SU580801A3 - Herbicide - Google Patents

Description

(54) HERBICID MEANS

This invention relates to chemical means of controlling undesirable vegetation; namely, to herbicidal media containing active ingredients from the group of organic compounds and auxiliary components from among liquid or solid carriers, emulsifiers, cispergators, etc. Herbicidal agents are known whose active ingredients are thiol-carbamic acid derivatives. These include, for example, an agent based on S-4-hlrrbenzylhexahydroazepine-thiolcarbamate 1 or on the basis of $ -alkylhexamethylenimino-thiolcarbamate 2. However, the known herbicidal means of this group are not sufficiently effective. The aim of the invention is a new reipdicidal agent based on thiol-carbamic acid derivatives, which has an increased herbicidal activity and selective action. The goal is achieved by using thioliyarbamates of the general formula1 - | -SK where Jf is the lowest alkyd, 2,3,3-richloroallyl, benzyl or 4-chlorobenzyl as the active ingredient of the herbicidal composition. The application forms of the mold according to the invention are common: emulsion solutions, paste powders, suspensions, etc. They are prepared by known methods. The content of the existing substances in these forms is in the range of 0.1 to 95% by weight, preferably 0 to 5-9% by weight. % The efficacy of the herbicidal system is manifested in both the pre-emergence and post-emergence applications. Depending on the dose of the active ingredient, the heredity may exhibit herbicide properties of a selective or continuous action. The recommended doses for selective weed control in crops that have been planted are in the range of 0.2-6 kg / gL, preferably up to 1 kg / ha.

The method for producing compounds of formula I is based on the reaction of the chloroformic acid thiol esters with aetidine. They can also be obtained by reacting azetidinecarbamoyl chloride with mercaptans,

Table 1 shows the compounds of general formula t. .

Example 1. Seeds of experimental plants were sown in pots with clay and sandy soil and immediately after that the soil was treated with active substances in the form of an emulsion or dispersion at a dose of 1 kg / ha for effective substance. After 4 weeks; treatments evaluated herbicidal

Active ingredients

effect, expressing it with the following scale: O - no effect, 1OO - full of plant death.

The results of the experiment are discontinued in table 2.

The numbers of the compounds correspond to their numbers in the table, 1.

PRI mme R 2. Experimental plants 3–15 cm high were treated with active substances in the form of an emulsion or dispersion. The dose of active ingredients everywhere 1 kg-ha. In the continuation of the experiment, the plants were watered abundantly. After 4 Vedas, after the treatment of the plants, the herbicidal effect was determined by evaluating it as in Example 1.

The results of the experiment are given in table.3.

Table

Table 2

Formula and brets. A herbicidal agent containing an active ingredient from the group of thiocarbamates and auxiliary components from among liquid or solid carriers, which is that, in order to increase the effectiveness of the agent, the compound of the general formula is used as an active ingredient.

N-C-SR (СНз) з

Table3

where R is lower alkt, 2,3,3-trichloro allyl, benzyl, or 4 chlorobenzyl, in an amount of 0.1 -. 95 weight%.

Sources of information taken into account in the examination;

i. Japanese patent number 44623, cl. 371ir2i21, 1972.

2. US patent N9 3573О31, cl. 71-100, 1971. i