SU445181A1 - Herbicidal composition - Google Patents

Description

This invention relates to chemical weed control agents.

It is known that N-isonropyl-a-chloroacetaiylide is widely used to control annual monocotyledonous weeds, but it does not destroy dicotyledonous weeds.

It is also known that 1M- (4-chlorophenl) -G 1methyl-S-methoxy-urea destroys dicotyledonous sorium plants, as well as some monocotyledonous plants. In large doses, for example, 4.6 kg / ha, the carbamide derivative destroys single and dicotyledonous weeds in equal walls, but has a negative effect on the potato, i.e. it is phytotoxic for some cultivated crops.

In addition, the phytotoxic effect of the carbamide derivative increases dramatically if the amount of precipitation exceeds 20 mm. This is extremely harmful not only for potatoes, but also for other cultivated plants.

Herbicide on the basis of triaznna derivatives destroys mainly dicotyledonous weeds that have already been raised. However, the duration of its effect reaches only 4-6 weeks, which is clearly not enough when using triazines on potato fields, since the growing season of potatoes is long.

Thus, among the chemical weed control agents on potato floors, there is no such preparation that, on the one hand, would be effective against single and dicotyledonous weeds, and on the other, it would not damage the potato during

cultivation period.

In order to enhance the herbicidal activity and selectivity of action, a herbicidal composition based on 2-methyl-mercapto4, 6-bis-propylamino-1,3,5-triazine has been proposed, into which X-nsopropyl-a-chloroacetanilide and X- (4-chlorfeiyl ) - N - methyl - N - methoxycarbamide in the following ratio of components (wt.%): 2-methyl mercapto-4,6 - bis pzopropylamino - 1,3,5 - triazine 10-20, Nisopropyl-a. Chloroacetanilide 30-70 N- (4-chlorophenl) -N-methyl-N-methoxy-carbamide 20-35.

The form of preparation of the drug is usual - in concentrate, emulsions, dust, powder, solution.

PRI m. Seeds of potatoes and some weedy plants are sown in the soil, which is pretreated with the appropriate doses of the mixture in different doses (see Table 1).

The results of the experiment are determined after three weeks and are expressed in points: O — no coat of arms of active activity, 100 — complete destruction of weedy plants (see Table 2),

Table 1

table 2

Herbicidal activity, score

Subject invention

1. A herbicidal composition based on 2-methylmercapto-4, 6-bis-isopropylamino-1,3,5triazine, characterized in that, in order to enhance the herbicidal activity and selectivity of action, Nisopropyl-a-chloroacetanilide and LY- ( 4-chlorophenyl) -M-methyl-N-methoxy-carbamide.

2. Herbicidal composition tso n. 1, characterized in that it contains from 10 to 20 weight. % 2-methylmercate-4,6 - bis-isoprocylamino - 1,3,5 - triazine, from 30 to 70 wt.% N-isopropyl-a-chloroacetanilide and from 20 to 35 weight. % N- (4-chlorophenyl) -Y - methyl - N methoxy-carbamide.