RU2347365C1 - Herbicide composition - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: herbicide composition in form of emulsifiable concentrate includes, wt %: 2-metoxy-dichlor-benzoic acid and/or its ethers of normal or isometric structure containing in etherifying groups up to 10 atoms of carbon, individually or in combination -20-80; replaced sulfonalcarbamide - 0.5-3.5, a surface-active substance - 0-35, tertiary alkylamine containing two alkyl radicals of normal or isometric structure with carbon atomic number from C₁ to C₁₀ and one alkyl radical of normal or isometric structure with carbon atomic number from C₄ to C₃₀ - 1.0-50, solvent - the rest.

EFFECT: herbicide emulsifiable concentrate is characterised with low rate of application of reactant and preparation, with high stability of working emulsion prepared out of concentrate after storing at subzero temperatures and with high herbicide efficiency.

3 cl, 2 tbl, 16 ex

Description

The invention can be used in agriculture to combat perennial root shoots and broadleaf weeds in crops of grain 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 pesticides and poison 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 toxic chemicals 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. A01N 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 a suspoemulsion concentrate 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 dispersant stabilizer, 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 herbicidal activity.

The closest in technical essence and the achieved result to the claimed technical solution is a herbicidal emulsifiable concentrate according to the patent of the Russian Federation No. 2290811, containing 2-methoxy-3,6-dichlorobenzoic acid or its ester, primary, secondary or tertiary amine, substituted sulfonylurea, surface-active compound and solvent.

The disadvantage of this solution is poor frost resistance. After storage at sub-zero temperatures, dicamba, sulfonylurea and their amine salts precipitate from the concentrate to precipitate, which contributes to the uneven distribution of herbicides on the treated surface and the deterioration of the biological activity of the composition.

Given that most of the herbicidal preparations in our country are stored with the consumer in unheated rooms, this drawback becomes significant.

The objective of the present invention is to improve frost resistance, increase the herbicidal activity of the composition, reduce the norms of use of the active substance and the preparation.

The problem is solved by using in a herbicidal composition comprising 2-methoxy-3,6-dichlorobenzoic acid and / or its normal or isostructure esters containing up to 10 carbon atoms in esterified groups, individually or in combination, a tertiary alkylamine containing two alkyl normal or isostructure radical with the number of carbon atoms from C ₁ to C ₄ and one normal or isostructure radical with the number of carbon atoms from C ₄ to C ₂₀ , which allows to maintain the concentrate uniformity at minus temperature (table 1, column 7), stabilize the emulsion (table 1, column 8), reduce the particle size of the dispersed phase (table 1, column 9), which increases the herbicidal activity of the claimed composition in comparison with the prototype (table 2 )

The proposed composition contains the following components (wt.%):

2-methoxy-3,6-dichlorobenzoic acid or its ester normal or iso-construction С ₁ -С ₁₀ or their mixture 20-80 substituted sulfonylurea 0.5-3.5 surface-active substance 0-35 tertiary alkylamine 1-50 solvent rest

As a substituted sulfonylurea in the composition, chlorosulfuron, or nicosulfuron, or bensulfuron-methyl, or sulfomethuron-methyl, or dimethylsulfuron, or triasulfuron, or primisulfuron, or metsulfuron-methyl, or tribenuron-methyl, or chlorimuron-ethyl, or t .

As a surfactant, syntanol DS-10, syntanol ALM-10, OP-7, OP-10, neonol AF 9-10, neonol AF 9-12, emulsogen, tensiofix, sorpol, atlox, vetol are used.

The solvent used is xylene, an oil or coal solvate, cyclohexanone, Nefras AR 120/200 or Nefras A 150/330, kerosene, diesel fuel.

Example 1. Mix 69 g of isooctyl ether of dicamba, 2.2 g of chlorosulfuron, 20 g of neonol AF 9-12, 6.6 g of tretalkylamine (R ₁ = C ₁ , R ₂ = C ₁ , R ₃ = C ₁₂ ÷ C ₁₄ ) and 2.2 g of Nefras A 150/330. The mixture is heated in a water bath at 30-35 ° C until complete dissolution of the components with the formation of a transparent organic solution. The resulting concentrate is kept in an N-180 ultra-cryostat at a temperature of minus 10 ° C for 7 days. At the end of the aging, the concentrate is allowed to warm to room temperature (20 ÷ 22 ° C), after which its appearance is evaluated. Emulsify 2 g of the concentrate in 98 g of distilled water and maintain the emulsion in the sump for 4 hours. The average particle size of the dispersed phase of the emulsion is determined by optical microscopy.

Example 2

73.4 g of dicamba methyl ester, 2.2 g of metsulfuron-methyl, 20 g of neonol AF 9-10, 3.3 g of tert are mixed. alkylamine (R ₁ = C ₁ , R ₂ = C ₃ , R ₃ = C ₆ ) and 1.1 g of cyclohexanone. Further, as in example 1.

Example 3

75.6 g of dicamba ethyl ester, 2.2 g of tifensulfuron-methyl, 18 g of syntanol DS-10, 2.2 g of tert. Alkylamine are mixed (R ₁ = C ₄ , R ₂ = C ₂ , R ₃ = C ₉ ) and 2 g of xylene petroleum. Further, as in example 1.

Example 4

Mix 42 g of dicamba, 2.2 g of tribenuron-methyl, 2 g of OP-7, 46 g of tert. alkylamine (R ₁ = isoC ₄ , R ₂ = C ₁ , R ₃ = C ₁₃ ) and 7.8 g of coal tar solvent. Further, as in example 1.

Example 5

Mix 20 g of dicamba, 0.5 g of triasulfuron, 24 g of tert. alkylamine (R ₁ = C ₃ , R ₂ = C ₂ , R ₃ = C ₁₈ ) and 55.5 g of nefras AR 120/200. Further, as in example 1.

Example 6

60.5 g of dicamba butyl ether, 1.2 g of dimethyl sulfuron, 35 g of syntanol ALM-10, 1 g of tert are mixed. alkylamine (R ₁ = C ₁ , R ₂ = C ₄ , R ₃ = iso-C ₁₂ ) and 2.3 g of oil solvent. Further, as in example 1.

Example 7

70 g of dicamba octyl ether, 10 g of dicamba, 3.5 g of chlorosulfuron, 10 g of sorpol, 5.5 g of tert are mixed. alkylamine (R ₁ = iso-C ₃ , R ₂ = C ₁ , R ₃ = C ₂₀ ) and 1 g of coal xylene. Further, as in example 1.

Example 8

45 g of dicamba, 2.5 g of nicosulfuron, 2 g of OP-10, 50 g of tert are mixed. alkylamine (R ₁ = C ₄ , R ₂ = C ₁ , R ₃ = C ₄ ) and 0.5 g of cyclohexanone. Further, as in example 1.

Example 9

32 g of dicamba, 20 g of dicamba isobutyl ether, 2.8 g of bensulfuron-methyl, 5 g of tensiofix, 35 g of tert.-alkylamine (R ₁ = C ₂ , R ₂ = iso-C ₄ , R ₃ = C ₈ ) are mixed and mixed 5.2 g nephras A 150/330. Further, as in example 1.

Example 10

Mix 80 g of dicamba ester of C ₇ -C ₉ alcohols, 3.5 g of sulfomethuron-methyl, 10 g of emulsogen, 5.5 g of tert. alkylamine (R ₁ = C ₁ , R ₂ = iso-C ₃ , R ₃ = iso-C ₁₈ ) and 1 g of kerosene. Further, as in example 1.

Example 11

45 g of dicamba decyl ether, 2.5 g of primisulfuron, 15 g of neonol AF 9-10, 5 g of tert are mixed. alkylamine (R ₁ = C ₁ , R ₂ = C ₁ , R ₃ = C ₁₂ ÷ C ₁₄ ) and 32.5 g of nefras AR 120/200. Further, as in example 1.

Example 12

Mix 20 g of dicamba isooctyl ether, 0.5 g of chlorimuron-ethyl, 10 g of neonol AF 9-12, 1 g of tert. alkylamine (R ₁ = C ₂ , R ₂ = C ₃ , R ₃ = iso-C ₄ ) and 68.5 g of diesel fuel. Further, as in example 1.

Example 13 is a prototype.

Analogously to example 1. The difference is that as a tert. alkyl amines use diethylethanolamine.

Example 14 is a prototype.

Analogously to example 4. The difference is that as a tert. alkyl amines use triethanolamine.

Example 15 is a prototype.

Analogously to example 7. The difference is that instead of tert. alkyl amines use primary monoethanolamine.

Example 16

Biological tests of the herbicidal activity of the preparations are carried out under growing conditions on sunflower crops as a test object. Spraying with plant emulsions in pots with a volume of 1 dm ^{3 is} carried out in a phase of 4-6 leaves. The dose of herbicides is 100 g / ha. in total. The effectiveness of the herbicides is evaluated 2 weeks after treatment by comparing the weight of the plants in examples 1-15 with a control experiment (option without herbicides). Repeatability is three times. The reliability of the results of the effectiveness assessment is 95%. The synergism of the action of herbicides is calculated according to the Colby formula.

The data presented in table 1 indicate that the proposed composition (pr. 1-12) has frost resistance and gives a stable, highly dispersed emulsion in contrast to the prototype, where the formation of sediment from the concentrate and coagulate from the emulsion is observed (pr. 13-15) .

Vegetative tests of herbicides showed the advantage of the proposed composition for herbicidal activity in comparison with the prototype (table 2).

Table 1 Composition (%) and characteristics of herbicide formulations No. of examples Dicamba or its ether or a mixture thereof Urea sulfonyl Surfactant Amine Solvent Appearance of the concentrate after keeping it at minus 10 ° С for 7 days Characterization of a 2% emulsion prepared from a concentrate after keeping it at minus 10 ° С The average particle size of the dispersed phase, microns one 2 3 four 5 6 7 8 9 one. 69 2.2 twenty 6.6 2.2 Homogeneous, transparent Stable, no coagulum one 2. 73,4 2.2 twenty 3.3 1,1 - ”- - ”- one 3. 75.6 2.2 eighteen 2.2 2 - ”- - ”- one four. 42 2.2 2 46 7.8 - ”- - ”- 2 5. twenty 0.5 0 24 55.5 - ”- - ”- 3 6. 60.5 1,2 35 one 2,3 - ”- - ”- one 7. 80 3,5 10 5.5 one - ”- - ”- 2 8. 45 2.5 2 fifty 0.5 - ”- - ”- 2 9. 52 2,8 5 35 5.2 - ”- - ”- 2 10. 80 3,5 10 5.5 one - ”- - ”- 2 eleven. 45 2.5 fifteen 5 32,5 - ”- - ”- one 12. twenty 0.5 10 one 68.5 - ”- - ”- 3 13 is a prototype 69 2.2 twenty 6.6 2.2 crystalline precipitate Coagulate 1 cm ³ 25 14 is a prototype 42 2.2 2 46 7.8 - ”- - ”- 28 15 is a prototype 80 3,5 10 5.5 one - ”- - ”- 32

table 2 The result of vegetative experiments on sunflower No. of examples Consumption rate, g / ha Inhibition of plant mass,% Dicamba Sulfonylurea Actual Estimated Synergism one. 95 5 96 63 +33 2. 96.8 3.2 95 58 +37 3. 96.8 3.2 94 62 +32 four. 95 5 92 66 +26 5. 97.3 2.7 93 61 +32 6. 97.5 2.5 96 60 +36 7. 93.2 6.8 95 68 +27 8. 94.2 5.8 97 59 +38 9. 93.9 6.1 94 58 +36 10. 92.7 7.3 93 65 +28 eleven. 91.6 8.4 95 62 +33 12. 95.6 4.4 93 58 +35 13 is a prototype 95 5 66 63 +3 14 is a prototype 95 5 67 66 +1 15 prototype 93.2 6.8 62 68 -6 Dicamba 95 48 Chlorosulfuron 5 28 - “-“ - “- 6.8 38 Metsulfuron methyl 3.2 19 Tifenesulfuron methyl 3.2 26 Tribenuron methyl 5 thirty Triasulfuron 2.7 25 Dimethyl sulfuron 2.5 24 Nicosulfuron 5.8 21 Bensulfuron methyl 6.1 twenty Sulfometuron methyl 7.3 32 Primisulfuron 8.4 26 Chlorimuron ethyl 4.4 twenty The control plant weight 37.7 g

Estimated effect = E ₁ + E ₂ - E ₁ · E _2/100.

Claims (3)

1. A herbicidal composition comprising 2-methoxy-3,6-dichlorobenzoic acid or its esters containing in the esterified group up to 10 carbon atoms of normal or isostructure individually or in a mixture, substituted sulfonylurea and a tertiary amine, characterized in that it includes 2-methoxy -3,6-dichlorobenzoic acid and / or its C ₁ -C ₁₀ ethers of normal or isostructure individually or in a mixture, and the tertiary amine is presented as a tertiary alkylamine containing two normal or isostructural alkyl radicals with the number of carbon atoms from C ₁ to C ₄ and one alkyl radical of normal or isostructure with the number of carbon atoms from C ₄ to C ₃₀ , with the following ratio of components, wt.%:
2-Methoxy-3,6-dichlorobenzoic acid and / or its esters C ₁ -C ₁₀ normal or isostructure or a mixture thereof 20-80 Substituted Sulfonylurea 0.5-3.5 Surface-active substance 0-35 Tertiary alkylamine 1,0-50 Solvent Rest 2. The herbicidal composition according to claim 1, characterized in that it contains a substituted sulfonylurea selected from the group consisting of chloro-sulfuron, or nicosulfuron, or bensulfuron-methyl, or sulfometuron-methyl, or dimethyl sulfuron, or triasulfuron, or primisulfuron, or metsulfuron-methyl, or tribenuron-methyl, or chlorimuron-ethyl, or tifensulfuron-methyl. 3. The herbicidal composition according to claim 1 or 2, characterized in that it is presented in the form of an emulsifiable concentrate.