Fungicidal composition on the basis of tebuconazole

 

(57) Abstract:

The invention relates to plant protection, namely the preparation, fungicidal, where the active component is tebuconazole. The purpose of this invention is to improve the stability during storage and the ability to maintain its properties at getting a working solution for a long time, and ease of manufacture. This goal is achieved through the use of fungicidal composition in the form of a microemulsion consisting of an organic phase comprising tebuconazole as the active component and the emulsifier and water-insoluble solvent, and the aqueous phase comprising water, a diatomic alcohol and dye. As the emulsifier used the ethoxylated muistiinpanoista or ethoxylated vegetable oil, or an ethoxylated tridirectional, and as a solvent is a liquid amides of higher carboxylic acids, or cyclohexanone or acetophenone, or a mixture of the above solvents, and the ratio of organic phase to water is(1-2,33):(1-11,5). 1 table.

The invention relates to plant protection, namely to the drug, with party on the basis of tebuconazole [(RS)-4,4-dimethyl-3-(1H-1,2,4-terazol-1-ylmethyl)-1-n-chloraniline-3-ol] as wetting powders - Raxil and Agrosil, in the form of a suspension concentrate - Raxil, in the form of an emulsion concentrate - Folicur /Handbook of pesticides and agrochemicals permitted for use on the territory of the Russian Federation/.

To broaden the spectrum of action and enhance the biological activity of tebuconazole use in a variety of mixed preparations (U.S. Pat. Of the Russian Federation No. 2024228, 2192743, 2040899). For example, in patent No. 2040899 described emulsifiable concentrate on the basis of two active compounds of tebuconazole and 4-(2,2-debtor-1,3-benzodioxol-7-yl)-1H-pyrrol-carbonitrile containing OK-tylenolpoisoningincats ether, dodecylbenzenesulfonate calcium, glycol ether of castor oil, cyclohexanone, the mixture of xylenes. In patent No. 2024228 described fungicidal composition in the form of an emulsion concentrate on the basis of a mixture of propiconazole with tebuconazole containing octylphthalate-longicollis ether, dodecylbenzenesulfonate calcium, polietilenglikolya ether of castor oil, tributylphosphorotrithioate ether, cyclohexanone, the mixture of dimethylbenzyl.

Most preferred for use in agriculture are drugs in liquid form, as they do not produce dust in the formation of a working solution that reduces toxicity and increases besorah) those drugs, the particle size of the active substance in which the working fluid is minimal. From this point of view the efficiency of preparative liquid form of systemic fungicides increased in the range: concentrates, suspension emulsion <microemulsions <true solutions.

Known fungicidal composition on the basis of tebuconazole-containing copolymer of vinylpyrrolidone, an organic solvent, a nonionic surfactant and water (U.S. Pat. RF 2138525). In this patent as the use of surfactants nonionic, cationic emulsifiers. As the surfactant can be applied complex polyoxyethylenic a fatty acid ester, a simple polyoxyethylene ether of fatty alcohol series, simple alkylarylsulphonates ether, alkyl sulphonates, alkyl sulphates, alkylarylsulfonate and arylsulfatase. As a solvent, you can use polar and non-polar solvents, such as propylene glycol, polyethylene glycol, ketones (methyl isobutyl ketone, cyclohexanone), amides (dimethylformamide), cyclic compounds (N-organic N-methylcaprolactam and butyrolactone), strongly polar solvents (dimethylsulfoxide), aromatic hydrocarbons (xylene), esters (acetate simple nanometrology ether of propylene glycol, complex disutility the Nol, propanol and others). The disadvantage of this composition is insufficient stability during long time storage (the storage time of the composition is determined by several days).

The biological activity of the drug can be increased either by introducing additional active drug compounds, or by creating more efficient preparative form, is able to provide better contact of the drug with the plant due to more efficient penetration of the fungicide in the cuticle of plants. Such forms include microemulsions, which are transparent or opalescense liquids and are characterized by a droplet size less than 0.1 microns, which provides a fast and efficient penetration into the plant.

The closest technical solution to the claimed composition is fungicidal composition in the form of a microemulsion consisting of an organic phase comprising as an active ingredient triazolopyridine connection and financialpolicy ether and insoluble in water, organic solvent and aqueous phase comprising water, organic solvent and surfactant (U.S. Pat. U.S. No. 6494941). As triazolopyridine is being, contains as solvent 1,2-propeciageneric, 3-methyl-3-methoxybutanol, ethyl acetate, aliphatic, cycloaromatization and aromatic hydrocarbons, and so forth, as emulsifier financialpolicy ether, ethoxypropylamine polyarylenes, alkoxysilane fatty amines, alkoxysilane fatty alcohols, alkylbenzenesulfonate and so on. The aqueous phase, in addition to water, contain surfactants (alkoxysilane condensate of aromatic HE-containing compounds with formaldehyde and NH-functional groups, borates, carbonates, Coccinellidae connection alkoxysilane fatty alcohols, etc.) and as solvents aliphatic C1-C4-alcohols, aliphatic ketones (acetone, methyl ethyl ketone, N-organic, diatomic alcohols (propylene glycol, diethylene glycol, 1,5-pentanediol), etc. The patent proposes a method of obtaining macro-, mini - and microemulsions using high-pressure homogenizers, jet or ultrasonic dispersers. The resulting products have a high stability in storage and are designed for fungicidal wood impregnation. These compounds, having a good stabilnego expensive equipment for the preparation of macro-, mini - and microemulsions, expensive.

The purpose of this invention is to improve the stability during storage and the ability to maintain its properties at getting a working solution for a long time, and ease of manufacture. The biological activity of the drug through the creation of a microemulsion with a particle size less than 0.1 μm, providing a fast and efficient penetration of the fungicide into the protected object is kept at a high level.

This goal is achieved through the use of fungicidal composition in the form of a microemulsion consisting of an organic phase comprising tebuconazole as the active component and the emulsifier and water-insoluble solvent, and the aqueous phase comprising water, a diatomic alcohol and dye. As the emulsifier used the ethoxylated muistiinpanoista, or ethoxylated vegetable oil, or an ethoxylated tridirectional, and as a solvent is a liquid amides of higher carboxylic acids, or cyclohexanone or acetophenone, or a mixture of the above solvents, and the ratio of organic phase to water is(1-2,33):(1-11,5) in the following ratio of components, %:

The aqueous phase

Diatomic alcohol 3-20

Dye 1-5

Water the Rest up to 100%

Examples illustrating the claimed technical solution.

Example 1

Into the reaction flask for preparing the organic phase load estimated amount of solvent (N,N-dimethyldecanamide), tebuconazole and emulsifier (ethoxylated soybean oil), the mixture is stirred at a temperature of 40C for 10 minutes In another flask to prepare the aqueous phase load, the calculated amount of water and ethylene glycol as the organic solvent and a water-soluble dye. While heating and stirring the organic phase add portions of the aqueous phase when the claimed ratio of organic phase to water. The resulting product is a clear viscous liquid. When mixed with water forms a transparent or opalescent mobile liquid.

As the colorant used the following water-soluble dyes: Bassol Rot 76L company Bayer (example 1), domestic dyes Rhodamine B (example 2), Rhodamine 2 (example 3). The table below shows the resulting structures and their characteristics.

Stability of working reagent was studied in dynamics. have not changed their appearance: 've never seen bundle, no precipitation of crystals.

Fungicidal composition in the form of a microemulsion consisting of an organic phase comprising tebuconazole as the active component and the emulsifier and water-insoluble solvent, and the aqueous phase comprising water, a diatomic alcohol and dye, characterized in that the emulsifier used the ethoxylated muistiinpanoista, or ethoxylated vegetable oil, or an ethoxylated tridirectional, and as a solvent is a liquid amides of higher carboxylic acids, or cyclohexanone or acetophenone, or a mixture of the above solvents, and the ratio of organic phase to water is(1-2,33):(1-11,5) in the following ratio of components, %:

Organic phase:

Active component tebuconazole 1-20

Emulsifier 4-30

The solvent 3-40

The aqueous phase

Diatomic alcohol 3-20

Dye 1-5

Water the Rest up to 100%

 

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FIELD: plant protection.

SUBSTANCE: method is characterized by that grain-crops in vegetation phase are treated with methylheptenone in amounts 100 to 500 ml/ha.

EFFECT: reduced stress effects on plants.

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