SU579847A3 - Herbicide - Google Patents

Description

(54) HERBICID MEANS

one

The invention relates to chemical agents for controlling undesirable vegetation, namely, herbicidal agents containing active substances from the class of organic compounds and inerc OI)) e components from among liquid or solid carriers.

Herbicidal agents are known, the active substances of which are substituted amides-carboxylic acids. These include, for example, an agent based on K 12,6-diethylphenyl) - -butoxymethyl amide of chloroacetic acid tl and an agent based on N - (2-tert-alkyl-6-alkylphenyl) - AlkoxyG kilids of halo-acetic acids.

However, the known herbicidal agents of this type are not sufficiently effective.

The purpose of the invention is a new herbicidal agent based on substituted carboxylic acid amides, which has an increased herbicidal activity and selectivity of action. This goal is achieved by using substituted chloroacetic acid amides of general formula 1 as the active ingredient of the herbicidal agent.

A-o-r

AT

where 1 is methyl or ethyl;

 chlorine, methoxy, ethoxy or trifluoromethyl group;

R is hydrogen ipn methyl

A - ethylene, mono - or dimethylethylene.

The forms of application of the compounds of general formula I are ordinary: emulsion solutions, pastes, powders, etc. They are prepared by known methods. The content of active ingredients in the formulation is in the range of 0.5 to 95% by weight.

The herbicidal agent according to the invention has a good selectivity of action. With it, you can destroy the grass weeds in crops; cultivated cereal plants. The effectiveness of the agent is manifested in both pre-emergence and post-emergence application. Recommended application rates of the herbicide agent are in the range from 0 to 1 to 10 kg / ha (according to the active substance). Moderate doses (0.1. 2 kg / ha) provide selective destruction of fronds. Higher doses of scars for continuous damage to unwanted vegetation. Compounds of formula I are prepared in various ways. One of them is based on the reaction of substituted anilines with anhydride or chloroacetic acid chloride. Below are compounds of formula I. used as active ingredient in the proposed. Herbicidal agent 1. 2-Chloro-6-megyl-M- (2-methoxyethyl) -chloroacetanilide 2, 2-Chloro-6-met. l-H- (2-ethoxyethyl) -chloroacetanilnd 3,2-Methoxy-6-mvtil-N- (2-methoxyethyl) -chloro-avantannlnd, 4,2-Methoxy 6-methyl- W- (l-methyl-2-methoxyethyl) -hdoroacetanilide 5.2-Ethoxy-6-methyl- N - (2-methoxyethyl) -chloroacetanil d 6.2-Ethoxy-b-methyl-N- (1-methyl-2 methoxyethyl) -chloroacetanilide 7.2-Ethoxy-6-methyl-N- (2-ethoxyethyl) -chloroacetanilide 8.2-Trifluoromethyl -N- (2-methoxyethyl) -chloroethanthanlide, Example 1. The pre-sunrise method. The seeds of the experimental plants were sown in special vessels filled with soil, and a day after that, the soil was treated with aqueous suspensions of active substances. above. The vessels were left under greenhouse conditions at 22-25 ° C and at about 70% relative humidity. 28 days after seeding, the herbicidal effect in points was determined: 9 - no effect; 1 - full of death of plants; 8-2 intermediate stages of plant damage. The results of the experiments are given in table. 1 and 2, Table 1

Claims (2)

 1rotsa / 1zhenzheniya tabpitsy 1 Example 2. G1 {.1 hedgehog experience. In special plastic cups filled with arable land, seeds of experimental plants were sown and covered with 2 cm of soil, then moistened. After planting, the soil was treated with suspensions of active substances and left under greenhouse conditions at 22-25 ° C with 70% relative humidity. The results of the experiment were evaluated 20 days after treatment: 0% - no damage; 1 O0% - full of death of rag: teney. For comparison, the known herbicide substances were used: 2,6-Diethyl-K - (methoxymethyl) -chloroacetate nilide (Compound (A) 2,6-Denetil-N- (2-Bugoxyethyl) -Hporal anilyl compound (B) Claims of the invention containing a component from the group of substituted carbonic acids and auxiliary components from among liquid or solid carriers, characterized in that, in order to increase the effectiveness of the means, the quality of the active substance is used as a compound of the general formula where R is methyl or ethyl; R is chlorine, methoxy, ethoxy or triformethyl group, hydrogen or methyl, A - ethylene, mono-dimethyl ethylene, in an amount of from 0.5 to 95 wt.%. Sources of information taken into account in the examination: 1. US patent number 366320О, class 71-118 , 2. US patent number 3475157, cl. 71-118,