RU2497362C1 - Herbicidal composition (versions) and method of its obtaining - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture. Herbicidal composition contains clethodim in form of trialkylamine salt, which contains in one of alkyl radials not fewer than eight atoms of carbon, and tribenuron-methyl in form of trialkylamine salt, which contains in one of alkyl radials not fewer than eight atoms of carbon. Composition contains surface-active substance of nonionic type. Herbicidal composition is obtained by mixing components with the following components ratio, wt %: clethodim 15-40, tribenuron-methyl 5-30, trialkulamine, which contains in one of alkyl radials not fewer than eight atoms of carbon 15-60, surface-active substance of nonionic type 20-40, aromatic solvent 5-15.

EFFECT: invention makes it possible to increase efficiency of composition in crops of sunflower, resistant to tribenuron-methyl, with respect to monocotyledonous and dicotyledonous weed plants.

10 cl, 7 ex, 2 tbl

Description

This invention relates to agriculture and can be used to protect crops resistant to the action of tribenuron-methyl sunflower from dicotyledonous and monocotyledonous (Cereal family) weeds.

A technical solution is known for the use of tribenuron-methyl in the “Express” preparation in the form of water-dispersible granules (VDG) for the destruction of dicotyledonous weeds in genetically modified sunflower crops (List of pesticides and agrochemicals approved for use in the Russian Federation. M., 2011, P.365 Appendix to the journal “Protection and Quarantine of Plants”, No. 6, 2011).

It is also known the use of the drug "Select", cell-based CE for the protection of conventional sunflower crops from cereal type of clogging (List of pesticides and agrochemicals permitted for use in the Russian Federation. M., 2011, P.309. Appendix to the magazine "Protection and Quarantine plants ”No. 6, 2011).

It is obvious that these two preparations can cover the entire spectrum of possible weeds (dicotyledonous and monocotyledonous (Cereal family) in crops of sunflower resistant to tribenuron-methyl.

Despite certain technical difficulties, this technical solution has the right to exist. The main drawback of this approach is the unsatisfactory quality of the working fluid used for spraying, which is a classic oil-in-water emulsion with dispersed phase droplets ranging in size from 3 to 10 microns when using the Select drug, CE and a suspension of tribenuron methyl in water when using EDC tribenuron-methyl.

At the same time, it is well known (NF Dunsky et al. Pesticidal aerosols. M .: Nauka, 1982) that the biological effectiveness of the same active substance of a pesticide depends on the size of the dispersed phase of the working fluid, which is interconnected with the physical state (molecularly dissolved, emulsion, suspension) of the active substance in the working fluid.

Known herbicidal composition (RU 2446685, publ. 04/10/2012), including celodime in a modified form - in the form of a trialkylamine salt containing at least eight carbon atoms in one of the alkyl radicals, a nonionic type surfactant and coherbicide.

The objective of the present invention is to provide a combined herbicidal preparation based on celodime and tribenuron-methyl, which makes it possible to obtain working fluids based on it, the size of the dispersed phase of which is in the nanoscale range, as well as expanding the spectrum of action of the drug in relation to weeds.

The problem is achieved in that the active substances of the herbicidal composition: celodime and trebunuron-methyl are presented in the form of modifications having surface-active properties. Forms of modifications are trialkylamine salts in which one of the alkyl radicals contains at least eight carbon atoms. The herbicidal composition contains a non-ionic type surfactant, and additionally an aromatic solvent.

The herbicidal composition contains components in the following ratio,% wt.

Trialkylamine salt of cellodymium 25-66 Tribenuron methyl trialkiamine salt 9-35 Nonionic Type Surfactant 20-40 Aromatic solvent 5-15

The task is also achieved by the fact that the herbicidal composition contains components in the following ratio,% wt:

Cletodim 15-40 Tribenuron methyl 5-30 Trialkylamine containing in one of the alkyl radicals of at least eight atoms 15-60 Nonionic Type Surfactant 20-40 Aromatic solvent 5-15,

in this case, when the components are mixed, trialkylamine salts of celodime and tribenuron-methyl are formed, containing at least eight carbon atoms in one of the alkyl radicals.

The task is also achieved by the fact that the herbicidal composition is obtained by mixing the components: celodime, tribenuron-methyl, trialkylamine containing at least eight carbon atoms in one of the alkyl radicals, a non-ionic surfactant and an aromatic solvent. When components are mixed, modified forms of celodime and tribenuron-methyl are formed in the form of trialkamine salts containing at least eight carbon atoms in one of the alkyl radicals. The components are mixed at ambient temperature.

When formulating the claimed composition, modifications of the active substances involved (celodim, tribenuron-methyl) with surface-active properties, capable of forming micelles and microemulsions due to the solubilization effect, are involved.

The following are examples of the implementation of the invention.

Example 1

In a flask with a stirring device, 20 g of an aromatic solvent, 50 g of celodime and 32 g of dimethylalkylamine are loaded (the content of the alkyl radical is at least 8 carbon atoms). The contents of the flask are stirred at a temperature of 25-30 ° C for 20 minutes to obtain a homogeneous homogeneous mass.

During this period, a chemical reaction takes place with the formation of dimethylalkyl (C ₁₀ -C ₁₂ ) ammo salt of cododym, which has surface-active properties. Then, 12 g of tribenuron-methyl and 10 g of dimethylalkyl (C ₁₀ -C ₁₂ ) amine are added to the reaction mass with stirring. Within 1 hour, the reaction of formation of dimethylalkyl (C ₁₀ -C ₁₂ ) amine salt of tribenuron-methyl having surface-active properties takes place. Then add 20 g of neonol AF 9-12. Received 144 g of a homogeneous combination preparation containing 34.7% wt. celodime and 8.3% wt. tribenuron methyl.

Composition: 56.9% by weight of dimethylalkyl (C ₁₀ -C ₁₂ ) celodime amine salt, 15.5% by weight. dimethylalkyl (C ₁₀ -C ₁₂ ) amine salt of tribenuron-methyl, 13.8% wt. neonol, 13.8% wt. aromatic solvent (solvent).

Example 2

Analogously to example 1.

30 g of celodime, 20 g of methylethylalkyl (C ₁₀ -C ₁₂ ) amine, 14 g of tribenuron-methyl, 9.5 g of methylethylalkyl (C ₁₀ -C ₁₂ ) amine, 45 g of neonol AF 9-12, 10 g of aromatic solvent ( solvent).

Received 128.5 g of a combined preparation containing 23.3% wt. celodime and 10.9% wt. tribenuron methyl.

Composition: 38.9% wt. methylethylalkyl (C ₁₀ -C ₁₂ ) celodime amine salt, 18.3% wt. methyl ethylalkyl (C ₁₀ -C ₁₂ ) amine salt of tribenuron methyl, 35.0% wt. neonol, 7.8% wt. solvent.

Example 3

Analogously to example 1.

50 g of celodime, 32 g of methylpropylalkyl (C ₁₀ -C ₁₄ ) amine, 30 g of tribenuron-methyl, 20 g of methylpropylalkyl (C ₁₀ -C ₁₄ ) amine, 30 g of syntanol, 10 g of aromatic solvent (solvent) were taken.

Received 172 g of a combined preparation containing 29.3% wt. celodime and 17.4% wt. tribenuron methyl.

Composition: 47.6% wt. methylpropylalkyl (C ₁₀ -C ₁₄ ) celodime amine salt, 29.1% wt. methylpropylalkyl (C ₁₀ -C ₁₄ ) amine salt of tribenuron-methyl, 17.4% wt. syntanol, 5.9% wt. solvent.

Example 4

Analogously to example 1.

50 g of celodime, 40 g of dimethylalkyl (C ₁₀ -C ₁₂ ) amine, 10 g of tribenuron-methyl, 8 g of dimethylalkyl (C ₁₀ -C ₁₂ ) amine, 40 g of neonol AF 9-12, 10 g of aromatic solvent (solvent) were taken .

Received 158 g of a combined preparation containing 31.6% wt. celodime and 6.3% wt. tribenuron methyl.

Composition: 56.9% wt. dimethylalkyl (C ₁₀ -C ₁₂ ) celodime amine salt, 11.4% wt. dimethylalkyl (C ₁₀ -C ₁₂ ) amine salt of tribenuron-methyl, 25.3% wt. neonol, 6.4% wt. solvent.

Example 5

Analogously to example 1.

15 g of celodime, 11 g of dimethylalkyl (C ₁₀ -C ₁₂ ) amine, 5 g of tribenuron-methyl, 3 g of dimethylalkyl (C ₁₀ -C ₁₂ ) amine, 15 g of nonionic surfactant-oleox-5, 10 g of solvent were taken xylenes.

Received 59 g of a combined preparation containing 25.4% wt. celodime and 8.4% wt. tribenuron methyl.

Composition: 44.1% wt. dimethylalkyl (C ₁₀ -C ₁₂ ) celodime amine salt, 13.5% wt. dimethylalkyl (C ₁₀ -C ₁₄ ) amine salt of tribenuron-methyl, 25.5% wt. oleox-5, 16.9% wt. mixtures of xylenes.

Example 6

Under the conditions of Example 1, 25 g of methylethylalkyl (C ₁₀ -C ₁₂ ) aminosodium salt of cododime, 35 g of methylethylalkyl (C ₁₀ -C ₁₂ ) amine salts of tribenuron-methyl, 30 g of neonol AF 9-12 and 10 g of coal xylene are mixed and mixed in within 20 minutes

Example 7

Under the conditions of Example 1, 66 g of dimethylalkyl (C ₁₀ -C ₁₄ ) amine salt of cododime, 9 g of methylpropylalkyl (C ₁₀ -C ₁₄ ) amine salt of tribenuron-methyl, 20 g of syntanol and 5 g of toluene are mixed and stirred for 15 minutes.

The physicochemical properties of the combined preparations and working fluids based on them are given in Table 1.

Table 1 Physico-chemical properties of the combined preparations of 0.4% wt. aqueous solutions of working fluids Fluid characteristics Sample No. The physical condition of the drug

Density,

physical state stability type of emulsion size of the main fraction of the dispersed phase, nm one 2 3 four 5 6 7 one Homogeneous light brown liquid 1,075 transparent thermodynamically stable micro emulsion 591 2 - "- 1,073 - "- - "- - "- 458 3 - "- 1,07 - "- - "- - "- 77 four - "- 1,078 - "- - "- - "- 89 6 - "- 1,074 - "- - "- - "- 92

results biological test experimental samples of combined preparations are given in table.2.

As test plants, peas (dicotyledonous weeds), oats (cereal weeds), and a genetically modified, tribenuron-methyl resistant sunflower were taken.

table 2 Biological test results Consumption rate, Test plants Sample No. celodime / tribenuron-methyl, g / ha genetically modified sunflower,% inhibition peas,% inhibition oats,% inhibition one 50.4 / 19.7 2,5 85.5 80,4 four 93 / 20.1 3,5 83,4 91.6 Select, CE (reference for comparison) 95/0 2.9 0 74.1 Express, VDG (reference for comparison) 0/21 3.9 72,4 0

As follows from the results of biological tests, which were limited to 3 days of observation for greater objectivity, a combined preparation based on surface-active modifications of celodime and tribenuron-methyl not only broadens the spectrum of suppressed weeds, but also has a higher biological activity compared to individual preparations "Select" and "Express", created on the basis of the usual structures of cadodyme and tribenuron-methyl.

Claims (10)

1. A herbicidal composition comprising a celodime in the form of a trialkylamine salt containing at least eight carbon atoms in one of the alkyl radicals, a non-ionic type surfactant and a co-herbicide, wherein the co-herbicide is a modified form of tribenuron-methyl - a trialkylamine salt in one of the alkyl radicals, at least eight carbon atoms. 2. The herbicidal composition according to claim 1, characterized in that it further comprises an aromatic solvent. 3. The herbicidal composition according to claim 1, characterized in that it contains components in the following ratio, wt.%:
Trialkylamine salt of cellodymium 25-66 Tribenuron methyl trialkiamine salt 9-35 Nonionic Type Surfactant 20-40 Aromatic solvent 5-15 4. The herbicidal composition according to claims 1 to 3, characterized in that it is used for controlling sunflower crops resistant to the action of tribenuron methyl. 5. The herbicidal composition according to claims 1 to 3, characterized in that it is used to control monocotyledonous and dicotyledonous weeds. 6. A herbicidal composition comprising a celodime in the form of a trialkylamine salt containing at least eight carbon atoms in one of the alkyl radicals, characterized in that it is obtained by mixing celodime, tribenuron-methyl, trialkylamine containing at least eight carbon atoms in one of the alkyl radicals , surfactant non-ionic type, aromatic solvent in the following ratios of components, wt.%:
Cletodim 15-40 Tribenuron methyl 5-30 Trialkylamine containing in one of the alkyl radicals at least eight carbon atoms 15-60 Nonionic Type Surfactant 20-40 Aromatic solvent 5-15 7. The herbicidal composition according to claim 6, characterized in that it is used for controlling sunflower crops resistant to the action of tribenuron methyl. 8. The herbicidal composition according to claim 6, characterized in that it is used to control monocotyledonous and dicotyledonous weeds. 9. The method for producing the herbicidal composition according to claim 6, comprising mixing the components: celodime, tribenuron-methyl, trialkylamine containing at least eight carbon atoms in one of the alkyl radicals, a non-ionic type aromatic and surfactant solvent. 10. The method of obtaining the herbicidal composition according to claim 9, which is carried out at ambient temperature.