SU503484A3 - Herbicide - Google Patents

Description

(54) HERBICID

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

It is known to use as a herbicide a monothiol carbamate substituted by chlorine in a benzyl ring, for example 5- (4-chlorobenztgl) -K, K-diethyl thiol carbamate.

Odanako known herbicides do not have a sufficiently high herbicide activity and selectivity of action.

In order to enhance the herbicidal activity and selectivity of action, it has been proposed to use S-benzyldisrop-butylthiolcarbamate as a herbicide.

The proposed compound also stimulates the growth of both aboveground and underground parts of rice, so that the plant at the first stages of its development acquires resistance to undesirable environmental factors, the ability to withstand wind, which often pulls out rice shoots na flooded; 1st rice fields x.

The form of preparation of the drug is usual: in the form of dust, emulsion concentrate.

Benzene X X -di-sec-butylthiolcarbamate is obtained by the reaction of di-bgo / -butylcarbamoyl chloride and benzyl mercaptan.

P and measures 1. In the greenhouse, the soil was treated with a solution of 5-benzyl-M, K-di-V7o / butylthiolcarbamach (Compound 1) and the standard; Drug concentration 0; 0.2; 0.3; 0.4%, which corresponds to a dose of 4 kg / ha.

Immediately thereafter, each pot of nanolip water to a level of 7 cm from the soil surface. Next, sowing was carried out at the rate of 15 peporossky rice grains pa pot. The pots were kept in air with a daytime temperature of 10-25 ° C and 14 hours of pariodo-v illumination. After 24 days, the percentage of germinated plants relative to the control and the length of the sprouts was reported.

The results obtained from comparative sampling flakes on rice, performed on flooded culture under conditioned air, are shown in Table. one.

Example 2. The soil was treated with a solution of 5-benzyl di-bgor-butylthiolcarbamate (compound 1). Sowing was performed immediately after treatment.

During the test, the air temperature in the greenhouse ranged from -J-10 to -28 ° C. 27 days after the treatment, all rhg plants were subjected to biometric control. In tab. 2 shows the average values per 40 p fcoBbix of the grains planted in each state.

Example 3. M, N-diisopropyl benzylthiolcarbamate, N.N-AHHSO6} g were treated with lbenzylthiolcarbamate, N, N-di-n-butylbenzylthiolcarbamate in doses of 4, 6.20 kg / ha, respectively.

Table 1

table 2

After treatment 21 days after sowing, the length of the shoots was measured and the number of sec-ry roots was determined. The resulting values are shown in Table. 3

Table 3

EXAMPLE 4 The seeds of the following species are grown to a depth of 0.5–1 iCM in the soil: chicken millet, bristles, chaff, oats, clover, starfish, and woodlice. After sowing, the soil surface was uniformly treated with compound 1 at a concentration of 0.05, 0.10, 0.20, 0.30% and molinate, which corresponds to a dose of 0, 1, 2, 4, 6 kg / ha.

25 days after the treatment, the final results were considered, and for each treatment the following rating scale was applied:

O - regular germination and development; Application in

1- slightly negative difference compared to control;

2- activity to a certain extent, with partial damage that does not threaten the life of the plant;

3- significant activity causing

damage, definitely affecting plant growth and development, i.e. herbicidal activity.

4- full plant death or delay

seedling development.

The test results are presented in abl. four.

Table 4 Formula of the invention as the herbicide of S-benzyl-di-sec-butylthiolcarbamate.