SU661993A3 - Herbicide composition - Google Patents

Description

(54) HERBICIDE COMPOSITION

R and R together with the nitrogen atom can mean ethyleneimino, pyrrolidino, dimethylpyrrolidino, piperidino, methylpiperidino, hexamethyldamino, morphodino, dimethylmorpholino.

The content of the active substance in the herbicidal composition according to the invention is in the range from 1 to 50% by weight,

The use of the active ingredients (d. In.) Is common; solutions, emulsions, pastes, powders, etc., etc. They are prepared by known methods.

Compounds of formula

Compounds of formula I are prepared by reacting the corresponding l-phenoxybenzoic acids, their anhydrides or acid chlorides with amines. They can also be obtained by the interaction of p-halobenzamides with phenols of l-hydroxybenzamides with halobenzenes.

In tab. 1 shows compounds of general formula I,

Table 1

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Continued table. one

Continued table. 1 Below are examples illustrating the herbicidal activity of the composition according to the invention, Example 1. Pre-emergence application. Seeds of onyt plants were sown in vessels with prepared soil and immediately after sowing, the soil was treated with aqueous emulsions of active substances. Thereafter, the plants were grown under greenhouse conditions, and 20 days after treatment, the herbicidal activity of HOCTI was evaluated; and phytotoxicity with respect to cultivated plants in points according to the following scales. Lack of effect Growth inhibition,%: The results of the experiment are presented in Table. 2, For comparison, the known compounds are used: A - dimethylamide 4-phenoxybenzoic acid B - amide O- (3,4-dichlorophenoxy) benzoic acid in - 4-nitro-2, 4-dichlorodiphenyl sufir G - isopropyl ester of 3-chlorophenylcarbamic acid, . Example 2. Use under rice floor conditions. In the special Barifepa slides, they mixed the soil from the rice floor, transplanted rice seedlings in the three-leaf stage and seeds of chicken millet into a pot. In the soil, immersed in water, they injected the required number of active sun-plants. 25 days after the treatment, the herbicidal activity and phytotoxicity were determined according to a rating scale similar to Example I. At the same time, the effectiveness against broadleaf weeds, which grew spontaneously, was evaluated. - The results of the experiment are presented in table. 3. For comparison, known compounds were used; D - d- (4-chlorophenoxy) benzoic acid dimethylamide; E — 3,4-dichloro-6-phenoxybenzoic acid amide; D — 3-chlorophenylcarbamic acid isopropyl ester. Example 3. The soil from the rice field was placed in Wagner's pots and the experiment was conducted under conditions of rice FIELD. After planting the tubers and seeds of the test plants in the soil, the active substances were injected into the soil under water. 25 days after the treatment, the herbicidal activity was determined analogously to example 2. The results of the experiment are presented in Table 4. For the comparison, the known compounds were used: A, B, G. Table 2

one

2 3 5 6 8

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IS

16 Continued table. 2

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23

24

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Table 3

Continued table. 3

G1 | 1during table. J

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Continued table. 3