SU1303013A3 - Method of fighting unwanted plants - Google Patents

Abstract

Herbicides of formula: <IMAGE> R and R1 being an alkyl radical.l

Description

one

The invention relates to chemical methods of protecting plants, namely, a method of controlling undesirable vegetation by treating plants with an N-phosphonomethylglycinamide derivative.

The purpose of the invention is to increase the efficiency of the method.

Example 1. Used in the method derived N-phosphonomethyl-glycinamide formula

OH I

 NHCH CONSO CH

he

CH,

3

obtained by debenzylation of the compound

(011)., CH, AND (CH, WITH HpCHJDON (CK)

in the presence of a palladium catalyst supported on coal (10% Pd). The process is conducted in methanol at ambient temperature. At the end of the reaction, the catalyst is removed by filtration and salination with propylene oxide. Evaporation of the filtrate, get the desired compound with so pl. 21 3 C.

Example 2 Herbicidal use after germination of plant species.

In the 9x9x9 cm pods, filled with a piece of agricultural land, a certain number of seeds are sown, depending on the plant species and on the size of the seed.

Then the seeds are covered with a layer of earth about 3 mm thick. and the seeds are left to germinate until the germination at the appropriate stage. The processing stage for cereals is the stage of formation of the second sheet. The processing step for two half-45 vegetation by treating the spreading is the seed stage with the developing present first leaf.

Then the pots are treated by spraying the pulp in an amount corresponding to a volumetric dose of about 500 L / ha containing the active substance in a given concentration.

The pulp used for the treatment is a suspension or aqueous solution of the active substance;

15

g

030132

holding 0.1 wt.%. Semulsol (Сё- mulsol NP 10) - surface-active agent in the form of polyethoxylated alkylphenol, in particular polyethoxylated nonylphenol (and 0.04 wt.% Tween 20 - surface-active agent in the form of polyethoxylated sorbitol oleate).

The treated pots are then placed in tanks intended for receiving irrigation water, and held for 28 days at ambient temperature at a relative humidity of 70%.

After 28 days, the number of live plants in pots treated with pulp containing the test active substance and the number of live plants in the control pot treated under the same conditions, but not using the pulp containing no active substance, are considered. In this way, the percent inhibition of the treated plants is determined compared to the untreated control sample. The percentage of inhibition equal to 100% indicates that the complete elimination of the considered

30 plant species, and a percentage equal to O indicates that the number of living plants in the treated pot is equal to the number contained in the control pot.

The results obtained are presented in the table.

Thus, the proposed method is more efficient than the N-phosphonomethylglycic acid dimethylamide-based method.

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35

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Claims (1)

Invention Formula A way to combat unwanted N-phosphonomethylglycinamide derivative, characterized in that, in order to enhance the efficiency of the process, a compound of the formula N-phosphonomethylglycinamide is used as a derivative OH I NHCH CONSO CH I 2 2 I 5 3  HE CH. | in the amount of 0.125-8 kg / ha. Plant species Proposed connection. Editor E. Papp Compiled by N. Kibalova Tehred I.PopovichKorrektor A.Zimokosov Order 1226/57 Circulation 630. Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 too 100 100 0 60 0 0 60 30 60 ten ABOUT 100 60 10 60 90 50 ABOUT 60 ABOUT 20 o 80 o 9v 10 100 100 100 100 20 100 100 100 30 90 100 100 100 100 too 100 100 100 90 98 100 100 O10 60 95 100 100 100 100 10 20 20 30