RU2376762C2 - Herbicidal composition and method to fight weed plants - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: herbicidal composition is described, which includes alkyl-iso-C₈ or C₇-C₉ ether of 2,4-dichlorophenoxyacetic acid (1), synergist - salts of 3,6-dichloro-0-anisic acid with tertiary aliphatic amines (11), surfactants, dissolvent. Method to fight bilobate weed plants is also described.

EFFECT: production of preparation stable in storage in the form of emulsion concentrate, having high synergetic herbicidal activity of 2-ethylhexyl or low-volatility C₇-C₉ ether of 2,4-dichlorophenoxyacetic acid with suggested amine salts of 3,6-dichloro-0-anisic acid.

3 cl, 4 tbl, 26 ex

Description

The invention relates to the field of agriculture, namely to chemical means of weed control in crops of grain crops, corn and other land-use objects.

The use of 2,4-dichlorophenoxyacetic acid (2,4-D) octyl ester for controlling dicotyledonous weeds is known, but it is not active enough against a number of annual and perennial dicotyledonous weeds resistant to 2,4-D - types of highlander, chamomile, stalk , field bindweed, field sow thistle. (Melnikov N.N. et al. Pesticides and plant growth regulators. M: Chemistry, p. 62, 1995).

It is known to use dicamba (3,6-dichloro-0-anisic acid) as an additive to chlorphenoxyacetic acid preparations to expand the spectrum of the herbicidal action of 2,4-D (British Patent No. 1058314, 1967). The composition at a rate of 0.75-1.2 l / ha has good activity against annual dicotyledonous weeds, but is not effective enough against perennial root weeds.

Known synergistic herbicidal composition in the form of an emulsion concentrate based on 2,4-D esters and dicamba, where esterified groups contain up to 10 carbon atoms, surfactants contain sodium lauryl sulfate and sodium lignosulfonate, diluent contains kerosene (US Patent No. 3297427, 1967). The composition has a low concentration of active substances and insufficiently high stability. The dispersion of the working aqueous emulsion of this drug is low due to insufficient surface activity of anionic surfactants, which in aggregate affects its herbicidal properties.

Known herbicidal composition based on n-C ₇ -C ₉ esters of 2,4-D and nC ₇ -C ₉ dicamba esters, where surfactants use ethoxylated alkyl phenol or in combination with calcium alkyl benzene sulfonate, the solvent is a mixture of aromatic hydrocarbons (Patent RU 2072226 C1, 1997). Derivatives of 2,4-D and dicamba (in terms of 100% AI) are at a ratio of (5-12): 1, concentration of 39-45%. The composition has high herbicidal properties in relation to a wide range of dicotyledonous weed vegetation, but is not effective enough for field bindweed, stalk. The herbicidal composition based on 2,4-D 2-ethylhexyl esters and dicamba possesses similar properties in a mass ratio of (6-7): 1, in which a mixture of ethoxylated castor oil and calcium dodecylbenzenesulfonate is used as a surfactant in a ratio of 1: (1.5 -2.0), and as a solvent - kerosene or xylene (Patent RU 2266646 C1, 2005).

Known herbicidal composition based on derivatives of chlorophenoxyacetic acids, including n-octyl or n-C ₇ -C ₉ alkyl ether 2,4-D - 12-43%, synergist-N-cyclohexanone-0- (2-methoxy-3 , 6-dichlorobenzoyl) oxime - 10-20%, surfactant - 15-20%, solvent - the rest is up to 100% (Patent RU 2073973 C1, 1997). This composition, having high activity in relation to weeds, is not selective enough for grain crops.

Known herbicidal composition in the form of an emulsion concentrate based on n-octyl or n-C ₇ -C ₉ alkyl ether 2,4-D- 59.3-70.4%, synergist-N-cyclohexanone-0- (2-methoxy- 3,6-dichlorobenzoyl) oxime - 2-8%, surfactant - 11-20%, solvent - the rest is up to 100% (Patent RU 2073974 C1, 1997 - prototype). The drug, having high activity in relation to a wide range of dicotyledonous weeds, is not effective enough on field bindweed and field sow thistle.

The aim of the invention is to develop a more effective herbicidal composition based on derivatives of dicamba and esters of chlorophenoxyacetic acids.

This goal is achieved due to the fact that dicamba in the form of salts with tertiary amines is additionally added to the emulsion concentrate of a herbicidal composition based on 2-ethylhexyl or low-volatile C ₇ -C ₉ esters 2,4-D (1), including an organic solvent and surfactant.

In the proposed composition, technical 2,4-D 2-ethylhexyl ether is used, obtained by esterification of 2,4-D acid with alcohols of isonormal structure; 2-ethylhexanol or C ₇ -C ₉ alcohols, which in the vast majority are C ₈ alcohols. The content of the active substance in terms of 2,4-D acid in the technical ether of 2,4-D is 56-66% and mainly depends on the degree of esterification and distillation of the excess alcohol after esterification.

As surfactants, they are used traditionally for emulsion concentrates, neonogenic (neonol AF 9-12, OP-10, syntanol DS-10, etc.) and anionic (ABSK) substances, most often selected from the group of polyoxyethylated and polyethoxypropylated fatty alcohols or alkyl phenols or mixtures thereof with calcium alkylbenzenesulfonate, etc.

Aromatic hydrocarbons — xylene, petroleum solvents or Nefras A 120/200 or Nefras A 150/330, obtained from catalytic reforming products at temperatures of 120-200 ° C and 150-330 ° C, respectively, are used as a solvent for the emulsion concentrate; saturated hydrocarbons (kerosene), ketones (methyl isobutyl ketone, cyclohexanone), amides (dimethylformamide), cyclic compounds (N-methylpyrrolidone, N-methylcaprolactam, butyrolactone), highly polar solvents - dimethyl sulfoxide, alcohols and other organic chemistry products used to prepare pesticides.

The new herbicidal composition is used to control annual dicotyledonous weed plants resistant to 2,4-D and MCPA, including species of highlander, veronica, pikulnik, chamomile, smoky, calendula, umbilical field, field thorium, field violet and perennial dicotyledonous by weeds: types of butyx, sow thistle, mouse peas, field bindweed, wild lettuce and many others.

A method of controlling weeds includes the treatment of vegetative dicotyledonous weeds by uniformly spraying crops during tillering of crops, in the phase of 3-5 leaves of corn and sorghum, in pairs and degraded arable land at a height of annual and perennial dicotyledonous weeds up to 15-20 cm.

The optimal consumption rates of the new herbicidal composition for crops are 250-400 g / ha, for corn 300-500 g / ha, on vapors and degraded arable land 350-1000 g / ha for the active substance, depending on the weed flora, the rate of clogging, natural -climatic conditions.

The synergistic effect of dicamba amine salts and 2,4-D esters was determined as the difference between the actual herbicidal activity and the expected (additive) activity, which was calculated using the Colby formula (Colby SR, “Calkulating synergistic and antagonistic responses of herbicide combination”, Weeds, Volume 15 , pp. 20-22; 1967).

E is the estimated expected efficiency (%),

X is the activity of the first substance (%),

Y is the activity of the second substance (%).

If the actual value of the herbicidal activity of the mixture is higher than the calculated expected effect (E), then the activity of the combination is super-additive (convergent), that is, there is a synergistic effect.

Example 1. In a laboratory reactor, load: 55.0 g of 2-ethylhexyl ether of 2,4-dichlorophenoxyacetic acid (35 g in terms of 2,4-D), 8.5 g of dimethyl octylamine salt of 3,6-dichloro-0-anisic acid (5 g in terms of dicamba), then, when heated to 40-50 ° C, dissolve in 12.0 g of kerosene and 4.5 g of cyclohexanone, then add 20 g of OP-10 and bring to a homogeneous state with stirring. After cooling to room temperature, 1 g of the obtained concentrate is emulsified in 99 g of water and kept in a sump for 4 hours.

Example 2. Analogously to example 1.

The difference is that instead of dimethyl octylamine salt, dicamba take 9.2 g of dicamba dimethyldecylamine salt (5.0 g in acid). As a solvent, 12.0 g of kerosene and 7.8 g of dimethylformamide are used. As surfactants take 12.0 g of OP-10 and 4.0 g of calcium alkylbenzenesulfonate (ABSK).

Example 3. Analogously to example 1.

The difference is that instead of dimethyl octylamine salt, dicamba take 9.4 g of dicamba dimethyl laurylamine salt (5.0 g in acid). As a solvent, 12.0 g of kerosene and 3.6 g of N-methylpyrrolidone are used. As surfactants take 15.0 g of syntanol DS-10 and 5.0 g of ABSK.

Example 4. Analogously to example 1.

The difference is that instead of dimethyl octylamine salt, dicamba take 9.7 g of dimethylalkyl-C ₁₂ -C ₁₄ amine salt of dicamba (5.0 g in acid). As a solvent, 23.0 g of xylene and 5.3 g of cyclohexanone are used. 5.0 g of neonol AF 9-12 and 2.0 g of ABSK are taken as surfactants.

Example 5. Analogously to example 1.

The difference is that instead of dimethyloctylamine salt, dicamba take 8.4 g of the triethanolamine salt of dicamba (5.0 g acid). As a solvent, 8.8 g of AP 150/330 nephras and 8.8 g of C ₇ -C ₉ alcohols are used. As surfactants take 15.0 g of neonol AF 9-12 and 4.0 g of ABSK.

Example 6. The reaction flask was charged with: 55.0 g of 2,4-dichlorophenoxyacetic acid 2-ethylhexyl ester (35.0 g in terms of 2,4-D), 11.0 g of dimethylalkyl-C ₁₂ -C ₁₈ -amine salt of 3,6-dichloro -0-anisic acid (5.0 g in terms of dicamba), 11.0 g of nefras A150 / 330, stirred for 1 hour at a temperature of 40-50 ° C, then add 11.0 g of alcohols C ₇ -C ₉ , 8.0 g neonol AF 9-12 in combination with 4.0 g ABSK. The reaction mixture is stirred for 1 hour while heating, bringing to a homogeneous state. Further, as in example 1.

Example 7. Analogously to example 6.

The difference is that instead of dimethylalkyl-C ₁₂ -C ₁₈ amine salt of dicamba, 7.2 g of dicamba dimethylethanolamine salt (5.0 g in terms of dicamba), 13.4 g of A150 / 330 nephras and 12.4 g of benzyl alcohol are introduced.

Example 8. Analogously to example 6.

The difference is that instead of dimethylalkyl-C ₇ -C ₉ -amine salt of dicamba, 8.2 g of tripropylamine salt of dicamba (5.0 g in terms of dicamba) and 12.4 g of nephras A 150/330 and xylene are introduced.

Example 9. The reaction flask was charged with 65.0 g of 2,4-dichlorophenoxyacetic acid 2-ethylhexyl ester (42 g in terms of 2,4-D), 9.7 g of dimethylalkyl-C ₁₂ -C ₁₄ -amine salt 3 , 6-dichloro-0-anisic acid (5.0 g in terms of dicamba), 1.3 g of the monoethanolamine salt of 3,6-dichloro-0-anisic acid (1.0 g in terms of dicamba). The reaction mixture is heated to 40-50 ° C and stirred, then add 10 g of OP-10 in combination with 4.0 g of ABSK, 10.0 g of nefras A 150/330 and bring to a homogeneous state under the given reaction conditions. Further, as in example 1.

Example 10. The reaction flask was charged with: 70.0 g of low-volatile (C ₇ -C ₉ ) 2,4-dichlorophenoxyacetic acid esters (42 g in terms of 2,4-D), 7.8 g of dimethylalkyl-C ₁₂ -C ₁₄ - amine salt of 3,6-dichloro-0-anisic acid (4.0 g in terms of dicamba), 2.7 g of diethylamine salt of 3,6-dichloro-0-anisic acid (2.0 g in terms of dicamba). Then, 9 g of OP-10 and 4.0 g of ABSK are added to the reaction mixture when heated to 40-50 ° C, diluted in 6.5 g of nefras A 150/330 and brought to a homogeneous state with stirring. Further, as in example 1.

Example 11. Analogously to example 9.

The difference is that a similar amount of dicamba (6.0) is represented: 5.8 g of dimethylalkyl-C ₁₂ -C ₁₄ amine salt of dicamba (3.0 g in terms of dicamba), 5.3 g of triethanolamine salt of dicamba ( 3.0 g in terms of dicamba). The amount of nefras A150 / 330 is 9.9 g, OP-10 10.0%, ABSK 4.0%.

Example 12. Analogously to example 10. The difference is that a similar amount of dicamba (6.0) is represented by: 7.8 g of dimethylalkyl-C ₁₄ -C ₁₂ amine salt of dicamba (4.0 g in terms of dicamba), 2.6 g monoethanolamine salt of dicamba (2.0 g in terms of dicamba). The amount of nefras A150 / 330 is 5.6 g, the surfactant is 14.0 g (neonol AF 9-12).

Example 13. Analogously to example 9.

The difference is that a similar amount of dicamba (6.0) is represented by: 9.7 g of dimethylalkyl-C ₁₂ -C ₁₄ -amine salt of dicamba (5.0 g in terms of dicamba) and 1.0 g of dicamba in the form of free acid. The amount of nefras A150 / 330 is 11.0 g, OD 10 - 10.0 g, ABSK - 4.3 g.

Example 14. 75.0 g of 2,4-dichlorophenoxyacetic acid 2-ethylhexyl ester (48 g in terms of 2,4-D), 6.0 g of 3,6-dichloro-0-anisic acid (in in terms of 100% active substance), then 5.5 g of dimethylalkyl-C ₁₂ -C ₁₄ amine are gradually poured, stirred for 1 hour at 40-50 ° C, then 3.0 g of ethoxylated castor oil and 5.0 g of ABSK are added, 5 5 g of nefras A120 / 200 and adjusted to a homogeneous state (stirring for 1 hour). The ratio of 2,4-D and dicamba in the composition is 8: 1. Further, as in example 1.

Example 15. Analogously to example 14.

The difference is that the ratio of 2,4-D and dicamba in the composition is 7: 1, at concentrations of 46.6 and 6.6%, respectively.

Composition: 71.0 g - 2,4-D 2-ethylhexyl ether,

6.6 g - dicamba in terms of 100% AI,

6.1 g - dimethylalkyl-C ₁₂ -C ₁₄ -amine,

9.0 g - neonol AF 9-12 and 3.0 g ABSK,

solvent, up to 100 (about 4.3 g) - nefras A120 / 200.

Example 16. Analogously to example 14.

The difference is that the ratio of 2,4-D and dicamba in the composition is 4: 1, at concentrations of 32.0 and 8.0%, respectively.

Composition: 50.0 g - 2,4-D 2-ethylhexyl ether,

8.0 g - dicamba in terms of 100% AI,

7.4 g - dimethylalkyl-C ₁₂ -C ₁₄ -amine,

10.0 g - neonol AF 9-12 and 4.6 g ABSK,

solvent, up to 100 (about 20.0 g) - a mixture of nefras 120/200 and 150/330.

Example 17. Analogously to example 14.

The difference is that the ratio of 2,4-D and dicamba in the composition is 3: 1, at concentrations of 30.0 and 10.0%, respectively.

Composition: 47.0 g - 2,4-D 2-ethylhexyl ether,

10.0 g - dicamba in terms of 100% AI,

9.2 g - dimethylalkyl-C ₁₂ -C ₁₄ -amine,

10.0 g - neonol AF 9-12 and 4.0 g ABSK,

solvent, up to 100 (about 19.8 g) - a mixture of nefras 120/200 and 150/330.

Example 18. Analogously to example 14.

The difference is that the ratio of 2,4-D and dicamba in the composition is 1: 1, at concentrations of 20.0 and 20.0%, respectively.

Composition: 31.0 g - 2,4-D 2-ethylhexyl ether,

20.0 g - dicamba in terms of 100% AI,

18.0 g - dimethylalkyl-C ₁₂ -C ₁₄ -amine,

12.0 g - neonol AF 9-12 and 5.0 g ABSK,

solvent, up to 100 (about 14.0 g) - a mixture of nefras 120/200 and 150/330.

Example 19. To the reaction flask was charged 77.0 g of low-volatile (C ₇ -C ₉ ) 2,4-dichlorophenoxyacetic acid esters (48 g in terms of 2,4-D), 6.0 g of 3,6-dichloro-0 -anisic acid (in terms of 100% active substance), heated to 40-50 ° C, then 3.7 g of dimethylalkyl-C ₁₂ -C ₁₄ amine are gradually poured, stirred for 0.5 hours, 1.1 g of diethylethanolamine is added, mixed within 0.5 hours, then add 3.0 g of ethoxylated castor oil, 7.0 g of neonol AF 9-12, 2.2 g of nephras A 120/200 and bring to a homogeneous state (stirring for 1 hour). The ratio of 2,4-D and dicamba in the composition is 8: 1. Further, as in example 1.

Example 20. Analogously to example 19.

The difference is that the ratio of 2,4-D and dicamba in the composition is 1: 1, at concentrations of 20.0 and 20.0%, respectively.

Composition: 33.0 g of low-volatile (C ₇ -C ₉ ) 2,4-D esters,

20.0 g - dicamba in terms of 100% AI,

16.9 g-dimethylalkyl-C ₁₂ -C ₁₄ -amine,

1.1 g diethylethanolamine

20.0 g - neonol AF 9-12,

solvent, up to 100 (about 9.0 g) - nefras 120/200.

Example 21 (prototype, according to patent RU 2073974). Analogously to example 1. The difference is that the derivatives of 2,4-D and dicamba are presented as low-volatile (C ₇ -C ₉ ) esters of 2,4-D and synergist-N-cyclohexanone-0- (2-methoxy-3 , 6-dichlorobenzoyl) oxime of the following herbicidal composition:

55.0 g of low-volatile esters (C ₇ -C ₉ ) 2,4-D (35% in terms of 100% e.v.),

11.0 g of oxime of dicamba (5% in terms of 100% e.v.),

15.0 g OP-10 and 3.0 g ABSK,

solvent, up to 100 (about 16.0 g) nefras A 150/330.

Example 22 (beyond). Analogously to example 14.

The difference is that the ratio of 2,4-D and dicamba in the composition is 1: 2, at concentrations of 10.0 and 20.0%, respectively.

Composition: 15.7 g - 2,4-D 2-ethylhexyl ether,

20.0 g - dicamba in terms of 100% AI,

18.2 g - dimethylalkyl-C ₁₂ -C ₁₄ -amine,

15.0 g - neonol AF 9-12 and 4.0 g ABSK,

solvent, up to 100 (about 27.1 g) - nefras 150/330.

Example 23 (beyond). Analogously to example 1.

The difference is that the ratio of 2,4-D and dicamba in the composition is 10: 1, at concentrations of 40.0 and 4.0%, respectively.

Composition: 69.0 g - 2,4-D 2-ethylhexyl ether,

4.0 g - dicamba in terms of 100% AI,

3.7 g - dimethylalkyl-C ₁₂ -C ₁₄ -amine,

12.0 g - neonol AF 9-12 and 4.0 g ABSK,

solvent, up to 100 (about 7.3 g) - nefras 150/330.

Example 24 (beyond). Analogously to example 9.

The ratio of 2,4-D and dicamba in the composition is 7: 1. The difference is that a similar amount of dicamba is introduced into the composition only in the form of a salt with a secondary amine.

Composition: 69.0 g - 2,4-D 2-ethylhexyl ether,

7.0 g of dicamba diethylamine salt (6.0 g in terms of dicamba),

15.0 g of neonol AF 9-12, ABSK - 5.0 g,

4.0 g solvent - nefras A150 / 330.

The preparative form is stratified and does not comply with generally accepted standards for the operation of emulsion concentrates.

Example 25. Field tests are carried out on crops of spring barley. The main weeds of the crop were: annual dicotyledons (67 pcs / m ² ) - Schleicher’s smoky, medium starlet, cabbage (mainly yellow-leaved yellowness, mustard), cistalis picnicus, clinging bedstraw, odorless chamomile, field violet, calendula; perennial dicotyledonous (45 pcs / m ² ) - bristle butyx, field butyrus, field sow thistle, field bindweed, as well as field horsetail. Spraying the crops is carried out with an aqueous emulsion of preparations, in the phase of tillering of the crop, the herbicidal effect is taken into account - one month after the treatment to inhibit the fresh mass of weeds taken from 1 m ^{2 of the} plot in comparison with the control (without herbicides). The prototype is the composition described in patent RU 2073974. Crop accounting is carried out by continuous threshing of sheaves from an area of 10 m ^{2 of} each plot. Four repetition. The smallest significant difference (NDS 095) when accounting for the crop is 0.7 c / ha. The results of the experiments are shown in table 3.

Example 26. Field trials are carried out on crops of corn. Weed vegetation is mainly represented by perennial dicotyledonous weeds - bristle thistle (17 pcs / m ² ) and field sow thistle (14 pcs / m ² ), field bindweed and field thistle - 1-3 pcs / m ² . The prototype is the composition described in patent RU 2073974. Spraying of crops is carried out with an aqueous emulsion of preparations, in the phase of 3-5 leaves of the crop, the herbicidal effect is taken into account one month after treatment to inhibit the fresh weight of weeds taken from 1 m ^{2 of} plot in comparison with control (without herbicides). Accounting for the crop is carried out by continuous threshing of the cob from an area of 10 m ^{2 of} each plot. Four repetition. The smallest significant difference (NDS 095) when taking into account the crop is + 2.6 c / ha. The results of the experiments are shown in table 4.

The data presented in tables 3 and 4 indicate that the compositions based on 2-ethylhexyl or C ₇ -C ₉ -alkyl ester of 2,4-dichlorophenoxyacetic acid (1) and salts of 3,6-dichloro-0-anisic acid (11 ) with tertiary aliphatic amines with a mass ratio of I: II equal to 1: (0.125-1), have a synergistic effect in relation to dicotyledonous weeds, including species of thistle, sow thistle and other root shoot weeds. With exorbitant ratios, the synergistic effect is reduced. The proposed composition at comparable doses in terms of active ingredient exceeds the prototype in herbicidal activity, which contributes to higher yields of barley and maize compared to the control.

Table 1 The compositions of the preparations for the description of the inventions according to examples 1-8 and with transcendent compositions of the formulations 22, 23, 24 HERBICIDE COMPONENTS COMPOSITION OF THE RECIPE,% one 2 3 four 5 6 7 8 22 23 24 2,4-D (recalculation at 100% a.m.) 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 10.0 40.0 42.0 2,4-D 2-ethylhexyl ether 55.0 55.0 55.0 55.0 55.0 55.0 55.0 55.0 15.7 69.0 65.0 Dicamba (recalculated to 100% a.a.) 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 20.0 4.0 6.0 Triethanolamine Dicamba Salt 8.4 Dicamba dimethylethanolamine salt 7.2 Tripropylamine salt of dicamba 8.2 Dicamba dimethyl octylamine salt 8.5 Dicamba dimethyldecylamine salt 9.2 Dicamba dimethyl laurylamine salt 9,4 Dimethylalkyl-C ₁₂ -C ₁₄ -amine salt of dicamba 9.7 38.2 7.7 Dimethylalkyl-C ₁₂ -C ₁₈ -amine Dicamba salt 11.0 Dicamba diethylamine salt 7.0 NEONOL AF 9-12 5.0 15.0 8.0 8.0 8.0 15.0 12.0 15.0 OP-10 20.0 12.0 Sintanol DS-10 15.0 ABSK 0 4.0 5.0 2.0 4.0 4.0 4.0 4.0 4.0 4.0 5.0 Nefras A 150/330 8.8 11.0 13.4 12.4 27.1 7.3 4.0 Kerosene 12.0 12.0 12.0 Xylene 23.0 12.4 Cyclohexanone 4.5 5.3 Dimethylformamide 7.8 N-methylpyrrolidone 3.6 Alcohols 8.8 11.0 12.4 Concentrate Characterization HOMOGENEOUS - Stability of 1% aqueous emulsion STABLE -

table 2 The compositions of the examples 9-21 (prototype 21 composition) HERBICIDE COMPONENTS COMPOSITION OF THE RECIPE,% 9 10 eleven 12 13 fourteen fifteen 16 17 eighteen 19 twenty 21 2,4-D in terms of 100% 42 42 42 42 42 48 46 32 thirty twenty 48 twenty 35 2,4-D-ethylhexyl ether 65 65 65 75 71 fifty 47 31 C ₇ -C ₉ - 2,4-D ester 70 70 77 33 55 DICAMBA in terms of 100% 6.0 6.0 6.0 6.0 6.0 6.0 6.6 8.0 10 twenty 6.0 twenty 5.0 Oxime Dicamba eleven Dimethylalkyl (C ₁₂ -C ₁₄ ) amine 5.5 6.1 7.4 9.2 eighteen 3.7 16.9 Dicamba monoethanolamine salt 1.3 2.6 Dicamba diethylamine salt 2.7 Triethanolamine Dicamba Salt 5.3 Dicamba diethylethanolamine salt 3.1 3.1 Dimethylalkyl- (C ₁₂ -C ₁₄ ) amine-
dicamba salt 9.7 7.8 5.8 7.8 9.7 11.5 12.7 15.4 19.2 38.0 7.7 34.9 NEONOL AF 9-12 fourteen 9.0 10 10 12 7.0 twenty OP-10 10 9.0 10 10 fifteen Ethoxylated Castor Oil 3.0 3.0 ABSK 4.0 4.0 4.0 4.3 5.0 3.0 4.6 4.0 5.0 3.0 Nefras A 120/200 5.5 4.3 10 9.9 2.2 9.0 16 Nefras A 150/330 10 6.5 9.9 5.6 eleven 10 9.9 fourteen Concentrate Characterization HOMOGENEOUS Stability of 1% aqueous emulsion STABLE

The results of field experiments on spring barley Table 3 Example No. The ratio is
N-2,4-D: dicamba Dose g / ha DV Inhibition of wet weight,% Harvest of spring barley Dicotyledonous weeds. Total. Perennial dicotyledonous weeds. F R Synergism F R Syner
gizm c / ha + _- one 7: 1 236 + 34 78 53 +25 71 25 +46 25.0 +3.5 2 7: 1 236 + 34 79 53 +26 72 25 +47 24.9 +3.4 3 7: 1 236 + 34 85 53 +32 78 25 +53 25.7 +4.2 four 7: 1 236 + 34 84 53 +31 78 25 +53 25.5 +4.0 5 7: 1 236 + 34 75 53 +22 68 25 +43 24.5 +3.0 6 7: 1 236 + 34 84 51 +33 79 25 +54 25.2 +3.7 7 7: 1 236 + 34 75 51 +24 69 25 +44 24.4 +2.9 8 7: 1 236 + 34 76 51 +24 70 25 +45 24.5 +3.0 9 7: 1 236 + 34 80 53 +27 77 25 +52 25.8 +4.3 10 7: 1 236 + 34 83 53 +30 76 25 +51 25.5 +4.0 eleven 7: 1 236 + 34 86 53 +33 79 25 +54 25.9 +4.4 12 7: 1 236 + 34 84 53 +31 78 25 +53 26.0 +4.5 13 7: 1 236 + 34 82 53 +29 75 25 +50 25.3 +3.8 fourteen 8: 1 240 + 30 71 55 +16 63 thirty +33 23.5 +2.0 fifteen 7: 1 236 + 34 81 53 +38 74 25 +49 25.8 +4.3 16 4: 1 216 + 54 95 55 +40 92 33 +59 25.5 +4.0 17 3: 1 203 + 67 97 64 +33 95 41 +54 24.0 +2.5 eighteen 1: 1 135 + 135 99 87 +12 96 78 +18 22.5 +1.0 19 8: 1 240 + 30 71 55 +16 63 thirty +33 23.5 +2.0 twenty 1: 1 135 + 135 99 87 +12 96 78 +18 22.5 +1.0 21 7: 1 236 + 34 71 53 +18 54 25 +29 23.6 +2.1 22 1: 2 90 + 180 99 97 +2 97 94 +3 18.0 -3.5 23 10: 1 245 + 24.5 68 60 +8 47 36 +11 23.0 +1.5 Ether 2,4-D 90 10.0 0 21.8 0.3 135 15.0 0 22.0 +0.5 203 20.0 0 22.4 +0.9 216 25.0 5 22.6 +1.1 232 40.0 19 22.5 +1.0 236 45.0 25 22.3 +0.8 240 48.0 thirty 22.8 +1.3 245 55.0 36 22.8 +1.3 270 65.0 45 23.0 +1.5 Dicamba 25 12.0 0 22.0 0.5 thirty 13.0 0 21.5 0.0 34 15.0 0 22.1 0.6 38 25.0 16 22.4 +0.9 54 40.0 thirty 22.7 +1.2 67 55.0 41 23.8 +2.3 135 85.0 78 25.0 +3.5 180 97.0 94 23.0 +1.5 Control (no herbicides) 0 21.5 0.0 Note: F - actual, P - estimated (expected) effect NDS 095 0.7

Table 4
The results of field experiments on corn crops Example No. 2.4-D: dicamba ratio Dose g / ha DV Inhibition of wet weight,% Harvest Corn Grains Articulate bristly Sow Thistle F R Synergism F R Syner
gizm c / ha + _- 9 7: 1 350 + 50 95 73 +22 94 68 +26 95.7 +11.2 10 7: 1 350 + 50 94 73 +21 96 68 +28 94.8 +10.3 eleven 7: 1 350 + 50 96 73 +23 95 68 +27 95.2 +10.7 12 7: 1 350 + 50 94 73 +21 93 68 +25 95.9 +11.4 13 7: 1 350 + 50 93 73 +20 92 68 +24 94.6 +10.1 fourteen 8: 1 355 + 45 86 74 +12 85 67 +18 90.8 +6.3 fifteen 7: 1 350 + 50 94 73 +21 94 68 +16 93.9 +9.4 16 4: 1 320 + 80 97 84 +13 96 80 +16 96.9 +12.4 17 3: 1 300 + 100 one hundred 86 +14 one hundred 82 +18 97.5 +13.0 eighteen 1: 1 200 + 200 one hundred 89 +11 one hundred 87 +13 97.9 +13.4 19 8: 1 355 + 45 86 74 +12 85 67 +18 90.8 +6.3 twenty 1: 1 200 + 200 one hundred 89 +11 one hundred 87 +13 97.9 +13.4 21 7: 1 350 + 50 85 73 +12 81 68 +13 90.7 +6.2 22 1: 2 133 + 267 98 96 +2 one hundred 92 +8 95.7 +11.2 23 10: 1 364 + 36 79 75 +4 73 65 +8 89.2 +4.7 Ether 2,4-D 133 0 0 84.1 -0.4 200 twenty twenty 85.1 +0.6 300 55 fifty 87.3 +2.8 320 60 56 88.0 +3.5 350 64 60 89.5 +5.0 355 67 63 89.1 +4.6 364 75 65 88.9 +4.4 400 80 70 89.6 +5.1 Dicamba 36 0 0 85.7 +1.2 45 twenty fifteen 86.5 +2.0 fifty 25 twenty 87.7 +3.2 80 59 55 88.3 +3.8 one hundred 70 65 88.9 +4.4 200 86 84 91.1 +5.6 267 96 92 93.5 +9.0 Control (no herbicides) 0 84.5 NDS 095 2.6 Note: Ф - actual effect; P - calculated (expected) effect

Claims (3)

1. A herbicidal composition comprising a 2,4-dichlorophenoxyacetic acid ester, synergist, surfactant, a solvent, characterized in that, as a 2,4-dichlorophenoxyacetic acid ester, it contains a compound of the general formula I:

where R is an alcohol radical of isonormal structure - C ₈ -alkyl, C ₇ -C ₉ -alkyl, as a synergist contains the amine salt of 3,6-dichloro-0-anisic acid of the general formula II:

where R is a tertiary aliphatic amine
when the mass ratio of 2-ethylhexyl or non-volatile C ₇ -C ₉ esters of 2,4-dichlorophenoxyacetic acid to the tertiary aliphatic amine salt of 3,6-dichloro-0-anisic acid is (1-8): 1. 2. The herbicidal composition of claim 1, characterized in that the composition is presented in the form of an emulsion concentrate in the following mass content of components,%:
2-ethylhexyl or low volatile (C ₇ -C ₉ ) ether 2,4-dichlorophenoxyacetic acid 31-75 tertiary amine salt of 3,6-dichloro-0-anisic acid 7.2-38.0 surface-active substance 7-20 solvent the rest is up to 100 3. A method of controlling dicotyledonous weeds, characterized in that the weeds are treated with an effective amount of the herbicidal composition according to claims 1 and 2.