SU1019990A3 - Herbicidal composition - Google Patents

Abstract

The present invention provides a trifluoromethylphenoxy phenoxy crotonic acid derivative having the formula (I) wherein X represent hydrogen or halogen atom, and R represents an alkyl, haloalkyl, alkenyl, haloalkenyl or alkynyl group.

Description

WITH

The invention relates to chemical means for controlling weeds and unwanted vegetation, namely, herbicidal compositions based on them. derivatives of aryloxyalkanoic acids. Herbicidal compositions containing active substances — derivatives of aryloxyalkanoic carboxylic acids and auxiliary components; solvents, fillers, emulsifiers, etc., are known. for example, polyoxyethylene alkylaryl ethers and calcium dinaphthyl methanesulfonate SLS However, well-known herbicidal compositions KIT of this group are not always effective for some species with polar plants or applied harm the plants cool-temperature object of the invention -. aktivnosti.kompozitsii to increase the herbicidal axes Nove ariloksialkankarbonovyh acid derivatives. . This goal is achieved with a herbicidal composition in the form of an emulsifying concentrate containing an active substance-an aryloxyalkanoic acid derivative of the general formula. X (СНз УV I OF - / OVo- Г) OCH-OH CH COOIl 3 vri / where X is hydrogen, chlorine or bromine; R - alkyl C-Cg- or Cd, 2-chloroethyl,.-Bromoethyl, 3-chloropropyl, 2,2,2-trichloroethyl, ally 1-methylallyl, 2-chloroallyl, 2-hexenyl or propargyl, with the weight ratio of the aryloxyalkanecarboxylic derivative acids, polyoxyethylene alkylaryl ether, calcium dinaphthyl methanesulfonate and xylene, equal to 25: 10: 5: 60, respectively. The proposed herbicidal composition is highly effective. It affects many species of weedy plants and does not cause damage to cultivated plants. It can be used both in pre-emergence and post-emergence methods. In tab. 1 shows the active compounds of general formula 1 used in the herbicidal composition. Experiment 1. For cultivated plants and weeds with pre-emergence tillage. In each pot, 600 cm of soil is loaded and seeds are sown at a depth of 0.5 cm of wheat, -soy, radish, chicken millet (bilberry, and creeping weed. Emulsifiable concentrates are diluted with water and the desired concentrations of compounds are obtained for a flow rate of 1000 l / ha; About diluted solutions are evenly applied to the soil. 20 days after the treatment, the herbicidal effect and phytotoxicity of cultivated plants are evaluated according to the following scale .: 10 - complete growth inhibition 9 growth inhibition by 90-100 8 - growth inhibition by 80-90 7 - inhibition growth of 70-80% 6 - suppression of ro a hundred to 60-70% 5 - growth inhibition by 50-60 4 - growth inhibition by 40-50 3 - growth inhibition by 2 - growth inhibition by 20-30% 1 - growth suppression by 0-20 O - no herbicide Actions The results of the experiment are presented in Table 2. The numbers of the compounds here and below correspond to the numbers in Table 1. About the pits 2. For cultivated plants and weeds with pre-emergence tillage In each 2000-cm plastic pot load the soil and sow the seeds rice, maize, wheat, soybean, cotton, radish, cinnamon, creeping weed, foxtail, jones grass, and mari (25 cei n for each at a depth of 0.5 cm. The emulsifiable concentrates are diluted with water and the diluted solutions are uniformly applied to the soil. 20 days after the treatment, the herbicidal action and phytotoxicity of the cultivated plants according to this scale are determined. The results of the experiment are presented in table. 3. Experience 3. For cultivated plants and weeds in the post-emergence treatment of foliage. The seeds of corn, oats, soybeans, radish, cinnamon, creeping weeds are sown in a pot of 600 cm with soil. The emulsifiable concentrates are diluted with water and the desired concentrations of the compound are obtained. The diluted solutions are uniformly sprayed with a flow rate of 1000 l / ha during the development

31

narrow-leaved weeds to stage 22, 5 leaves, and broadleaf - to the first reversible stage. Fifteen days after treatment, the herbicidal action and phytotoxicity of the cultivated plants is determined and evaluated according to the scale indicated.

The results of the experiment are presented in table. .

Experience C. Experience in prslevskhodovoy processing of cultivated plants and weeds.

For 2000 s, polyethylene pots are placed in soil and seeds of rice, maize, wheat, soybean, cotton, radish, cinnamon weed, creeping weed, foxtail, Johnson grass, and marie (25 seeds each) are sown. Emulsifiable concentrate is diluted with water and half Concentrations 125, B2, 31.25 ppm. These solutions are uniformly applied at a flow rate of 200 ml / pot with the growth of plants up to the 2-A leaf stage. 10 days after the treatment, the herbicidal action and phytotoxicity of the cultivated plants are assessed according to the indicated scale.

. The results of the experiment are presented E table. five.

The results of the experiments, presented in Tables 2-5, indicate a high herbicidal activity of the proposed composition and a good selectivity of its action.

Continued table. one

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Claims (2)

A HERBICIDAL COMPOSITION in the form of an emulsifiable concentrate containing an active substance derived from an aryloxyalkanecarboxylic acid, polyoxyethylene alkyl aryl ether, calcium dinaphthyl methanesulfonate and xylene, characterized in that, in order to increase the herbicidal activity, it contains a general aryloxy carboxylic acid derivative of the formula - hydrogen, chlorine or bromine; R is alkyl Cj-C 5 · or Cd, 2-chloroethyl, 2.-bromoethyl, 3 ^- chloropropyl, 2,2,2-trichloroethyl, allyl, 1-methylallyl, 2-chlorallyl, 2-hexenyl or propargyl, with a weight ratio of the derivative of aryloxyalkanecarboxylic acid, polyoxyethylene alkyl aryl ether, dinaphthylmethanesulfonate calcium and xylene equal to 25: 10: 5: 60, respectively. '' 101999 »