RU2288581C1 - Synergetic herbicide composition and weed plants controlling method - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: synergetic herbicide composition contains active substances such as chlorimuron-ethyl (I) and imazetapir (II) and salts thereof, used in the ratio of (I):(II)-10:1, and also contains fillers, diluents, surfactants and other functional additives needed for producing of preparation forms. Method for controlling of weed plants in sown farm crops involves using effective doses of preparations adapted for suppressing weed plants without affecting leguminous crops such as soya, feed beans, pea etc.

EFFECT: wider range of weed plant controlling means and processes.

5 cl, 2 dwg, 7 tbl, 13 ex

Description

The invention relates to plant protection products that can be used to control weeds in crops, and more particularly to a new synergistic herbicidal composition and a method for controlling weeds by treating crops with an effective amount of this composition.

Known herbicidal preparation from the group of sulfonylureas "Classic" (Trademark Firm "DuPont"), the active substance of which is chlorimuron-ethyl, a compound of formula I

2 - [[(4-Chloro-6-methoxypyrimidin-2-yl) aminocarbonyl] aminosulfonyl] benzoic acid ethyl ester and salts suitable for the treatment of crops.

Chlorimuron-ethyl is effective against many types of plants and can be used both for continuous and selective destruction of unwanted vegetation (US Patent No. 4547215, USSR patent No. 1215603).

Imidazolinone herbicides are widely known, including imazetapir (the active substance of the drug “Pivot” (Trademark of the American Cyanamide Company), a compound of formula II.

(R, S) -5-ethyl-2- (4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl) nicotinic acid and its salts suitable for use in agriculture (US Patent No. 4608079 No. 4798619, EP 0041623, USSR Patent No. 1780498).

In subsequent years, a significant number of mixed preparations appeared, containing either chlorimuron-ethyl or imazetapir in combination with other herbicides. For example, DuPont recommends two mixed preparations Canopy SP ^® (chlorimuron-ethyl + metribuzin) and Canopy XL ^® (chlorimuron-ethyl + sulfentrazone) for weed control in soybean. See Du Font Canopy ^® SP and Du Pont Canopy ^® XL Proprietary Materials, Du Pont agricultural products, 1988.

In European patents EP 0181830 and EP 0187221 described synergistic compositions containing chlorimuron-ethyl and structurally similar derivatives of terahydro-2H-isoindole-1,3-dione. EP 1470763 describes a herbicidal composition comprising chlorimuron-ethyl and its salts in combination with uracil derivatives.

In the patent of the Russian Federation No. 22566121, a synergistic combination of herbicides is described containing N- [N- (4,6-dimethoxypyrimidin-2-yl) -aminocarbonyl-2- (dimethylaminocarbonyl) -5- (formylamino) benzene sulfamide and imazetapyr. The ratio of components is from 1: 1 to 1: 3. The mixture is recommended for weed control in crops of those varieties of corn that are resistant to glufosinate or glyphosate, or those soy crops that are resistant to imidazolinones.

The disadvantages of this herbicidal combination are phytotoxicity to cultivated plants (soybean, corn), which must be overcome by adding antidotes, and low efficiency in relation to some cereal and perennial weeds.

The closest analogue of the invention is described in US patent No. 5478795 herbicide composition containing chlorimuron-ethyl and imazapyr (isopropyl-ammonium salt 2- (4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl) nicotinic acid) , the active substance of the Arsenal herbicide (Trademark of the American Cyanamide Company), recommended for the complete destruction of vegetation on non-agricultural land. For the selective destruction of weeds in crops of crops, the drug is not used. As follows from the indicators given in the description of the above patent, the combination of chlorimuron-ethyl and imazalir in soybean crops has herbicidal activity only against morning glory (Pitted Morningglory), and it is not effective against other weeds. At higher doses, this mixture cannot be used because of its high phytotoxicity towards cultivated plants, including soy.

The object of the present invention is a synergistic herbicidal composition containing chlorimuron-ethyl (I) and imazetapyr (II), as well as their salts, suitable for processing crops. In the context of this invention, the term "salts suitable for processing crops" includes salts of alkali and alkaline earth metals, ammonium, quaternary ammonium salts, alkyl diethanol, dialkyl ethanol and triethanolammonium salts. When these herbicides are used together, a synergistic effect is observed, that is, the combined action of I + II is more effective than the sum of the actions of individual herbicides. This allows to reduce consumption rates and reduce the environmental burden on cultivated crops and soil. A synergistic effect occurs when the ratio of I: II is equal to from 1:10 to 10: 1, preferably from 1: 4 to 4: 1.

The composition in accordance with the present invention suppresses or destroys, depending on the consumption rate and the degree of sensitivity of the plants, such weeds in crops of legumes (soybeans, fodder beans, peas, etc.), such as oatmeal, millet, chicken, acalifa southern, ragweed, chandra crested, squinted backed, foxtail, dewdrop, chaff, bramble, mint, curry, porcupine, amaranth, white gauze, bedstraw, yellow thistle, sow thistle pink, codweed, morning glory, potato mountaineer, mountaineer beetle, bumpweed highlander, furry sigisbekia, mustard, mustard, TKA, veronica, violet, cocklebur, field bindweed, thistle, sorrel, tarragon and others.

The application rate of the herbicidal composition in the processing of crops of the above legumes by the amount of active substances is from 20 to 90 g / ha.

The composition can be used to treat plants or their places of growth both in the form of so-called tank mixtures prepared immediately before use, and in the form of finished formulations, which is certainly more convenient and therefore preferable.

Suitable for this combination of herbicides are, for example, such formulations as soluble and wettable powders, emulsion concentrates, oil-in-water or water-in-oil emulsions, oil or water based dispersions, suspension emulsions, suspension concentrates, granules, including water-soluble and water-dispersible, aqueous and water-glycol solutions, water-soluble concentrates.

Wettable powders are uniformly dispersible in water preparations which, along with the active substances, contain a filler, usually an inert substance, a wetting agent, for example, ethoxylated or propoxyethylated alkyl phenols, polyoxyethylated aliphatic alcohols or amines, sulfates or phosphates of polyoxyethylated fatty alcohols, or alkanesulfonates such as salt lignosulfonates, condensed alkylnaphthalene sulfonates, 2,2-dinaphthylmethane-6,6-dis sodium lphonate, sodium dibutylnaphthalene sulfonate or also sodium oleyl methyl tauric acid, ethoxylated or propoxylated tristyrylphenol phosphates or sulfates, sulfosuccinate derivatives and alkyl succinates.

Emulsifiable concentrates are obtained by dissolving the active substances in an organic solvent, such as aliphatic alcohols, cyclic ketones, dimethylformamide, aromatic hydrocarbons, including high-boiling, aliphatic high-boiling hydrocarbons, isophorone, various oils, both mineral and vegetable, with the addition of emulsifiers. As emulsifiers, for example, anionic surfactants, such as alkyl (aryl) sulfonates, including calcium dodecylbenzenesulfonate and nonionic surfactants such as polyglycol fatty alcohol esters, polyglycol fatty acid esters, condensation products of ethylene and propylene oxides (block copolymers) can be used. ), alkyl polyesters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters or polyoxyethylene sorbitan acid esters.

Emulsions of the oil-in-water or water-in-oil type may contain the solvents listed above, water and, in addition to the emulsifiers listed above, also phosphates or sulfates of ethoxylated alkyl (di- or tri-styryl) phenols and ethoxylated alkyl (di- or three styryl) phenols. The composition of water emulsions of various types also includes a thickener, antifoam and antifreeze.

Granules can be obtained by applying the active substances to granular inert carriers with high sorption ability, sometimes with the addition of adhesive components such as polyvinyl alcohol, polyacrylates, mineral oils. Granules can be obtained from prepared mixtures of active substances with inert fillers, dispersants, wetting agents, antifoams and other auxiliary substances by various known granulation methods.

Suspension concentrates are obtained by grinding a mixture of active substances with auxiliary substances (dispersants, wetting agents, antifoaming agents, etc.) in bead mills until particle dispersion of less than 5 microns is achieved, followed by formulation by adding thickeners and viscosity stabilizers.

Another object of the invention is a method of controlling weeds in crops of cultivated plants, preferably legumes (soybeans, beans, peas), which consists in applying a synergistic herbicidal composition consisting of chlorimuron-ethyl and imazetapir and / or their salts in effective amounts on weeds to be suppressed or destroyed or their habitat.

If necessary, the patented herbicidal composition can be used together with other well-known herbicides, such as 2,4-D, 2M-4X, dicamba, triazine herbicides and others by the joint or sequential treatment of these clogged with unwanted plants crops of agricultural crops.

The following are examples of the preparation of various formulations and their characteristics, as well as biological examples for evaluating the herbicidal activity of a patentable synergistic herbicidal composition. The following examples illustrate but do not limit the present invention.

Preparative forms, preparation, compositions, physicochemical characteristics

Example 1

Obtaining sample 1 in the form of a wettable powder

5.8 g of tech. 95% chlorimuron-ethyl, 58.0 g tech. 95% imazetapyr, 3.0 g of ethoxylated nonylphenol, 2.0 g of calcium alkylnaphthalene sulfonate and 15.1 g of bentonite. The mixture is thoroughly mixed, then ground in a mill to a fineness of at least 85% of particles with a size of less than 10 microns.

Physico-chemical characteristics of the drug:

Appearance beige powder Chlorimuron Ethyl Content 5.5 wt.% Imazetapir Content 55.0 wt.% Moisture contents 0.5 wt.% Net balance 004 0.1 wt.% Stability 1% suspension 85%

Example 2

Obtaining sample 2 in the form of a water-glycol solution

20.0 g of water, 10.0 g of polyethylene glycol, 38.6 g of diethylethanolamine are charged into the reactor, and 12.6 g of tech. Are added gradually with stirring. 95% chlorimuron-ethyl and 50.5 g tech. 95% imazetapira. After dissolution is complete, 2.5 g of alkylnaphthalene sulfonate is added to the mass, the mass is stirred and filtered through a mesh.

Physico-chemical characteristics of a water-glycol solution:

Appearance yellow liquid Chlorimuron Ethyl Content 12.0 wt.% Imazetapir Content 48.0 wt.% Density 1210 kg / m ³ pH of 1% solution 7.8 The stability of a 1% solution at 0 ° C when holding for 2 hours there is no crystallization.

Example 3

Obtaining sample 3 in the form of water-dispersible granules

In a granulator with a mechanical fluidized bed load of 15.8 g of tech. 95% chlorimuron-ethyl, 47.3 g of tech. 95% imazetapyr, 8.0 g of polycarboxylate, 3.0 g of alkylnaphthalene sulfonate and 25.9 g of kaolin are thoroughly homogenized and granulated using water as a binder. Then the granulate is dried, the target fraction with a particle size of 0.1 to 1.4 mm is isolated by sieving and the physicochemical characteristics of the granules are determined.

Physico-chemical characteristics of water-dispersible granules

Appearance beige micro granular product Chlorimuron Ethyl Content 15.0 wt.% Imazetapir Content 45.0 wt.% Moisture contents 1.4 wt.%

Fractional-dispersed composition:

Particles in the size of 0.1-1.4 mm 98.5% Dynamic strength 98.0% Stability 1% suspension 82%

Example 4

Obtaining sample 4A in the form of water-soluble granules

In a granulator with a mechanical fluidized bed load of 42.0 g of tech. 95% chlorimuron-ethyl, 42.0 g tech. 95% imazetapyr, 13.0 g of lignosulfonates and 3.0 g of alkylnaphthalenesulfonate are thoroughly homogenized and granulated using reaction granulation. For this, an aqueous KOH solution is used as a binder with a total moisture content of granulate of 18%. Then the granulate is dried, the target fraction with a particle size of 0.1 to 1.4 mm is isolated by sieving and the physicochemical characteristics of the granules are determined.

Physico-chemical characteristics of water-soluble granules

Appearance beige micro granular product Chlorimuron Ethyl Content 40.0 wt.% Imazetapir Content 40.0 wt.% Moisture contents 1.2 wt.%

Fractional-dispersed composition:

Particles in the size of 0.1-1.4 mm 98% Dynamic strength 97.5% Dissolution time (1% solution) 28 s

Example 5

Obtaining sample 4 in the form of water-soluble granules

A mechanical fluidized bed granulator is charged with 31.6 tech. 95% chlorimuron-ethyl, 31.6 g of tech. 95% imazetapyr, 10.0 g of lignosulfonates and 26.8 sulfonol are thoroughly homogenized and granulated using reaction granulation. For this, an aqueous NaOH solution is used as a binder with a total granulate moisture of 18%. Then the granulate is dried, the target fraction with a particle size of 0.1 to 1.4 mm is isolated by sieving and the physicochemical characteristics of the granules are determined.

Physico-chemical characteristics of water-soluble granules

Appearance beige micro granular product Chlorimuron Ethyl Content 30.0 wt.% Imazetapir Content 30.0 wt.% Moisture contents 1.8 wt.%

Fractional-dispersed composition:

Particles in the size of 0.1-1.4 mm 99% Dynamic strength 98.8% Dissolution time (1% solution) 19 s

Example 6

Obtaining sample 5 in the form of a suspension concentrate

20.9 g of water, 6.0 g of polyglycol, 3.0 g of ethoxylated tristyryl-phenol phosphate, 2.0 g of ethoxylated tristyryl-phenol, 0.1 g of antifoam, 47.3 g of 95% chlorimuron-ethyl and 15, are placed in the reactor. 8 g tech. 95% imazetapira, thoroughly mixed until a homogeneous suspension is formed and milled in a Dyno-Mill bead mill. 5.0 g of an aqueous solution containing a thickening agent and a bactericide are added to the resulting product, and the physicochemical characteristics of the resulting suspension concentrate are determined.

Physico-chemical characteristics of suspension concentrate

Appearance white opaque liquid Chlorimuron Ethyl Content 45.0 wt.% Imazetapir Content 15.0 wt.%

Dispersion:

The proportion of particles with a size of less than 4 microns 90% Dynamic viscosity (Brookfield) 820 MPa · s Density, 20 ° С 1010 kg / m ³ Stability 1% suspension 98% pH of 1% suspension 6.1

Example 7

Preparation of sample 6 as a suspension concentrate. 26.3 g of soybean ethoxylated oil, 5.0 g of ethoxylated distyryl phenol sulfate, 3.0 g of alkyl polyester, 2.0 g of precipitated silica, 0.6 antifoam, 12.6 95% are placed in the reactor imazetapira and 50.5 g of chlorimuron-ethyl. The mixture is thoroughly mixed until a homogeneous suspension is formed and milled in a Dyno-Mill bead mill and the physicochemical characteristics of the resulting suspension concentrate are determined.

Physico-chemical characteristics of suspension concentrate

Appearance  white opaque liquid Chlorimuron Ethyl Content 48.0 wt.% Imazetapir Content 12.0 wt.%

Dispersion:

The proportion of particles with a size of less than 4 microns 97% Dynamic viscosity (Brookfield) 1540 mPa s Density, 20 ° С 1016 kg / m ³ Stability 1% suspension 98% pH of 1% suspension 7.2

Example 8

Obtaining sample 7 in the form of an emulsion concentrate

28.9 g of isophorone, 5.0 g of polyglycol ethers of fatty alcohols, 3.0 g of calcium dodecylphenyl sulfonate are loaded into the reactor, thoroughly mixed at a temperature of 40-45 ° C, and 58.0 g of tech. 95% chlorimuron-ethyl, 5.8 g tech. 95% imazetapira. The solution is stirred for 20-30 minutes, filtered through a filter and determine the physico-chemical characteristics of the drug.

Physico-chemical characteristics of the drug

Appearance yellow liquid Chlorimuron Ethyl Content 55.0 wt.% Imazetapir Content 5.5 wt.% Density 997 kg / m ³ pH 1% emulsion 6.7 Moisture contents 0.15 wt.%

Stability 1% emulsion - when holding for 2 hours there is no release of oil or cream.

Example 9

Assessment of the stability of various types of formulations during storage.

To assess the possibility of storing drugs for 2 years at a temperature of minus 10 to plus 35 ° C, the following tests were carried out:

1. Test for accelerated storage: the preparations were kept in a thermostat at plus 54 ° C for 2 weeks (CIPAC MT 46 technique);

2. Test for frost resistance: the preparations were kept in a thermostat at a temperature of minus 15 ° С for 10 days (GOST 9.707-81 and Surfactants and Specialites for Plant Protection, Rhodia);

3. Heat aging test: the preparations were kept in a thermostat at a temperature of plus 45 ° С for 60 days (GOST 9.707-81 and Surfactants and Specialites for Plant Protection, Rhodia);

Repeatability of tests is 3 times.

The viscosity of the preparations both before and after storage was determined on a Brookfield viscometer, stability was determined according to GOST 16484-79 and the CIPAC MT161 Method, dispersion was determined on a Fritsch-Analysette 22 laser particle analyzer. The results are presented in table 1.

As can be seen from table 1, all formulations are stable and can be stored for two years in unheated warehouses.

Biological tests

Example 10

The initial assessment of the herbicidal activity of mixtures of chlorimuron-ethyl and imazetapir with different ratios of components was carried out in an artificial climate laboratory under the following camera operating conditions: day duration - 16 hours, nights - 8 hours, illumination in the daytime - 15000 Lx, air temperature - 20 ° С , relative humidity - 75%, the duration of the experiment is 30 days. As a model of cereal weeds, test plants of spring wheat (Triticum aestivum) and sowing millet (Panicum mileaceum L.) were used. To treat the test plants with herbicides, we used an experimental sprayer that was set up as close as possible to the production mode according to the following indicators: rate of flow of the working fluid, the uniformity of its distribution on the treated area, and the degree of dispersion of the droplets.

Test plants were treated with a working fluid flow rate of 400 l / ha, average droplet size of 180 ± 20 μm (see "Chemistry in Agriculture", 1985, No. 7).

Two types of experiments were carried out. The first is the processing of test plants in the phase of 2 leaves, the second is the processing of test plants in the phase of 4 leaves, the repetition of experiments in each variant is 4-fold. Accounting was carried out 21 days after treatment in comparison with the untreated control.

In the first embodiment, equivalent doses were determined for various ratios of chlorimuron-ethyl and imazetapir from 1:10 to 10: 1, necessary for inhibiting the growth of 80% of test plants (ED ₈₀ ). The results are presented in the form of diagrams (figures 1 and 2). On the ordinate axis, doses of chlorimuron-ethyl are plotted, on the abscissa axis, doses of imazetapir. The obtained curves are located below the straight line connecting the doses of the individual components, which clearly indicates the presence of a synergistic effect (see Roberts HA, ed. - “Weed Control Handbook.Principes” 7 ^th ed., Blacwell Sci. PubL, 1982. p.232- 235 "The Evaluation of a new herbicide").

In the second variant, synergism was calculated according to Colby's formula (see S.R. Colby, Weeds. "Calculating Synergistic and Antagonistic response of herbicide combination", v.15, pp.20-22, 1967):

- % ингибирования компонентом А;Where

-% inhibition by component A;

β -% inhibition by component B;

E - expected (estimated) efficiency.

The results are presented in table 2.

Table 2.
Test results of herbicidal activity on test plants in a greenhouse No. p / p The ratio of chlorimuron-ethyl and imazetapira Consumption rate in g / ha Inhibition of growth of the test plant of wheat,% to control Synergism Inhibition of growth of test plants millet,% to control Synergism Chlorimuron ethyl Imazetapyr Fact. Calc. Fact. Calc. one 4: 1 10.0 2,5 49 34 +15 29th 7 +19.5 20,0 5,0 55 44 +11 71 44 +25.5 30,0 7.5 61 48 +13 83 49 +34 48.0 12.0 70 60 +10 88 60 +28 2 3: 1 7.5 2,5 45 28 +17 26 8.5 +17.5 15.0 5,0 55 41 +14 68 42 +26 30,0 10.0 61 44 +17 82 52 +30 45.0 15.0 69 53 +16 89 59 +30 3 1: 1 5,0 5,0 45 25 +20 66 17 +49 10.0 10.0 60 40 +20 68 45 +23 20,0 20,0 70 fifty +20 86 62 +24 30,0 30,0 79 60 +19 96 63 +33 four 1: 2 2,5 5,0 39 eleven +28 63 23.5 +39.5 7.5 15.0 64 37 +27 75 44 +31 15.0 30,0 85 60 +25 81 61 +20 20,0 40,0 94 66 +28 one hundred 67 +33 5 1: 3 2,5 7.5 56 26 +30 71 37.5 +33.5 5,0 15.0 64 31 +33 81 35 +46 10.0 30,0 75 44 +31 86 46 +40 15.0 45.0 95 68 +28 one hundred 70 +30 6 1: 4 2,5 10.0 58 29th +29 73 31 +42 5,0 20,0 65 32 +33 85 48 +37 10.0 40,0 86 61 +25 90 63 +27 12.0 48.0 97 67 +30 one hundred 71 +29 Imazetapyr 2,5 12 12 5,0 17 22 7.5 twenty 26 10.0 twenty thirty 12.0 21 31 15.0 23 32 20,0 25 46 30,0 43 47 40,0 48 53 45.0 55 60 60.0 78 85 Chlorimuron ethyl 2,5 8 2 5,0 10 5 7.5 eighteen 17 10.0 25 22 15.0 29th 26 20,0 33 29th 30,0 thirty 31 40,0 37 35 45.0 39 39 48 42 42

Example 11

Tests of the herbicidal activity of the combined preparations under field production conditions were carried out in soybean crops (Variety Primorskaya 69) in the fields of Primorsky Research Institute of Agriculture, Ussuriysky District. Primorsky Territory, from May 15 to September 08, 2004.

The size of the plots is 0.75 ha, the number of replications is 3 for each option. The phase of plant development at the time of processing is 2-3 real soybean leaves. Vegetative plants were sprayed using a POM-63 sprayer. The flow rate of the working fluid is 200 l / ha. Accounting for weeds was carried out before processing and before harvesting on September 8.

The reference used was Pivot (a trademark of the company American Cyanamide Company), a 10% water-soluble imazetapir concentrate. For comparison, we also tested the drug Classic (a trademark of DuPont), a 25% wettable powder of chlorimuron-ethyl. Harvesting was carried out by a combine.

The area where the herbicides were tested belongs to highly weedy, especially perennial weeds, such as wormwood, pink and yellow sow thistles, creeping wheatgrass, and annuals (akalifa southern, millet chicken, Siberian gingerbread, two-edged pikulnik, wormwood ragweed and others) .

All tested combinations have a wide spectrum of action on weeds and are not toxic to soy. The average results of the assessment of herbicidal effectiveness are presented in table 3, and technical efficiency (effect on yield) is presented in table 4.

Table 3
Biological effectiveness of samples on soybean crops (Accounting before harvesting) Sample No. The content of AI, wt.% Application rate, kg / ha Biological efficiency,% Imazetapyr Chlorimuron
ETHYL Dicotyledonous weeds Cereal Annuals Perennial Sample 1 55.0 5.5 0,045 82 76 92 0,060 87 82 98 Sample
2 48.0 12.0 0,045 96 92 88 0,060 99 96 91 Sample
3 45.0 15.0 0,045 99 98 75 0,060 one hundred one hundred 83 Sample 4 30,0 30,0 0,045 one hundred one hundred 68 0,060 one hundred one hundred 72 Sample 5 15.0 45.0 0,045 one hundred one hundred 65 0,060 one hundred one hundred 74 Sample 6 12.0 48.0 0,045 one hundred one hundred 60 0,060 one hundred one hundred 69 Sample
7 5.5 55.0 0,045 one hundred one hundred 39 0,060 one hundred one hundred 48 Pivot 10.0 - 0.08 68 twenty 56 Classic - 25.0 0.01 70 44 5

Table 4
The effect of herbicides on soybean productivity, 2004 Sample No. Productivity, t / ha Productivity, c / ha by biometrics Plant height, cm 1st bean attachment height The number of beans The number of grains one 9.6 10,4 87 23 22 36 2 10,4 10.1 104 26 25 44 3 20.5 19.5 95 24 24 46 four 20.1 19.8 85 23 24 46 5 20,4 19,4 96 23 27 fifty 6 20.8 19.3 91 25 29th 51 7 16.5 15.9 99 28 23 41 Pivot, 0.8 16,0 15.0 85 25 22 39 The control 5.9 6.4 98 23 23 26

Table 5
The sensitivity of various types of weeds to herbicides (accounting before harvesting) Experience option Reduction of weediness,% of control Leaf Ambrosia Sow thistle yellow Sigizbekia furry Mary White Shandra comb Qty Weight Qty Weight Qty Weight Qty Weight Qty Weight The control 43 * 564.6 * 5 165.7 7 24.5 29th 4.4 70 91.7 Sample 3.24 g / ha 98 98 70 71 71 73 86 85 one hundred one hundred Sample 3.30 g / ha 99 99 one hundred 94 one hundred 94 89 83 one hundred one hundred Sample 3.40 g / ha 99 99 one hundred one hundred one hundred one hundred 99 90 one hundred one hundred Pivot, 80 g / ha 81 81 80 62 fourteen +31 93 fifty 76 77 * In the control - the number of weeds pcs / m ² and their wet weight, g / m ² .

Example 12

The study of the herbicidal activity of the preparations on the crops of fodder beans was carried out using 60% water-dispersible granules (sample 3) as an example in field experiments on the fields of the Far Eastern Research Institute for Plant Protection. Primorsky Territory, Khankaisk District.

Cultural variety - Pikulovsky;

The phase of plant development at the time of processing is the first triple leaf;

The size of the plots is 27 m ² (4.5 × 6 m), the number of replicates is 4. Plants were sprayed using a hand-held sprayer, the flow rate of the working fluid was 670 l / ha. Weed counts were carried out before harvesting with herbicides and before harvesting. Harvested by hand by mowing plants from the entire area of the plot.

Crops of fodder beans are heavily littered, the total number of weeds reached 379-544 pcs./m ² . At the same time, annual dicotyledonous weeds prevailed - 55-64%, cereal annuals accounted for 31-44%. Of the dicotyledonous annuals, the most common were southern akalifa, ragweed, white ragweed and chandra crest. Perennial dicotyledonous weeds accounted for 4-7% of the total number of weeds and were represented by horsetail, sow thistle, yellow and pink; common wormwood, curly sorrel, field mint, and Chinese cleaner also met. The test results are presented in table 6.

Table 6
The effect of herbicides on weeds and forage bean yields (Accounting before harvesting) Experience option The death of weeds,% Including Productivity, t / ha Yield increase, c / ha annual Perennial dicotyledons Qty Weight dicotyledonous cereal Qty weight Qty Weight Qty Weight The control 322 * 1345 * 176 712 136 436 8 197 236 - Manual control weeding one hundred one hundred one hundred one hundred one hundred one hundred one hundred one hundred 420 184 Sample 3.24 g / ha 65 63 75 74 58 48 65 69 381 145 Sample 3.30 g / ha 84 81 88 88 85 75 85 95 406 170 Sample 3.40 g / ha D.V. 99 96 99 98 95 95 93 95 465 229 Pivot, 80 g / ha 70 80 53 74 93 95 62 66 380 144 NDS ₀₅ 2.7 * In the control - the number of weeds pcs / m ² and their wet weight, g / m ² .

Example 13

The study of the herbicidal activity of the preparations in the crops of vegetable peas, the grade Malyshok was carried out in the field at the sites of the VIIBZR of the Krasnodar Territory. The size of the plots is 25 m ² , the number of replicates is 4.

Spraying of vegetative plants was carried out using a manual pneumatic sprayer, the flow rate of the working fluid is 300 l / ha.

Tested the preparations in the form of water-soluble granules (VRH) - sample 4 and in the form of a water-suspension concentrate - sample 5, in various doses.

Accounting for weeds was carried out before processing and before harvesting.

The test results are presented in table 7.

Table 7.
The effect of herbicides on the prevailing weed species in pea crops (accounting - before harvesting) Variant of experience, dose according to AI Reduction of weediness,% of control Leaf Ambrosia Sow thistle yellow Pink sow thistle Common wormwood Shiritsa thrown back Qty Weight Qty Weight Qty Weight Qty Weight Qty Weight The control 106 1143 6 104.6 6 77 7 58.1 4.2 1.65 Sample 4.24 g / ha 89 94 75 78 fifty 73 75 78 one hundred one hundred Sample, 4.30 g / ha 94 98 85 90 90 95 94 96 one hundred one hundred Sample 5.18 g / ha 95 98 80 88 fifty 55 78 85 one hundred one hundred Sample 5.30 g / ha 96 99 one hundred one hundred 80 85 92 93 one hundred one hundred Pivot, 80 g / ha 38 46 64 68 27 84 78 82 76 67 Classic 10 g / ha 80 85 84 86 fifty 55 33 74 86 88

Claims (5)

1. A synergistic herbicidal composition containing, as an active principle, a combination of ethyl 2 - [[(4-chloro-6-methoxypyrimidin-2-yl) aminocarbonyl] aminosulfonyl] benzoic acid and / or its salts (chlorimuron ethyl) (I) and an imidazolinone herbicide, wherein the imidazolinone herbicide is (R, S) -5-ethyl-2- (4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl) nicotinic acid and / or its salt (imazetalir) (II), and the number of components can vary from the ratio (I) :( II), equal to 1:10 to 10: 1. 2. The synergistic herbicidal composition according to claim 1, characterized in that it further comprises fillers, diluents, surfactants and other target additives and excipients necessary for the preparation of preparative forms. 3. The synergistic herbicidal composition according to claim 1 or 2, characterized in that it can be obtained and presented in the form of a preparative form selected from their group: wettable powders, emulsion concentrates, granules, including water-soluble and water-dispersible granules, suspension concentrates, including water-suspension concentrates, aqueous and water-glycol solutions, water-soluble concentrates. 4. A method for controlling weeds in crops of crops by treating them with herbicides based on a mixture of chlorimuron-ethyl and imidazolinone herbicide, characterized in that effective amounts of a synergistic composition based on a mixture of chlorimuron-ethyl and are applied to the weeds to be destroyed. imazetapira according to claims 1, 2 and / or 3 at consumption rates from 20 to 90 g / ha in the amount of active substances. 5. The method of controlling weeds in crops of crops according to claim 4, characterized in that the processing is subjected to crops of legumes, including soybeans, fodder beans, peas.

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