RU2390998C1 - Liquid pesticide composition for grain crops protection - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: liquid herbicidal composition for protection of protection of grain crops includes derivatives of fenoxipropionic acid as a reactant with antidote based on heterocyclic derivatives of carbonic acid and additive agents. This additionally contains indolyl-3-acetic acid to the reactant in the ratio of (0.002-0.2):1, at the following ratio of elements, wt %: 5-30 reactant, 2.5-15 antidote, 0.01-1.0 indolyl-3-acetic acid, other additive agents till 100%.

EFFECT: invention allows to increase efficiency and stability of the composition.

2 ex, 4 tbl

Description

The invention relates to the use of preparations based on derivatives of phenoxypropionic acid, for example, Fenoxaprop-P-ethyl, Fenoxapropetil and Clodinafop-propargyl, used to simultaneously protect crops from weeds, from phytotoxic side effects of these herbicides and stimulate the development of crops.

Known herbicides for the protection of crops in the form of an emulsion concentrate containing derivatives of phenoxypropionic acid, for example phenoxaprop-ethyl, phenoxaprop-P-ethyl and excipients (US Pat. USSR No. 1074387), Clodinafop-propargyl (US Pat. RF No. 2342834).

When using herbicides, undesirable, unacceptable damage to crops can occur, especially in the case of using herbicides in a growing plant, so there is a need to exclude possible phytotoxicity.

To reduce phytotoxicity, various antidotes are used that do not exhibit herbicidal activity, but help to reduce the phytotoxic effect of the herbicide on the culture due to its rapid metabolism in the protected plant. The antidote can be used both as an independent drug in a tank mixture with a herbicide, or as part of a preparation containing the active substance, antidote and excipients.

Various antidotes are known that are used in tank mixtures with the indicated active substances (US Pat. RF 1360573, 1632362, 2182423, 2276844).

The most commonly used antidotes to reduce the phytotoxicity of the action of herbicides based on phenoxypropionic acid derivatives for cereals are the following antidotes: 1-phenyl- (2,4-dichlorophenyl) -5-trichloromethyl-triazolecarboxylic acid ethyl ester (hereinafter referred to as phencllorazole-ethyl), diethyl 1- (2,4-dichlorophenyl) -5-methyl-2-pyrazoline-3-carboxylic acid ester (hereinafter Mefenpyr diethyl), 1-methylhexyl (5-chloroquinolin-8-yloxy) -5-diacetate (hereinafter referred to as Cloquintocet- mexil).

The known compositions of preparations based on derivatives of phenoxypropionic acid using Fencllorazole-ethyl (Pat. DE 3935977), Mefenpyr-diethyl, Clochintocet-mexyl (Pat. RF 2105475, Pat. US No. 4881966) as antidotes. The compositions are made either in the form of an emulsion concentrate, or in the form of an aqueous emulsion or granules.

Of particular interest are preparations for grain crops with improved consumer properties, containing two or more active substances, one of which relates to plant growth regulators.

There are various growth regulators used in cereals, for example, Cubaxin (US Pat. RF 2204228), cyclohexanecarboxylic acid hydroxyethylamide (AS USSR 497008), substituted triazolyl-1,3,5-triazines (US Pat. RF 2230065), triazine carboxylic salts acids (US Pat. RF 2091375).

It is known to use heteroauxin as a growth regulator for fruit and vegetable crops (Plant Growth Regulators. Edited by V.S. Shevelukhi. M., 1990, p. 11).

The closest technical solution is a liquid herbicidal composition for protecting crops, containing phenoxypropionic acid derivatives with an antidote based on heterocyclic carboxylic acid derivatives and excipients as an active substance (US Pat. RF 2105475). Mefenpir-diethyl is indicated as an antidote in the examples; Clochintocet-mexyl, Fencllorazole-ethyl. The disadvantage of these drugs is their lack of biological effectiveness and area of use.

The purpose of the invention is to increase biological efficiency, the creation of a multifunctional composition while maintaining high stability of the composition during storage.

This goal is achieved through the use of a liquid herbicidal composition for the protection of crops containing phenoxypropionic acid derivatives with an antidote based on heterocyclic carboxylic acid derivatives and excipients as an active substance. Moreover, the pesticidal agent additionally contains indolyl-3-acetic acid, taken in relation to the active substance (0.002-0.2): 1, in the following ratio of components, wt.%:

Active substance 5-30 Antidote 2,5-15 Indolyl 3-acetic acid 0.01-1.0 Excipients the rest is up to 100%

Plant Growth Regulator Heteroauxin - indolyl-3-acetic acid, is a natural phytohormone. The difficulty of using heteroauxin as a component in the tank mix lies in the dosage due to low consumption rates. When using heteroauxin in the preparation, the preparation of the formulation is difficult due to insufficient solubility in organic solvents, precipitation during storage of the herbicidal composition.

Heteroauxin helps stimulate metabolism in plant tissues. It turned out that in the claimed composition, indolyl-3-acetic acid is chemically neutral and does not interact with two other substances - an antidote and an active substance, which allowed not to reduce its properties as a plant growth regulator, but to strengthen them in the claimed combination and lead to coordination of the development of the root system and the stem, which led to increased yields. It was found that heteroauxin is a good transporter of the active substance to the growth point of the weed plant, which contributed to an increase in the biological effectiveness of the claimed composition.

The active substance used was Fenoxaprop-P-ethyl, Fenoxapropetil and Clodinafop-propargyl, which were combined according to the invention with the antidotes Fenclorazole, Klohintocet-meksil, Mefenpir-diethyl.

The main field of application of the claimed compositions is cereals (wheat, rye, barley, oats). The composition was used in a growing culture. Before use, the claimed herbicidal composition is diluted with water to the desired concentration.

The proposed composition may contain standard emulsifiers, which are nonionic, anionic or cationic surfactants, used mainly in the form of mixtures of nonionic and anionic substances. Preferred emulsifiers include ethoxylated nonylphenols, ethoxylated aliphatic alcohols, ethoxylated castor or soybean oil, xylene, cyclohexanone, and multicyclic aromatic substances are preferred as high boiling solvents. All these compounds are known and traditionally used in similar preparations.

The invention is illustrated by the following examples.

Example 1. Preparation of a herbicidal composition

20.8 g of cyclohexanone are charged into the reaction flask, 0.01 g of heteroauxin are dissolved in this amount. The mixture is heated to 40 ° C with stirring, 5.0 g of Fenoxaprop-P-ethyl are added, stirring is continued for 15 minutes. Then add 10 g of ethoxylated soybean oil and 28.93 xylene. Stirred at the same temperature for another 30 minutes. 15.0 g of phencllorazole ethyl are charged. After dissolving it, add 20.26 g of a mixed type emulsifier and mix for another 30 minutes. The resulting preparation is a clear, viscous liquid. When mixed with water, a transparent or opalescent mobile liquid is formed.

Similarly, examples were prepared using Fenoxaprop-ethyl and Clodinafop-propargyl as the active substance, and Klohintocet-Mexila, Mefenpir-diethyl as the antidote for all the claimed ratios of the components.

The results of the compositions and their characteristics are shown in table 1

Table 1 Experiment Options DW, wt.% Antidote, wt.% Heteroauxin, wt.% The ratio of heteroauxin / AI Storage stability at 20 ° С, month one Phenoxyprop-P-ethyl, 5 Fenclorazole-ethyl, 15 Heteroauxin, 0.01 0.002 24 months, homogeneous composition 2 Fenoxaprop-ethyl, 20.1 Mefenpyr diethyl, 7.9 Heteroauxin, 0.3 0.015 24 months, homogeneous composition 3 Clodinafop-propargyl, 30.0 Clochintocet-mexyl, 2.5 Heteroauxin 1.0 0.2 24 months, homogeneous composition Comp. example Fenoxaprop-ethyl, 20.0 Fenclorazole-ethyl, 10.0 - - 24 months, homogeneous composition

The stability of the working solution was studied in dynamics. As a result of the experiment, it was found that within 24 months all the compositions in accordance with the invention did not change their appearance: neither stratification nor precipitation of crystals was observed.

Example 2. Small plot field experience.

Object of study - winter wheat, grade Angelina.

The test area is zone I (podzolic and sod-podzolic soils of the taiga-forest region). Central district of crop cultivation.

The effect of the claimed composition on the structure of the crop of winter wheat is presented in table 2.

table 2 Experience Options Consumption rate of DV, g / ha Repetitions Structure elements The number of productive stems, pcs / m ² Plant height, cm Spike length, cm The number of grains in the ear, cm Mass of 1000 grains, g I 515 110.5 8.3 28.6 44.1 one. II 512 106.1 7.9 28.3 44.2 70 III 506 105.9 8.0 28.6 44.2 IV 509 105.9 8.3 28.6 44.2 average 511 107.1 8.1 28.5 44.2 I 533 111.4 8.1 31.6 45.6 2. II 528 109.5 8.4 30.4 45.2 85 III 525 107.3 8.2 33.4 45.7 IV 526 107.5 8.1 33.3 45.3 average 528 109.0 8.2 32.2 45.4 I 522 107.4 8.5 29.5 46.9 3. II 518 104.5 8.5 30.2 46.5 40 III 510 105.7 8.4 29.8 46.9 IV 523 109.5 8.2 29.8 46.6 average 518 106.8 8.4 29.8 46.7 I 494 100.3 7.1 27.8 42.5 four. II 490 100.5 6.7 27.6 42.3 Comparative example 70 III 482 103.3 7.1 27.9 42.2 IV 479 98.0 7.0 27.9 42.1 average 486 100.5 6.9 27.8 42.3 I 490 99.3 7.6 26.6 41.2 5. Control II 478 102.8 7.3 26.9 41.7 without - III 490 97.8 7.3 27.1 41.4 processing IV 495 98.9 7.0 26.8 41.4 average 488 99.7 7.3 26.9 41.4

The use of the proposed composition increases the productive bushiness, lengthens the plant, significantly increases the length of the ear and contributes to an increase in the number of grains in the ear and the mass of 1000 grains, thereby providing an increase in crop yield.

Winter wheat yield data are presented in Table 3.

Table 3 Experience Options Harvest by replicates, c / ha Average crop one 2 3 four c / ha % to control one. 44.9 44.0 44.7 43.9 44.4 116.2 2. 45.9 46.2 44.8 45.4 45.6 119.4 3. 44.6 42.9 43.4 44.5 43.9 115.9 4. Comparative example 39.9 39.7 39.8 40.7 40.0 104.7 5. Control without processing 38.5 38.0 37.5 39.0 38.2 100.0

Table 4 presents data on the biological effectiveness of the claimed composition in the processing of winter wheat against monocotyledonous cereal weeds. Accounting was carried out 30 days after processing.

Table 4 Experience Options g LW / ha Number of weeds Wet weight of weed ind./m ² decrease,% of control g / m ² decrease,% of control one. 70 4.0 95.8 3.0 98.9 2. 80 4.0 95.8 6.0 97.9 3. 75 3.0 96.9 14.0 95.1 4. Comparative example 70 11.0 88.6 31.0 89.1 5. Control without processing - 96.0 - 286.0 -

The obtained herbicidal compositions have high biological activity, high growth-regulatory activity due to the use of heteroauxin in the claimed compositions, which has shown new properties as a transporter of active substances. In addition, despite the multicomponent complex composition, the composition retained high stability during storage.

Claims (1)

A liquid herbicidal composition for protecting crops, containing phenoxypropionic acid derivatives with an antidote based on heterocyclic carboxylic acid derivatives as an active substance, and auxiliary substances, characterized in that the composition further comprises indolyl-3-acetic acid, taken in relation to the active substance ( 0.002-0.2): 1, in the following ratio of components, wt.%:
Active substance 5-30 Antidote 2,5-15 Indolyl 3-acetic acid 0.01-1.0 Excipients The rest is up to 100%