MXPA98006555A - Best fungicide composition - Google Patents

Abstract

The present invention relates to a composition having better fungicidal properties and containing tebuconazole and an alkali metal dialkylsulfosuccinate.

Description

IMPROVED FUNGICIDE COMPOSITION BACKGROUND OF THE INVENTION The present invention relates to an improved fungicidal composition and to the use of that composition in the treatment of plants. Of particular interest is the known fungicide a- (2- (4-chlorophenyl) ethyl) -a- (1, 1- dimethylethyl) -1H-1,2, -triazole-1-ethanol (also referred to as "tebuconazole"). See, for example, US Patent 4,723,984. It is known to include certain surfactants in fungicidal formulations to promote the dispersion of the active component in a liquid medium. Among the most commonly used surfactants in formulations fungicides are lignin sulfonates, sulfonated naphthalene and formaldehyde condensates. These surfactants are typically included in amounts of less than 5% by weight, based on the total weight of the formulation. Other known surfactants are the esters of the sulfodicarboxylic acids and their salts (see, for example, US Patents 2,176,423 and 27028,091) and the commercial alkali metal dialkylsulfosuccinates of the Cyetc group of American Cyanamid companies (sold under the trademark Aerosol). These esters have an extraordinary wetting power in various emulsions and aqueous suspensions. It is an object of the present invention to provide a fungicidal composition with better efficacy. It is also an object of the present invention to provide a The method for treating plants with a fungicidal composition that contains less active components without sacrificing its efficacy as a foliar treatment. DESCRIPTION OF THE INVENTION The present invention is directed to a composition having improved fungicidal properties, consisting of: a) from about 10 to about 70% by weight of a- (2- (4-chlorophenyl) ethyl) -a- (1, 1) -dimethylethyl) -1H-1,2,4-triazole-1-ethanol (or tebuconazole) and b) from about 30 to about 90% by weight of a dialkylsulfosuccinate of -ft alkali metal, equaling said percentages 100%. This composition can be provided in the form of a concentrate for use as a fungicidal composition. Preferably, however, the composition is in the form of a formulated suspension which is then used on the plant to be protected in particular. The preferred composition has improved fungicidal properties and consists of: a) from 10 to 40% by weight of tebuconazole, 20 b) from 10 to 40% by weight of the dialkylsulfo • * alkali metal succinate, c) from 15 to 45% by weight of an inert liquid diluent and d) from 5 to 15% by weight of a 25% nonionic surfactant, said percentages equaling 100%. In the most preferred embodiment, the composition also contains from 0.0 to 1.5% by weight, based on the total weight of the composition, of an antifoam agent. As can be seen, the surfactants necessary for optimum efficiency are incorporated into the formulation without the need for additional surfactant addition.

The active component used in the compositions of the present invention is a- (2- (4-chlorophenyl) ethyl) -a- (1,1-dimethylethyl) -1H-1,2,4-triazole-1-ethanol, which is commonly called tebuconazole. Methods for preparing this active component are known. See, for example, US Pat. 4,723,984, which is incorporated herein by reference. The other critical component of the compositions of the present invention is an alkali metal w9Pio dialkylsulfosuccinate. These sulfosuccinates are known and described in Patents 2,028,091 and 2,176,423, the descriptions of which are hereby incorporated by reference. The preferred alkali metal is sodium. Specific examples of suitable alkali metal dialkylsulfosuccinates include: sodium bistridecylsulfosuccinate, sodium dioctyl sulfosuccinate, sodium dihexylsulfosuccinate, sodium dicyclohexylsulfosuccinate, sodium diamyl sulfosuccinate, sodium diisobutylsulfosuccinate and the like. The compositions of the present invention can be used in the form of a dry or liquid concentrate. When supplied in dry or concentrate form, these compositions generally consist of a) from about 10 to about 70% by weight and, preferably, from about 20 to about 55% by weight of tebuconazole and b) from about 30 to about 90% by weight and, preferably, from about 45 to about 80% by weight of the sulfosuccinate, said percentages equaling 100%. The most It is preferred to use tebuconazole and sulfosuccinate in approximately equal amounts. As noted, it is preferred to use the compositions in the form of suspensions. If used in the form of suspensions, the compositions require the use of inert liquid diluents and nonionic surfactants. More specifically, the preferred composition consists of: a) from 10 to 40% by weight (and, preferably, from 20 to 30% by weight) of tebuconazole, b) from 10 to 40% by weight of sulfosuccin to, c) from 15 to 45% by weight of an inert liquid diluent and d) from 5 to 15% by weight (and, preferably, from 8 to 12% by weight) of a surfactant non-ionic, equaling the percentages 100%. The composition may also contain from 0.0 to 1.5% by weight of an antifoaming agent (and, preferably, from 0.1 to 1% by weight), based on the total weight of the composition. Useful inert liquid diluents herein are known and used in the art and include hydrocarbon-j. Aromatic hydrocarbons (such as benzene, xylene, toluene or alkylnaphthalenes), chlorinated or chlorinated aliphatic aromatic hydrocarbons (such as chlorobenzenes, chloroethylenes or methylene chloride), aliphatic or alicyclic hydrocarbons (such as cyclohexane or paraffins), alcohols (such as methanol, butanol, ethylene glycol, propylene glycol or glycerin), ethers, ether alcohols, ketones (such as acetone, methyl ethyl ketone, methyl isobutyl ketone or cyclohexane), strongly polar solvents (such as dimethyl sulfoxide) and water. It is also possible to use mixtures of the previous diluents. In the most preferred embodiment, a mixture of propylene glycol and water is used. The nonionic surfactants useful herein are also known and used in the art. Specific examples of useful nonionic surfactants include polyethylene oxide ethers of fatty alcohols, alkylaryl polyglycol ethers, ethoxylated alcohols, ethoxylated / propoxylated block polymers and sorbitan or sugar ethoxylates. A particularly preferred surfactant can be purchased commercially from Union Carbide under the trademark Triton X-100, an ethoxylated octylphenol. Although not essential, other known additives may be included in the compositions of the present invention. As is known in the art, polydimethylsiloxanes and polydimethyl / diphenylsiloxane copolymers are useful blowing agents. In order to prepare the compositions of the present invention, the individual components are generally mixed by first adding tebuconazole and then adding, in order, the sulfosuccinate, the non-ionic surfactant, the diluent and the antifoaming agent (if used). In the practice of the invention, the compositions are typically applied in proportions of from about 20 to about 300 grams of active component (C.A.) per hectare, preferably from about 60 to about 250 grams per hectare, according to techniques well known in the art. The compositions of the present invention are particularly effective in the control of powdery mildew on grass and grains, grapes and other crop plants, late leaf spots, peanut mold, dollar spot on the lawn, copper stain on the lawn and various diseases of molds of the sown, blast and snow on the lawn.

# Having thus described the invention, the following Examples are given as illustrative thereof. All parts and percentages given in these Examples are parts by weight and percentages by weight, unless otherwise indicated thing. EXAMPLES EXAMPLES 1-8 Tebuconazole, an alkali metal dialkylsulfosuccinate, water, propylene glycol, ßfiO octylphenol ethoxylate [Triton X-100) and dimethylpiolisiloxane [Sag 10] of "OSi Specialties" were combined in the amounts indicated in Table 1. Powdered then each of the resulting compositions at a concentration of 63 g / hectare, 125 g / hectare and 250 g / hectare on wheat plants of three 15 leaves in a greenhouse as a foliar spray using a conveyor belt sprayer. treated were then evaluated for their effectiveness in the control of powdery mildew over a period of 28 days, the results are given in Table 2. to the results obtained, the effect was checked visually and evaluated with a number from 0 to 100%. The visual check / assessment was repeated three times and the average of the three visualizations was given. The alkali metal dialkylsulfosuccinates used in the following Examples were as follows: SULFOSUCCINATE A: Sodium bistridecylsulfosuccinate as 70% anionic liquid marketed by American Cyanamid under the designation Aerosol TR-70. 30 SULFOSUCCINATE B: Sodium dioctylsulfosuccinate in the form of anionic active powder 85% commercialized under the name Aerosol OT-B by American Cyanamid. SULFOSUCCINATE C: Sodium dioctyl sulfosuccinate in the form of a 100% anionic wax marketed under the name Aerosol OT-100 5 by American Cyanamid. SULFOSUCCINATE D: Sodium dioctyl sulfosuccinate in the form of 70% anionic liquid in propylene glycol and water, marketed by American __ Cyanamid under the name Aerosol ;? ^ 0 OT-70PG. ~~~ SULFOSUCCINATE E: Sodium dihexylsulfosuccinate in the form of 80% anionic liquid marketed by American Cyanamid under the name Aerosol MA-80. 15 SULFOSUCCINATE F: Sodium dicyclohexylsulfosuccinate in the form of anionic pellets 85% traded by American Cyanamid under the name Aerosol A-196. SULFOSUCCINATE G: Sodium diamyl sulfosuccinate in the form of anionic wax solid sold under the name Aerosol AY-100 by American Cyanamid. SULFOSUCCINATE H: sodium diisobutylsulfosuccinate in the form of a 45% anionic liquid marketed by American 25 Cyanamid under the name Aerosol IB-45.

* TABLE 1 # TABLE 2% Control # Although the invention has been described in detail in the foregoing for purposes of illustration, it is to be understood that such detail has that purpose only and that those skilled in the art can make variations therein without departing from the spirit and scope of the invention, except in what may be limited by the claims. * •

Claims (10)

1. CLAIMS 1. A composition having better fungicidal properties, consisting of: a) from 10 to 70% by weight of a- (2- (4-chlorophenyl) ethyl) -a- (1,1-dimethylethyl) -1H- 1, 2, 4-triazol-l-ethanol and b) from 30 to 90% by weight of an alkali metal dialkylsulphosuccinate, said percentages equaling 100%. L0
2. 2. The composition of Claim 1, < where component a) is present in an amount of 20 to 55% by weight and component b) is present in an amount of 45 to 80% by weight.
3. 3. The composition of Claim 2, wherein components a) and b) are present in equal amounts.
4. 4. The composition of Claim 1, wherein the alkali metal dialkylsulfosuccinate is selected from the group consisting of Sodium bistridecyl sulfosuccinate, sodium dioctyl sulfosuccinate, sodium dihexylsulfosuccinate, sodium dicyclohexylsulfosuccinate, sodium diamyl sulfosuccinate and sodium diisobutylsulfosuccinate.
5. 5. The composition of Claim 4, wherein the alkali metal dialkylsulfosuccinate is sodium dioctylsulfosuccinate.
6. 6. A suspension consisting of: a) from 10 to 40% in-weight of a- (2- (4-chloro-phenethyl) ethyl) -a- (1,1-dimethylethyl) -1H-30"1 , 2,4-triazole-1-ethanol, b) from 10 to 40% by weight of an alkali metal dialkylsulphosuccinate, c) from 15 to 45% by weight of an inert liquid diluent, d) from 5 to 15% by weight of a nonionic surfactant and e) 0.0 to 1.5% by weight of an antifoaming agent, 5 equaling said percentages 100%
7. 7. The suspension of Claim 6, where component a) is present in an amount of 20 to 30% by weight, component d) is present in an amount of 8 to 12% by weight and component e) is present in an amount of 0.5 to 1% by weight. já *
8. 8. A process for the control of fungi in a plant consisting in applying a liquid composition to said plant, whose composition consists of: a) from 10 to 40% in weight of a- (2- (4- 15 chloro-phenyl) ethyl) -a- (1,1-dimethylethyl) -1H- 1,2 , 4-triazole-1-ethanol, b) from 10 to 40% by weight of an alkali metal dialkylsulphosuccinate, c) from 15 to 45% by weight of a diluent 20 inert liquid,. { JÉÉ * d) from 5 to 15% by weight of a nonionic surfactant and e) from 0,0 to 1,5% by weight of an antifoaming agent, 25 equaling said percentages 100%.
9. 9. The method of Claim 8, wherein the liquid composition is applied to the plant by spraying.
10. 10. The method of Claim 9, Wherein the alkali metal dialkylsulfosuccinate is selected from the group consisting of sodium bistridecyl sulphosuccinate, sodium dioctyl sulfosuccinate, sodium dihexylsulfosuccinate, sodium dicyclohexylsulfosuccinate, sodium diamyl sulfosuccinate and sodium diisobutylsulfosuccinate.