RU2296467C2 - Herbicidal suspended-emulsion concentrate and method for production thereof - Google Patents

Abstract

FIELD: agriculture, herbicides.

SUBSTANCE: claimed concentrate contains (mass %): 2-metoxybensoic acid esters containing C₁-C₁₀ carbon atoms in etherified groups 4-75; substituted sulfonylurea 1.0-2.5; surfactant 15-35; filler up to 100. Also described is method for production thereof comprising component blending followed by grinding in dispersion device to produce average particle size in dispersion phase of 2-4 mm.

EFFECT: composition of improved dispersiveness; stability and increased herbicidal activity.

4 cl, 2 tbl, 21 ex

Description

The invention can be used in agriculture to combat weeds in field crops.

Known herbicidal composition in the form of a water-glycol solution based on diethylethanolammonium salt of chlorosulfuron and dimethylammonium salt of 2-methoxy-3,6-dichlorobenzoic acid (dicamba) containing 17.5 g / l of chlorosulfuron and 368 g / l of dicamba [List of agrochemical pesticides and agrochemicals approved for use on the territory of the Russian Federation. M., 2003, p.232].

Known herbicidal composition in the form of an aqueous solution based on diethylethanolamine salts of dicamba and chlorosulfuron, containing 344 g / l of dicamba and 18.8 g / l of chlorosulfuron [List of pesticides and agrochemicals approved for use in the Russian Federation. M., 2003, p.233].

Known herbicidal composition for combating unwanted vegetation, consisting of a mixture of triasulfuron and dicamba with the addition of a surfactant, inactive ingredients, an organic solvent and water [Application EP No. 0236273, class. A 01 No. 47/36].

Known synergistic herbicidal composition for use in grain crops, including the ammonium salt of benzenesulfonylurea and dicamba, a surfactant, triethylene glycol and water [RF Patent No. 2040179].

The disadvantage of these compositions is the low chemical stability of sulfonylurea due to its hydrolysis, especially in the presence of water, which helps to reduce the herbicidal activity of the composition.

Known herbicidal composition in the form of suspoemulsion concentrate (prototype), containing dicamba in the form of esters of the C ₇ -C ₉ alcohol fraction, substituted sulfonylurea, emulsifier and solvent, which are adsorbed on the surface of the mixture, consisting of a stabilizer, dispersant, carrier and filler [RF Patent No. 2171578].

The disadvantage of this composition is the separation of the concentrate into two phases (liquid and solid) due to the low dispersion, as well as the relatively low stability of the working suspension emulsion, which contributes to the uneven distribution of the herbicide on the treated surface and, consequently, to a decrease in the herbicidal activity of the preparation.

The objective of the invention is to increase the dispersion of the composition, improve the stability of the working suspension emulsion, increase the herbicidal activity of the drug.

The problem is solved due to the fact that in the proposed herbicidal composition, 2-methoxy-3,6-dichlorobenzoic acid esters are represented by normal or isostructural esters containing up to 10 carbon atoms in esterified groups that are used individually or in combination. Moreover, the proposed composition contains the following components, wt.%:

C ₁ -C ₁₀ ester of 2-methoxy-3,6-dichlorobenzoic acid 40-75 Substituted Sulfonylurea 1-2,5 Surface-active substance 15-35 Filler rest

The solution to this problem is also achieved by the fact that the above components are mixed in the indicated proportions and ground using a dispersing device to achieve an average particle size of the dispersed phase of 2-4 microns. At the same time, an electromagnetic grinder, a vortex apparatus, a high-speed dissolver, a colloid mill, a bead mill, and a sonar apparatus are used as a dispersing device.

Chlorosulfuron, metsulfuron-methyl, tribenuron-methyl, chlorimuron-methyl, triasulfuron, dimethylsulfuron, tifensulfuron-methyl, primisulfuron, cinosulfuron, bensulfuron-methyl, nicosulfuron, sulfomethuron-methyl are used as substituted sulfonylureas.

Neonol AF 9-10, neonol AF 9-12, OP-7, OP-10, syntanol DSM-10, syntanol ALM-10 emulsogen, tensiofix, sorpol, vetol, atlox individually or in combination with alkylbenzenesulfonate are used as surfactants calcium, sulfonol, sodium lauryl sulfate, sulphite-alcohol stillage, concentrate of sulphite-yeast mash, powdery stillage concentrate.

As a filler of the proposed composition using white soot, aerosil, zeolites, kaolin, tripoli, chalk.

Example 1

64 g of dicamba methyl ester, 2.2 g of triasulfuron, 20 g of neonol AF 9-10 and 13.8 g of kaolin are mixed. The resulting suspension emulsion concentrate is placed in an electromagnetic grinder and dispersed to achieve an average particle size of the dispersed phase of 2 μm, which is determined by optical microscopy. The stability of the drug and the working suspension emulsion are evaluated.

Example 2

70 g of dicamba ethyl ester, 2 g of Metsulfuron-methyl, 25 g of Neonol AF 9-12 and 3 g of Aerosil are mixed. A vortex apparatus is used to disperse the composition.

Example 3

60 g of dicamba propyl ether, 1.5 g of tribenuron-methyl, 25 g of OP-7 and 13.5 g of zeolite are mixed. To disperse the composition using a high-speed dissolver.

Example 4

55 g of dicamba butyl ether, 1 g of chlorosulfuron, 35 g of OP-10 and 9 g of chalk are mixed. A colloidal mill is used to disperse the composition.

Example 5

40 g of dicamba amyl ether, 1.2 g of tifensulforon-methyl, 22 g of syntanol DS-10 and 36.8 g of tripoli are mixed. To disperse the composition using a bead mill.

Example 6

75 g of dicamba hexyl ester, 2.5 g of dimethyl sulfuron, 15 g of syntanol ALM-10 and 7.5 g of white carbon black are mixed. To disperse the composition using a sonar apparatus.

Example 7

64 g of dicamba heptyl ether, 2.2 g of chlorosulfuron, 15 g of neonol AF 9-10, 5 g of calcium alkylbenzenesulfonate and 13.8 g of kaolin are mixed. To disperse the composition using an electromagnetic grinder.

Example 8

70 g of dicamba octyl ether, 2 g of tribenuron-methyl, 20 g of neonol AF 9-12, 5 g of sulfonol and 3 g of aerosil are mixed. A vortex apparatus is used to disperse the composition.

Example 9

60 g of dicamba nonyl ester, 1.5 g of metsulfuron-methyl, 20 g of OP-7, 5 g of sodium lauryl sulfate and 13.5 g of zeolite are mixed. To disperse the composition using a high-speed dissolver.

Example 10

55 g of dicamba decyl ether, 1 g of tifensulfuron-methyl, 25 g of OP-10, 10 g of sulphite-alcohol stillage and 9 g of chalk are mixed. A colloidal mill is used to disperse the composition.

Example 11

40 g of dicamba ether of the C ₇ -C ₉ alcohol fraction are mixed, 1.2 g of triasulfuron, 15 g of syntanol DS-10, 7 g of sulphite-yeast brew concentrate and 36.8 g of tripoli. To disperse the composition using a bead mill.

Example 12

75 g of dicamba isooctyl ether, 2.5 g of dimethylsulfuron, 10 g of syntanol ALM-10, 5 g of powder stillage concentrate and 7.5 g of soot are mixed. To disperse the composition using a sonar apparatus.

Example 13

64 g of dicamba n-octyl ester, 2.2 g of nicosulfuron, 20 g of emulsogen and 13.8 g of kaolin are mixed. To disperse the composition using an electromagnetic grinder.

Example 14

70 g of dicamba isooctyl ether, 2 g of bensulfuron-methyl, 25 g of tensiofix and 3 g of aerosil are mixed. A vortex apparatus is used to disperse the composition.

Example 15

60 g of dicamba ether are mixed with the C ₇ -C ₉ alcohol fraction, 1.5 g of sulfomethuron-methyl, 25 g of sorpol and 13.5 g of zeolite. To disperse the composition using a high-speed dissolver.

Example 16

55 g of dicamba butyl ether, 1 g of primisulfuron, 35 g of vetol and 9 g of chalk are mixed. A colloidal mill is used to disperse the composition.

Example 17

40 g of dicamba decyl ether, 1.2 g of chlorimuron-ethyl, 22 g of atlox and 36.8 g of tripoli are mixed. To disperse the composition using a bead mill.

Example 18 is a prototype.

Analogously to example 7. The difference is that the dispersing device is not used.

Example 19 is a prototype.

Analogously to example 11. The difference is that the dispersing device is not used.

Example 20 is a prototype.

Analogously to example 12. The difference is that the dispersing device is not used.

Example 21

Field experiments are carried out on wheat crops. The compositions according to examples 1-20 are introduced into the tillering phase according to the growing culture. Weed vegetation - field sow thistle, mustard, bindweed, tenacious bedstraw, chamomile, species of pikulniks, highlanders. The dose of the herbicide is 80 g per hectare. The effectiveness of herbicides is estimated by the weight of weeds in the experimental and control plots in the phase of wheat maturation. Accounting for crops is carried out by threshing wheat. The area of the plots is 10 square meters, the repetition is fourfold, NDS ₀₉₅ , taking into account the yield of ± 0.4 centner / ha.

The data in table 1 show that the proposed composition (examples 1-17) has high stability and dispersion and gives a high-quality working suspension emulsion in comparison with the prototype (examples 18-20).

The results of field experiments on wheat (Table 2) indicate that the proposed composition exceeds the prototype in herbicidal activity, which gives an increase in grain yield of 5.9 ÷ 7.4 c / ha, and when using the prototype - only 2.4 ÷ 3 0 t / ha.

Table 1. Composition (%) and characteristics of herbicide formulations No. of examples Ether of Dicamba Urea sulfonyl Surfactant Filler Concentrate Characteristics Characterization of 2% suspoemulsion The average particle size of the dispersed phase, microns one. 64 2.2 twenty 13.8 Stable Stable, no coagulum 2 2. 70 2 25 3 Stable Stable, no coagulum 2 3. 60 1,5 25 13.5 Stable Stable, no coagulum four four. 55 one 35 9 Stable Stable, no coagulum four 5. 40 1,2 22 36.8 Stable Stable, no coagulum 3 6. 75 2,5 fifteen 7.5 Stable Stable, no coagulum 3 7. 64 2.2 twenty 13.8 Stable Stable, no coagulum 2 8. 70 2 25 3 Stable Stable, no coagulum 2 9. 60 1,5 25 13.5 Stable Stable, no coagulum four 10. 55 one 35 9 Stable Stable, no coagulum 3 eleven. 40 1,2 22 36.8 Stable Stable, no coagulum 2 12. 75 2,5 fifteen 7.5 Stable Stable, no coagulum 3 13. 64 2.2 twenty 13.8 Stable Stable, no coagulum 2 fourteen. 70 2 25 3 Stable Stable, no coagulum 2 fifteen. 60 1,5 25 13.5 Stable Stable, no coagulum 2 16. 55 one 35 9 Stable Stable, no coagulum 3 17. 40 1,2 22 36.8 Stable Stable, no coagulum four 18 is a prototype 64 2.2 twenty 13.8 Bundle coagulate 1.5 cm ³ 28 19 is a prototype 40 1,2 22 36.8 Bundle coagulate 1.3 cm ³ 25 20 is a prototype 75 2,5 fifteen 7.5 Bundle coagulate 1.8 cm ³ thirty

table 2 The results of field experiments on wheat No. of examples Inhibition of weed weight,% Wheat crop Root shoots Broadleaf Actual Estimated Synergism Actual Estimated Synergism C / ha ± one. 95 58 37 98 fifty 48 26.7 +7.2 2. 96 69 27 98 62 36 26.5 +7.0 3. 94 58 36 95 53 42 25.8 + 6.3 four. 95 57 38 96 55 41 25.8 + 6.3 5. 92 61 31 97 51 46 25.9 +6.4 6. 94 63 31 96 63 33 25,4 +5.9 7. 97 57 40 98 55 43 26.9 +7.4 8. 95 58 37 96 53 43 26.5 +7.0 9. 93 69 24 97 62 35 26.5 +7.0 10. 96 61 35 98 51 47 26.7 +7.2 eleven. 97 58 39 97 fifty 47 25.8 + 6.3 12. 96 63 33 95 63 32 25.7 + 6.2 13. 92 62 thirty 95 55 40 26.0 +6.5 fourteen. 90 59 31 96 54 42 25.6 + 6.1 fifteen. 94 61 33 98 60 38 26.5 +7.0 16. 98 63 35 98 63 35 26.2 + 6.7 17. 91 59 32 98 53 45 26.6 +7.1 18 is a prototype 67 57 10 69 55 fourteen 22.0 +2.5 19 is a prototype 68 58 10 70 fifty twenty 22.5 +3.0 20 is a prototype 64 63 one 66 63 3 21.9 +2.4 Dicamba 46 28 Triasulfuron 23 thirty Metsulfuron methyl 43 47 Tribenuron methyl 22 35 Chlorosulfuron twenty 38 Tifensulfuron- Methyl 28 32 Dimethyl sulfuron 32 48 Nicosulfuron thirty 38 Bensulfuron methyl 25 36 Sulfometuron- methyl 28 45 Primisulfuron 32 48 Chlorimuron ethyl 24 35 Control (without herbicides) 19.5 Estimated effect = E ₁ + E ₂ -E ₁ · E _2/100

Claims (4)

1. A herbicidal suspoemulsion concentrate comprising substituted sulfonylurea, normal or isostructured 2-methoxy-3,6-dichlorobenzoic acid esters, a surfactant and excipient, characterized in that the 2-methoxy-3,6-dichlorobenzoic acid esters are esters, containing up to 10 carbon atoms in esterified groups, with the following ratio of components, wt.%: C ₁ -C ₁₀ esters of 2-methoxy-3,6-dichlorobenzoic acid 40-75 Substituted Sulfonylurea 1.0-2.5 Surface-active substance 15-35 Filler Rest 2. The herbicidal composition according to claim 1, characterized in that it contains a substituted sulfonylurea selected from chlorosulfuron or metsulfuron methyl, or tifensulfuron methyl, or triasulfuron, or dimethyl sulfuron, or nicosulfuron, or bensulfuron methyl, or sulfomethuron methyl or primisulfuron, or tribenuron-methyl, or chlorimuron-methyl, or cinosulfuron. 3. The method of producing suspoemulsion concentrate according to claim 1 or 2, which consists in mixing the components in the indicated proportions according to claim 1 and then grinding them using a dispersing device to achieve an average particle size of the dispersed phase of 2-4 microns. 4. The method according to claim 3, characterized in that as a dispersing device using an electromagnetic grinder, or a vortex apparatus, or a high-speed dissolver, or a colloidal mill, or a bead mill, or a sonar apparatus.