SU336846A1 - - Google Patents

Description

This invention relates to the control of undesirable vegetation.

An agent for controlling undesirable vegetation of the general formula is known.

II

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-Sh- € -0-СНо-С С-СН2С1

C It is proposed to use a herbicidal agent containing as an active ingredient a compound of the general formula RR R2 O 1 II Arnl — C — CH — O — C — N where aryl means phenyl, naphthyl, phenyl or naphthyl, substituted with halogen, lower alkyl, lower alkoxy. , phenyl, substituted methylenedioxy in 3 and 4 positions; R and R are hydrogen, lower alkyl, chlorine or bromine;

substituted by halogen, lower alkoxy, alkyl, or nitro.

Table I describes the characteristics of the proposed compounds.

In addition to the active ingredient, the herbicide may include a carrier, a wetting agent, a solvent, a dispersant, an emulsifier, and other additives. ;

The forms of the proposed means are ordinary. They can be in the form of powders, solutions, emulsions, dusts and granules. 1. Prev in with X o d o v a o b b Example of working. Digltaria sangulnalis, Setaria gtaiica, Echinochloa crusgalli, Avena sativa, Amaranihiis retroflexus, Brassica jiincea, Rumex crispus seeds were planted. The treatment solution was prepared as follows: 50 mg of the biologically active substance were dissolved in 3 ml of acetone containing 1% Tween 20. The next day, each solution was sprayed with furrow at the rate of 9 kg of the test compound in 313 liters of water per acre. Two weeks after the treatment, observations were made.

Table I

Note. g {"C-Isomer of Compound 1. hms-Isomer of Compound 14. + slight damage (25– + + moderate damage destroyed (55-65% destroyed); + + + strong damage (85-100% destroyed). For the expression of the total activity for all seven varieties of weed plants used activity index - the sum of all the benefits. Index 21 means the complete destruction of seven varieties of weeds. The test results are shown in Table 2. Table 2

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Subject invention

Use as a herbicide of compounds of the general formula

R R1 R2

Aryl —C — CH — O — C — N /

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where aryl means phenyl, naphthyl, phenyl or naphthyl, substituted by halogen, lower alkyl, lower alkoxygroup, phenyl, substituted methylenedioxy in 3 and 4 positions;

R and R are hydrogen, lower alkyl, chlorine or bromine;

R is hydrogen, lower alkyl, phenyl;

R and R are hydrogen, alkyl, lower alkenyl, carbethoxymethyl, phenyl, or phenyl substituted by halogen, lower alkoxygroup, lower alkyl, or nitrocarbon. Example 2. Post-travel processing. The seeds of Dlgitaria sanguinalls, Echinocloa crusgalli, Avena sativa, Brassica juncea, Rumex crispus and Phaseolus vulgaris were planted in boxes. 10–14 days after sowing, when the primary leaves of the legume plant were almost completely dissolved and trifoliate leaves began to form, the plants were sprinkled. The spray solution was prepared as follows: 50 mg of the biologically active compound was dissolved in 5 ml of acetone containing 1% tween, and then 5 ml of water was added. The solution had a concentration of 0.5% and was designed at the rate of 22.4 kg 1 ha. Observations were performed 14 days after treatment. Apply the specified rating system. The maximum activity index was 18, which is the sum of the pluses obtained from the use of six plant varieties.