SU668565A3 - Herbicide - Google Patents

Description

(54) HERBICID MEANS

The forms of application of the herbicidal agent according to the invention are common: solutions, emulsions, pastes, rtorses, etc.

They are prepared by known methods.

Recommended doses of active ingredients are within 0,

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10 kg / ha, depending on the method of their use and the type of weeds,

Table 1 shows the compounds of the general formula and the results of testing the herbicidal agent according to the invention in comparison with the known germs of this type of bicides.

Table 1 Tables 1-12 present the results of testing the herbicidal activity of the compounds. The numbers of the compounds in these tables correspond to their numbers in Table 1. I. Tests in greenhouses. Paper cups, impregnated with paraffin, with a capacity of 200 cm, serve as vessels for cultivation, and clay from sandy soil, with approximately 1.5 wt.% Of aeregne, as a substrate. Seeds of test plants divided by species are sown superficially in them. Immediately thereafter, the active substance is applied (pre-emergence treatment). For this, it is suspended or emulsified in water and sprayed onto the surface of the soil with the help of thin nozzles. Before chemical treatment, the vessels are lightly irrigated in order for the product to come into contact with wet soil. After the addition is made, the sump is covered with a transparent plastic cap until the plants grow. This coating prevents the evaporation of water and easily volatile substances. At the same time, it contributes to the uniform germination of the test plants, if the latter are not exposed to the action of chemicals. During the post-emergence treatment, plants are allowed to grow, depending on their species, in vegetative vessels up to 3-10 cm and then treated. They are not covered. In accordance with the temperature required for the test plants, the tests are carried out in the cold part of the greenhouse (IC-ZO C) or in the warm part (18-30 C). Ishitani continue to 2.5 to 6 weeks. During this time, I take care of the plants and evaluate their response to individual treatments. The test substances of the consumption rate of the active substance in kg / ha in each case and the types of test plants are listed in Table 222. The assessment is made on the scale of OJU. At the same time, O means that there are no damages or shoots, they are normal, and 100 are completely killed, or not shoots II. Experiments on open ground. 1 sp (test about using a sprinkling device mounted on a carrier for spraying on separate cases. Mostly used are pre-sowing methods and a pre-emergence treatment method. For some tests, the effect exerted by the spray agent during the sprouting of cultivated and weed grasses, and in the post-emergence method - after the formation of several true LISIs. All tests were carried out for several months and at this time they were evaluated at various intervals x on a scale from 0 to 100. III. Herbicidal action through the vapor phase. Based on this significant herbicidal action of isoxazolyl methylthiolcarbamate, even if these substances are not applied to the soil, which is necessary with the known thiolcarbamate, it can be assumed that The losses of active substance due to evaporation of these compounds are very insignificant.To prove this superiority, the following tests were carried out: a delicate variety of cultivated oats is sown as described in section 1 and treated with herbicidal active and substances in different dosage. After that, however, the vessels are not covered with plastic caps, but placed in pairs in 5-liter cylinders. The vapors consist of one treated and one untreated vessel. Control cylinders are also prepared with untreated pots for comparison. To prevent the exchange of gases with the external environment, the edges of the cylinder are smeared with petroleum jelly and covered the openings with a glass plate. Easily evaporating active substances can thus volatilize the soil surfaces of the treated vessels into the cylinder space and affect the germination and development of the test plants in the initially free from the active vessels of the standing vessels. Tempeatura B of glass cylinders ranges from 11 ° C in the mornings to 30 ° C to – .rt g-purge 7668565 Effect on weeds in greenhouses at 8 Table 2 pre-emergence treatment

Note; . -NyY-diethyl-3- (4-chlorobenzyl) thiol-carbamate-N, Y-dipropyl-5.-etyl-thiol carbamate, Destruction of undesirable plants and compatibility of cultivated plants in relation to thiodocarbamate in a greenhouse during pre-emergence T b b and c 3

Continued Table 3 Notes

Continued table. 3 e-3-ethylhexamethylene yldanothiolcarbamate, N-diisopropyl-5-2, 3-dichloroallylthiolcarbamate

13

Table 4

An example of a herbicidal action of isoxaolylthiolcarbamate with pre-hollow and post-emergence primetium in a greenhouse.

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Table 5

Selective control of weed plants in beet cultures by means of various thiol-carbamates on open ground during pre-sowing treatment. Part: A - pre-emergence Note: -N, K-di-dize treatment; B - after-, propyl-5-2,3,3-trichloroallyl-seed treatment. thiol carbamate Compatibility of some thiol carbamate with respect to fpancy and summer wheat on open ground for presowing treatment Table 6

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The effect of some thiol carbamates on the method of application to open ground

Note. Method of application: 1 - introduction into the soil, before sowing; II - pre-emergence treatment after sowing; III - spraying during germination; IV - post-harvest processing.

Phytotoxicity of the vapor phase of some thiol-carbamates against cultured oats in a model experiment

T

Table

Selective herbicidal action in rice crops with pre-emergence application in the greenhouse

Herbicidal action and compatibility of cultivated plants in relation to some thiol-carbamate in the greenhouse. for pre-emergence note:

Effect of 3-methyl-5-isoxazolylmethyl-S, L-diisopropylthiol carbamate in pre-emergence application without soil application on open ground

18

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T and b and t; a 9

Table

10 S-ethyl-S-cyclohexyl-3-ethylthiolcarbamate, table 11

nineteen

Herbicidal action and compatibility of cultivated plants with some tiapcarbamates in a greenhouse with post-emergence

application

Claims (3)

1. The patent of Germany WH42464, 45 e 9/12, 1972. C with. 2. Japanese Patent No. 48-8812, cl. 30 F 371.221,1973. 3. The patent of US 3175897, cl. 71-2.6, 1965.