar-based surfactants, polymeric surfactants, and mixtures thereof. Examples of alkoxylates are compounds such as alcohols, alkylphenols, amines, amides, arylphenols, fatty acids or fatty acid esters which have been alkoxylated with 1 to 50 equivalents. Ethylene oxide and/or propylene oxide may be employed for the alkoxylation, preferably ethylene oxide. Examples of N-substituted fatty acid amides are fatty acid glucamides or fatty acid alkanolamides. Examples of esters are fatty acid esters, glycerol esters or monoglycerides. Examples of sugar-based surfactants are sorbitans, ethoxylated sorbitans, sucrose and glucose esters or alkylpolyglucosides. Examples of polymeric surfactants are homo- or copolymers of vinylpyrrolidone, vinylalcohols, or vinylacetate. Preferred nonionic surfactants are alkoxylates. Nonionic surfactants such as alkoxylates may also be employed as adjuvants.
Suitable cationic surfactants are quaternary surfactants, for example quaternary ammonium compounds with one or two hydrophobic groups, or salts of long-chain primary amines.
Suitable amphoteric surfactants are alkylbetains and imidazolines.
Suitable block polymers are block polymers of the A-B or A-B-A type comprising blocks of polyethylene oxide and polypropylene oxide, or of the A-B-C type comprising alkanol, polyethylene oxide and polypropylene oxide.
Suitable polyelectrolytes are polyacids or polybases, wherein polyacdis are preferred. Examples of polybases are polyvinylamines or polyethyleneamines. Examples of polyacids are acrylic acid copolymers, or AMPS (2-acrylamido-2-methylpropane sulfonic acid) copolymers. Preferred polyelectrolyte is a copolymer, which contains in polymerized form an amide containing at least one monomer selected from N-vinyllactam, N—C1-C6 alkyl acrylamide and N,N-di-C1-C6 alkyl acrylamide; a poly(C2-6 alkylene glycol) (meth)acrylate and/or a mono C1-22 alkyl terminated poly(C2-6 alkylene glycol) (meth)acrylate; a C1-C8 alkyl (meth)acrylate; and (meth)acrylic acid. More preferred polyelectrolyte is a copolymer, which contains in polymerized form an amide containing at least one monomer selected from N-vinyllactam; a mono C1-22 alkyl terminated poly(C2-6 alkylene glycol) (meth)acrylate; a C1-C8 alkyl (meth)acrylate; and (meth)acrylic acid. In another preferred form the polyelectrolyte is a copolymer, which contains in polymerized form 25 to 85 wt % of an amide containing at least one monomer selected from N-vinyllactam; 1 to 40 wt % of a mono C1-22 alkyl terminated poly(C2-6 alkylene glycol) (meth)acrylate; 5 to 50 wt % of a C1-C8 alkyl (meth)acrylate; and up to 15 wt % of (meth)acrylic acid, wherein the sum of monomers equals 100%. In another preferred form the polyelectrolyte is a copolymer, which contains in polymerized form 30 to 85 wt % of an amide containing at least one monomer selected from N-vinyllactam; 5 to 20 wt % of a mono C1-22 alkyl terminated poly(C2-6 alkylene glycol) (meth)acrylate; 8 to 35 wt % of a C1-C8 alkyl (meth)acrylate; and 0.5 to 10 wt % of (meth)acrylic acid, wherein the sum of monomers equals 100%. In another preferred form the polyelectrolyte is a copolymer, which contains in polymerized form at least one ethylenically unsaturated monomer containing sulfonic acid groups, at least one monomer selected from C1-C4 alkyl (meth)acrylates, and at least one monomer selected from C6-C22 alkyl (meth)acrylates. In another preferred form the polyelectrolyte is a copolymer, which contains in polymerized form 5% to 50% by weight of at least one ethylenically unsaturated monomer containing sulfonic acid groups, 20% to 70% by weight of at least one monomer selected from C1-C4 alkyl (meth)acrylates, and 5% to 30% by weight of at least one monomer selected from C6-C22 alkyl (meth)acrylates, based on the total weight of the monomers. The concentrate may comprise from 0.5 to 40% by weight, preferably from 2 to 30% by weight, and in particular from 5 to 25% by weight of the polyelectrolye (e.g. the polyacid, like acrylic acid copolymers, or AMPS copolymers).
Suitable adjuvants are compounds which have negligible or even no pesticidal activity themselves, and which improve the biological performance of the pesticide on the target. Examples are surfactants, mineral or vegetable oils, and other auxiliaries. Further examples are listed by Knowles, Adjuvants and Additives, Agrow Reports DS256, T&F Informa UK, 2006, chapter 5.
Suitable bactericides are bronopol and isothiazolinone derivatives such as alkylisothiazolinones and benzisothiazolinones. Suitable antifreeze agents are ethylene glycol, propylene glycol, urea and glycerol. Suitable antifoam agents are silicones, long-chain alcohols, and salts of fatty acids. Suitable colorants (e.g. in red, blue, or green) are pigments which are sparingly soluble in water, and water-soluble dyes. Examples are inorganic colorants (e.g. iron oxide, titanium oxide, iron hexacyanoferrate) and organic colorants (e.g. alizarin, azo and phthalocyanine colorants).
The concentrate preferably comprises at least one anionic surfactant. The concentrate usually comprises not less than 0.03% by weight of anionic surfactants, preferably not less than 0.1% by weight and in particular not less than 0.5% by weight. The composition can comprise not more than 25% by weight of anionic surfactants, preferably not more than 10% by weight and in particular not more than 5% by weight.
The concentrate preferably comprises at least one nonionic surfactant (such as alkoxylates). The concentrate usually comprises not less than 1% by weight of nonionic surfactants, preferably not less than 5% by weight and in particular not less than 10% by weight. The composition can comprise not more than 65% by weight of nonionic surfactants, preferably not more than 45% by weight and in particular not more than 35% by weight.
In a preferred form, the concentrate preferably comprises at least one alkoxylate, in particular an alkoxylated C6-C22-alcohol. The concentrate usually comprises not less than 2% by weight of alkoxylates (in particular an alkoxylated C6-C22-alcohol), preferably not less than 7% by weight and in particular not less than 9% by weight.
Preferably, the concentrate comprises a nonionic surfactant (such as alkoxylates) and an anionic surfactant (such as sulfates or sulfonates).
The invention furthermore relates to a process for the preparation of the emulsifiable concentrate according to the invention by mixing the water-insoluble pesticide, the alkyl lactate, the lactamide of the formula (I), and optionally the amide of the formula (II).
The invention furthermore relates to an emulsifiable concentrate comprising the water-insoluble pesticides fluxapyroxad, difenoconazole, and propiconazole. The concentrate may comprise further pesticides in addition to these three pesticides. The emulsifiable concentrate may comprise 5 to 300 g/l (preferably 15 to 200 g/l) fluxapyroxad, 30 to 500 g/l (preferably 100 to 350 g/l) difenoconazole, and 30 to 500 g/l (preferably 100 to 350 g/l) propiconazole. The emulsifiable concentrate comprising fluxapyroxad, difenoconazole, and propiconazole may further comprise auxiliaries conventionally used for crop protection products. The emulsifiable concentrate comprising fluxapyroxad, difenoconazole, and propiconazole may further comprise the alkyl lactate and the lactamide of the formula (I). The emulsifiable concentrate comprising fluxapyroxad, difenoconazole, and propiconazole may have preferred features as those disclosed for the emulsifiable concentrate comprising the water-insoluble pesticide, the alkyl lactate and the lactamide of the formula (I).
The invention furthermore relates to an emulsion obtainable (preferably obtained) by mixing water and the emulsifiable concentrate according to the invention. The emulsion normally arises spontaneously upon mixing. In most cases, the emulsion is an oil-in-water emulsion. The mixing ratio of water to concentrate can be in the range of from 1000 to 1 up to 1 to 1, preferably 200 to 1 up to 3 to 1.
The invention furthermore relates to a method for controlling phytopathogenic fungi and/or undesired vegetation and/or undesired attack by insects or mites and/or for regulating the growth of plants, where the concentrate according to the invention or the emulsion according to the invention is allowed to act on the respective pests, their environment or on the crop plants to be protected from the respective pests, on the soil and/or on undesired plants and/or on the crop plants and/or their environment. In general, the therapeutic treatment of humans and animals is excluded from the method for controlling phytopathogenic fungi and/or undesired vegetation and/or undesired attack by insects or mites and/or for regulating the growth of plants.
When employed in crop protection, the application rates of the pesticides amount to from 0.001 to 2 kg per ha, preferably from 0.005 to 2 kg per ha, especially preferably from 0.05 to 0.9 kg per ha and in particular from 0.1 to 0.75 kg per ha, depending on the nature of the desired effect. In treatment of plant propagation materials such as seeds, e. g. by dusting, coating or drenching seed, amounts of active substance of from 0.1 to 1000 g, preferably from 1 to 1000 g, more preferably from 1 to 100 g and most preferably from 5 to 100 g, per 100 kg of plant propagation material (preferably seed) are generally required. When used in the protection of materials or stored products, the amount of active substance applied depends on the kind of application area and on the desired effect. Amounts customarily applied in the protection of materials are 0.001 g to 2 kg, preferably 0.005 g to 1 kg, of active substance per cubic meter of treated material.
Various types of oils, wetters, adjuvants, fertilizers or micronutrients and further pesticides (for example herbicides, insecticides, fungicides, growth regulators, safeners) may be added to the emulsion in the form of a premix or optionally only shortly before use (tank mix). These agents can be admixed to the compositions according to the invention at a weight ratio of from 1:100 to 100:1, preferably from 1:10 to 10:1.
The user applies the composition according to the invention usually from a predosage device, a knapsack sprayer, a spray tank, a spray plane, or an irrigation system. Usually, the agrochemical composition is made up with water, buffer, and/or further auxiliaries to the desired application concentration and the ready-to-use spray liquor or the agrochemical composition according to the invention is thus obtained. Usually, 20 to 2000 liters, preferably 50 to 400 liters, of the ready-to-use spray liquor are applied per hectare of agricultural useful area.
Advantages of the present invention are, inter alia, that the concentrate is highly stable to low temperatures (e.g. even below 0° C.); that the pesticide does not precipitate, cream or crystallize in the concentrate at low temperatures (e.g. even below 0° C.); that the pesticide does not precipitate, cream or crystallize in the emulsion obtained from the concentrate, e.g. at low temperatures (e.g. even below 0° C.); that high pesticide concentrations in the concentrate can be employed; that an emulsion forms spontaneously upon dilution of the concentrate with water; that the concentrate is capable of being stored over prolonged periods; that the concentrate does not require the presence of water (e.g. because it might freeze below 0° C. or would favor bacterial growth during storage); that the concentrate forms a stable emulsion upon dilution with water; that adjuvants (such as alcohol alkoxylates) can be included in the concentrate formulations, e.g. even in high concentrations; that the pesticide in the emulsion obtained from the concentrate does not clog any spraying filters or nozzles, e.g. at low temperatures, or when diluted with hard water.
The examples which follow illustrate the invention without imposing any limitation.
The emulsifiable concentrates of Pesticide A (each 100 g/l) were prepared by mixing the components as indicated in Table 1 (where each composition contained 200 g/l Polymer A, 10 g/l AS1, 40 g/l NS1, 50 g/l NS2) and filling up to a total volume of 1.0 l with Fatty Amide A. The compositions were clear solutions and are summarized in Table 1.
One liter of each prepared EC formulation was placed in a refrigerator at −10° C. After 3 days storage in the refrigerator, the formulations were seeded with the respective pesticide crystals (less than 0.1 g/l). Twelve days after seeding the samples were observed for the crystallization of pesticide. Samples which did not show any crystals other than the added seed crystals were marked “Stable”. Samples which showed crystals other than the added seed crystals were marked “Crystals”.
One liter of each formulation was stored at room temperature for four hours after preparation. The formulations were seeded with the respective pesticide crystals (less than 0.1 g/l). The samples were observed for crystallization 24 hours after seeding. Samples which did not show any crystals other than the added seed crystals were marked “Dissolved”. Samples which showed crystals other than the added seed crystals were marked “Crystals”.
The test below was used to investigate whether the emulsifiable concentrates, following dilution to a sprayable concentration, can be used in standard sprayers without clogging the filters of the spraying machine or the spraying nozzles.
The test machine was a hydraulic sprayer with a 195 l tank, a four-piston membrane pump (at 3 bar pressure) and a spraying lance with 6 standard nozzles (type: LU 90-03). Nozzle filters used were four mesh filters (25, 50, 60, and 80 mesh), a 60-mesh mesh filter with integrated seal, and a 25-mesh slot filter. The suction filter and the pressure filter were each 50-mesh mesh filters.
The tank was first filled with 75 l of water and thereafter one liter of an emulsifiable concentrate. The mixture was mixed with a piston pump (stirring intensity: about 45 l/min) and subsequently the tank was filled up with a further 75 l of water. After pumped circulation for 120 minutes (stirring 5 intensity: about 45 l/min) of the product mixture, the spray solution was sprayed out of the tank through the nozzles. During the test, the temperature of the spray mixture in the tank was kept constant at between 5 and 10° C. in order to simulate cold well water. The delivery test was repeated 4 times without cleaning the instruments between each application.
After 120 minutes of circulation, last filling (4th) was left in the tank for additional 16 hours without stirring. After the standing time, the mixture was circulated additional 30 minutes, and then sprayed.
At the end of this procedure, the filters ahead of and downstream of the pump (suction filter 10 and pressure filter) and the filters in the nozzles (nozzle filters) were examined for residues.
In the tables “clogged” means that at least one of the filters (suction, pressure or nozzle filters) showed significant fouling, causing a reduction in flow or clogging. “Free” in the table means that no significant fouling was found, and “-” means that the sample was not tested.
The emulsifiable concentrates of Pesticide A and pyraclostrobin (each 100 g/l) were prepared by mixing the components as indicated in Table 2 (where each composition contained 100 g/l Polymer A, 100 g/l NS2, 100 g/l NS3, 50 g/l NS5, and 30 g/l NS4) and filling up to a total volume of 1.0 l with Fatty Amide A. The compositions were clear solutions. The samples were tested for “Active Solubility”, “Applicability” and “Cold Stability” as described in Example 1.
The emulsifiable concentrates of Pesticide B (133 g/l) were prepared by mixing the components as indicated in Table 3 (where each composition contained 100 g/l Polymer A, 100 g/l NS2, 100 g/l NS3, 70 g/l NS5, and 40 g/l NS4) and filling up to a total volume of 1.0 l with EHL. The compositions were clear solutions. The samples were tested for “Active Solubility”, “Applicability” and “Cold Stability” as described in Example 1.
The emulsifiable concentrates of Pesticide A and pyraclostrobin (each 100 g/l) were prepared by mixing the components as indicated in Table 4 (where each composition contained 50 g/NS5, 30 g/l NS4, 100 g/l NS2, 100 g/l NS3, and 100 g/l Polymer A). The samples were tested for “Active Solubility”, “Applicability” and “Cold Stability” as described in Example 1.
a) not according to the invention
The emulsifiable concentrates of Pesticide B (each 133 g/l) were prepared by mixing the components as indicated in Table 5 (where each composition contained 70 g/NS5, 40 g/l NS4, 100 g/l NS2, 100 g/l NS3, and 100 g/l Polymer A). The samples were tested for “Active Solubility”, “Applicability” and “Cold Stability” as described in Example 1.
a) not according to the invention
The emulsifiable concentrates of fluxapyroxad (each 30 g/l), pyraclostrobin (each 200 g/l) and propiconazole (each 125 g/l) were prepared by mixing the components and filling up to a total volume of 1.0 l with EHL as indicated in Table 6. The samples were tested for “Active Solubility”, “Applicability” and “Cold Stability” as described in Example 1.
The emulsifiable concentrates of Pesticide A (each 100 g/l) and propiconazole (each 125 g/l) were prepared by mixing the components and filling up to a total volume of 1.0 L with EHL as indicated in Table 7. The samples were tested for “Active Solubility”, “Applicability” and “Cold Stability” as described in Example 1.
| Number | Date | Country | Kind |
|---|---|---|---|
| 14155255.4 | Feb 2014 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2015/052256 | 2/4/2015 | WO | 00 |
