SU461485A3 - Herbicidal composition - Google Patents

Description

(54) HERBICIDE STRUCTURE

This invention relates to chemical means of controlling undesirable vegetation in crops of cultivated crops.

Known herbicide, which is a derivative of dithiophosphate of the formula

cide composition based on phenoxyacetic acid derivatives of the general formula:

OW, -CO-OR2,

(N-CO-CH -S-PlO-H-C.

where a cycle with (N is a residue of cyclohexamethyleneimine or 2-methylpiperidine.

Also known herbicide composition based on derivatives of phenoxyacetic acid of General formula

C1 O-SNG-CO - OR,

where K is hydrogen or phenyl, alkyl, alkenyl, alkynyl.

However, the known herbicidal composition does not have a sufficiently high herbicidal activity.

To enhance the herbicidal activity and selectivity of action, a herbicide is offered: RI is a chlorine atom or methyl and R2 is hydrogen, an alkali metal atom or alkyl with 1-8 carbon atoms,

and dithiophosphate derivatives of the general formula:

15

S

f-CO-CH g8-P (o-H-CzNt) 5,

20

where the cycle is with (N is the residue of cyclohexamethylene amine or 2-methylpiperidyl, and the weight ratios of the components are from 1: 10 to 3: 1, respectively.

The form of preparation of a herbicidal preparation is usually in the form of a solution, dust, or emulsion concentrate.

Example 1. Rice plants 3-4 weeks tall 12-15 cm grown in rice

field, transplanted to the experimental area, which is covered with a layer of water in 3-5 cm.

Post-harvest treatment — after 8–12 days, the area with seedlings of chicken millet and woodlice that occurred during this time is treated once with the test active ingredient and a mixture of active principles, respectively.

Pre-emergence treatment - after 4 days in Note.

table 2 10

No rice damage.

The time of occurrence of weed plants is treated area once with the test active principle and a mixture of active principles.

The results of the experiment are treated in each case 7-8 weeks after the treatment with the herbicide.

Indicators pre-emergence treatment are given in table. 1, post-harvest processing - in table. 2

Table 1

Example 2. Rice plants 3–4 weeks in height 12–15 cm grown in a paddy field are transplanted to an experimental plot which is covered with a layer of water of 3–5 cm.

After 4 days before the emergence of shoots, the area is treated with the active principle and a mixture of active principles.

The results of the experiment (processed after b weeks) and the yield indicators (determined after 17 weeks) are given in Table. 3

Table 3

In tab. I, 2, and 3, the following conventions are adopted: 1A - 0.0-di-n-propyl-dithio. The phytotoxicity index is estimated on a 5-point scale: O-no damage to rice; 1,5-noticeable damage (single spots); 3-strong damage (plants give uv); 5 is full of plant death.

phosphoryl acetocyclohexamethyleneimide; IB - 0,0-di-n-propyl - dithiophosphoryl - aceto-2-methylpiperidide; PA - isopropyl ester of 2,4-dichlorophenoxyacetic acid.

Subject invention

Herbicidal composition based on derivatives of phenoxyacetic acid of the formula

RI

C.1- Vo- € H, -CO-OR,

where RI is a chlorine atom or methyl;

R2 is hydrogen, an alkali metal atom, or an alkyl with a carbon atom cycle of from 1 to 8,

characterized in that, in order to increase herbicidal activity, dithiophosphate derivatives of the general formula are introduced into it

S

II (N - CO - SNg - S - P (0 - H - C, H,),

where cycle c (N is a residue of cyclohexamethyleneimine or 2-methylpiperidyl,

moreover, the weight ratio of the components

range from 1: 10 to 3: 1, respectively.