RU1826860C - Herbicide composition - Google Patents

Abstract

Use: for the destruction of weeds on fields with cereal crops, especially corn. SUMMARY OF THE INVENTION: the components are a pyridine sulfonamide derivative of the formula CON (© C M-OSI, N S07NHCONH- (CЈ ОCH3 (L)) the carrier is kaolin, finely divided silica or a mixture thereof and a surfactant is a mixture of compounds from the group consisting of sodium phenyl sulfonate, polycarboxylate sodium, sodium alkylaryl sulfonate, polyoxyethylene alkylaryl ether sulfate and the condensation product of sodium naphthalenesulfonate with formaldehyde Composition, May: A 10-80, carrier 7- 83.7, surfactant 6.3-13. 3 tab. E

Description

FIELD OF THE INVENTION This invention relates to chemical plant protection products and can be used to control weeds on fields of grain crops.

The purpose of the invention is to expand the field of use due to the gentle effect on corn.

This goal is achieved in that the herbicidal composition in the form of a wettable powder, comprising a pyridine sulfonamide derivative as an active substance, a carrier and a surfactant, as an active substance contains a compound of formula A

COMCHVh

fgfN OCH3

kNAS02NHCONH-4C

as a carrier, kaolin, finely divided silica or a mixture thereof; as a surfactant, a mixture of compounds selected from the group consisting of sodium phenyl sulfonate, sodium polycarboxylate, sodium alkylarylsulfonate, polyoxyethylene alkylaryl ether sulfate and the product of condensation of the following sodium naphthalene sulfonate sulfate, the ratio of components, wt.%:

active substance 10-80, carrier 7- 83.7, surfactant 6.3-13.

The claimed composition is prepared by mixing said components, followed by grinding to form a wettable powder. For biological testing, the following formulations were prepared.

00 1 CHE Os 00 ON O

With

EXAMPLE 1 (in wt.%). Compound A Kaolin

10 70.2

The product of the condensation reaction of sodium naphthalenesulfonate with formaldehyde 1.8 Polyoxyethylene alkyl aryl ether sulfonate 4.5

Microdispersed silica 13.5

PRI me R 2 (in wt.%). Sodium phenyl sulfonate b

Sodium Polycarboxylate 5

Sodium Alkyl Arylsulfonate 2

Micropowder silica 7 Compound A80

PRI me R 3 (in wt.%), Sodium phenyl sulfonate 4

Sodium Polycarboxylate 3

Sodium alkylaryl sulfonate 1

Kaolin42

Compound A50

The preparation of compound A is shown in Example 4.

Example 4. To a suspension obtained by adding 0.229 g of 2-aminosulfonyl-NN-dimethylnicotinamide and 0.275 g of 2-phenoxycarbonylamino-4,6-dimethoxypyrimidine to 5 ml of anhydrous acetonitrile, 0.152 g of 1.8 β-diazabicyclo 5.4, undecene and the resulting mixture was left for 1 h at room temperature. After completion of the reaction, the mixture was added to water to filter insoluble matter. The filtered solution was converted with concentrated hydrochloric acid into a weak acidic solution and extracted with methylene chloride. Then, the solution was dried with anhydrous sodium sulfate, the solvent was distilled off, and 0.330 g of the target compound, M- (4,6-dimethoxypyrimidin-2-yl) aminocarbonyl-3-dimethylaminocarbonyl-2-pyridinesulfonamide, mp. 169 173 ° C.

The compositions indicated in Examples 1-3 were subjected to biological tests. The test results are presented in examples 5-7 and in table. 1-3.

Example 5. For testing, the composition of Example 1 was used.

Each pot is filled with soil and seeded with a certain amount of seeds from various test plants. When the test plants have reached a certain stage (i.e., stage 2.2 leaf for corn, 2.0 leaf for fruit bush, 0.5 leaf for morning glory, 0.5 leaf for highlander pepper, 0.1 leaf for sternum prickly) the plants are sprayed with an aqueous solution prepared from a composition of 0.2 leaf for amaranth and a 2.0 leaf for chicken millet.

A leaf of plants is sprayed using a small sprayer. After 30 days, the degree of plant development is visually determined. Weed suppression is evaluated on a 10-point scale, on which 10 means that the plant has died completely, and 1 shows the same as the untreated plant, as shown in Table 1.

Test compound A: Compound of the present invention:

(drCON (CH V S02NHCONH4O (Au

 W

Test compounds B-D-typical compounds as claimed in USSR Patent No. 1097178

/ x 502CH (CH3) l

UT 2 b

4 S02NHCONH- O} (in

N-g-CH3

S02NHCONH4O (C)

GAGN- Chb

VS ° 2CH3H3

, / xrS02NHCONH4O) (D)

U1N- axis

U 02sn3osnz

The test results are shown in table 1.

PRI me R 6. Testing the composition of example 2.

Corn (varieties Golden cross ventum and

Royal Dent 105T), blood dewdrop, green bristle, oatmeal, black nightshade and highlander were sown in pots with an area of 1/10000 ara (a) each and grown in a greenhouse. After the experimental

the plants have reached the corresponding growth stages, i.e. stage 4 of the sheet for Golden cross vantum and stage 4.3 of the sheet for Royal Dent 105T, 3.3 leaves for the blood dewdrop, 3.3, leaves for the bristles of Zelenog, 2.3 sheets for the oatmeal, stage 2 sheets for the nightshade black and stage 3 leaves for the mountain pepper, they were sprayed with an aqueous solution prepared from the composition of example 2. After 27 days after spraying, the growth rate of the treated plants was visually determined. The degree of effectiveness of weed control was evaluated on a 10-point scale, where a value of 10 denoted a completely destroyed plant, and a value of 1 - plants that identified a completely destroyed plant, and a value of 1 - plants that wiped out similarly to control, untreated, as this is indicated in table 2.

EXAMPLE 7 Testing the composition of Example Z.

Corn (varieties Golden cross vantum and Royal Dent 105T) and rosemary were sown in pots with an area of 1 / 10,000 and each was grown in a greenhouse.

After the experimental plants reached the corresponding growth stages (i.e. 3.5 leaf stage for Golden cross vantum, 4 leaf stage for Poyal Dent 105T and 2.5 leaf stage for blood dewdrops), they were sprayed with an aqueous solution prepared from the composition of example 3.

After 27 days after spraying, the growth rate of the treated plants was determined visually. The effectiveness of weed control was evaluated on a 10-point scale, where a value of 10 meant a completely destroyed plant, and a value of 1 served to indicate plants that looked similar to the control, untreated, as indicated in Table 3.

As can be seen from the test results presented in table. 1-3 compositions with Compound A completely inhibit the growth of millet, which is weed, and have absolutely no effect on corn. In addition, the growth of broadleaf weeds, such as fruit bush, morning glory, spiny brisket, pepper mountaineer and amaranth, is sufficiently suppressed. Well known

compositions degrade corn growth. Therefore, the known compositions are not suitable for treating corn fields.

Claims (1)

The claims are a wettable powder herbicidal composition comprising a substituted pyridine sulfonamide derivative as an active substance, a carrier and a surfactant, characterized in that, in order to expand its field of application due to the gentle effect on corn, it is an active substance contains a compound of the formula CONlCHOl gyGN- N S02NHCONH4C Och Och as a carrier, kaolin, finely divided silica or a mixture thereof; as a surfactant, a mixture of compounds selected from the group consisting of sodium phenyl sulfonate, sodium poly-carboxylate, sodium alkylaryl sulfonate, polyoxyethylene alkylaryl ether sulfonate and the product of the condensation of naphthalene sulfin formaldehyde, in the following ratio of components, wt.%: Active substance 10-80 Media 7-83.7 Surface active substance 6.3-13.0. 40 Table Table 2 Table3