SU420151A3 - HERBICID12 - Google Patents

Description

FIELD OF THE INVENTION The invention relates to chemical means for controlling undesirable vegetation in field crops.

It is already known irimenepne as a thiol-carbamate herbicide

hl1

L-C-CH

, N-CO-S-P

at

R is an aliphatic hydrocarbon ragde diqual,

W is an aliphatic hydrocarbon radical, which may be substituted by one or more halogen atoms or OH ground.

However, the known herbicidal preparations do not have a sufficiently high activity and selectivity of action.

In order to increase the herbicidal activity of the II candidate, the 1st of the action and the use of thiol carbamate derivatives of the general formula

BUT

CO-S-CH, where RI is hydrogen, chlorine or methyl,

Ro is methyl, ethyl, n-1royl or isonronne.

Form IR is the preparation of a common preparation - a solution, a concentrate of emulsions.

The compounds according to the invention are obtained by reacting benzylmercanthan with carbamic acid halide.

In tab. i has a physicochemical characterization of the compounds of the given formula studied as herbicides.

Masiiaiiit

Compound or structural ()) mule

X-Allyl-X-methyl-5- (l-chlorobenzyl) -thiolcarbamate

Ml-Propyl-X-metall-Z- ("-chlorobenzyl) tvol. Kdrbam.at

sshhhhh,

.ii2- O / -ci

Cjhs

T. Kip. WITH

1.5538

138-140

CO-S-CH2-Ox

SI-g C-CHO

N-CO-S-CH,

C.N5

C-S-CH9-OOC1; || B1 / i

about

I

I CHs-C-CHs

-c-s-cH.

sH about

M, K-Diethyl-5 (l-chlorobenzylthiolcarbamate)

Example 1. The seeds of rice and chicken millet were sown in the soil, which was then treated with compounds 1, 3 and 8 (reference) at a dose of 1 and 2 kg / ha.

After 40 days, we carried out a record of herbicidal activity on the devially scale:

135-133

1.-2-no damage, 3 4-ez} 1 damage, 5-7 - strong damage, 8-9-iolya plant death. The test results are presented in Table. 2

Example 2. A 25-day-old rice plant was planted in the soil into which the seeds of chicken millet were then sown. After 12 days, when the weed plant had three leaves, it was treated with compounds 1.3 and 8 at a dose of 2.4 and 6 kg / ha.

After 12 and 25 days, an account was taken of the coat of arms. Acid activity in points.

The test results are presented in .tabl. 3

: Pokp: and: tel gerbitsndnoy activity score

.

after 12 days | after 25 days AVl.v;

Subject invention

Use as a herbicide proizvodi. X thiolcarbamate of General formula

1 CH3 C-SNG

) N-CO-S-CH rVci

About

in which RI is hydrogen, chlorine or methyl,

R2 is methyl, ethyl, .h-propyl or isopr. Drank.