Herbicidal composition and use thereof

Abstract

Disclosed herein is a herbicidal composition, comprising an active component A and an active component B, wherein the active component B is one selected from the group consisting of glufosinate-ammonium, glufosinate-P-ammonium, oxyfluorfen, acetoflufen, imazethapyr, dimethoxamide, dimethoxamid-P, metolachlor, S-metolachlor, butachlor, acetochlor, pyroxasulfone, glyphosate and derivatives thereof.

Claims

1. A herbicidal composition for controlling annual and perennial weeds in a garden field and a non-cultivated field, wherein the herbicidal composition comprises an active component A and an active component B; wherein the active component A has a structure as follows: ##STR00004## the active component B is one selected from a group consisting of glufosinate-ammonium, Oxyfluorfen, glufosinate-P-ammonium and derivatives thereof, and a mass ratio of the active component A to the active component B is 1: (1.5˜2), when the active component B is glufosinate-ammonium or glufosinate-P-ammonium or Oxyfluorfen, the herbicidal composition is used for controlling Xanthium, and when the active component B is Oxyfluorfen, the herbicidal composition is used for controlling Amaranthusretroflexus; wherein the composition excludes glyphosate isopropylamine.

2. A herbicide, comprising the herbicidal composition according to claim 1.

3. The herbicide according to claim 2, wherein a dosage form of the herbicide is water dispersible granules; in addition to the active component A and the active component B, a raw material for preparing the water dispersible granules further comprises a surfactant, a dispersant, an antagonist, a defoamer, a disintegrant, a binder and a solid carrier.

Description

DETAILED DESCRIPTION

(1) The present application will be further described below in conjunction with specific examples, but the present application is not limited to these specific embodiments. Those skilled in the art should recognize that the present application covers all alternatives, improvements, and equivalents that may be included within the scope of the claims.

(2) The object of the present application: to provide a herbicidal composition with significant synergy, low toxicity and low cost.

(3) In a first aspect of present application provided is a herbicidal composition comprising an active component A and an active component B;

(4) wherein the structure of the active component A is as follows:

(5) ##STR00002##

(6) The active component B is selected from one of glufosinate-ammonium, glufosinate-P-ammonium, oxyfluorfen, acetoflufen, imazethapyr, dimethoxamid-P, dimethoxamide, S-metolachlor, butachlor and acetochlor, or glyphosate and derivatives thereof.

(7) In the present application, the glyphosate and derivatives thereof are glyphosate or agrochemically suitable salts and esters thereof.

(8) As an embodiment of the present application, the mass ratio of the active component A and the active component B is 1:(1.5˜10).

(9) As an embodiment of the present application, the mass ratio of the active component A and the active component B is 1:(2˜6).

(10) As a preferred embodiment of the present application, the mass ratio of the active component A and the active component B is 1:(2˜3).

(11) In a second aspect of the present application, provided is a herbicide comprising the above herbicidal composition.

(12) The dosage form of the herbicide is emulsifiable concentrates, aqueous emulsions, microemulsions, suspoemulsions, wettable powders or water dispersible granules;

(13) Emulsifiable Concentrate

(14) In addition to the active component A and the active component B, the emulsifiable concentrate further comprises an organic solvent, a solvent oil and an emulsifier monomer.

(15) In the present application, the organic solvent in the emulsifiable concentrate is selected from: toluene, xylene, chlorobenzene, α-methylnaphthalene, turpentine, dichloromethane, chloroform, methanol, ethanol, isopropanol, butanol, isoamyl alcohol, cyclohexanone, isophorone, acetophenone, ethyl acetate, butyl acetate, N,N-dimethylformamide, dimethyl sulfoxide, methyl cellosolve, ethyl cellosolve, etc.

(16) As a preferred embodiment of the present application, the organic solvent in the emulsifiable concentrate is cyclohexanone.

(17) In the present application, the solvent oil in the emulsifiable concentrate is 150 #solvent oil.

(18) In the present application, the emulsifier monomer in the emulsifiable concentrate is calcium dodecylbenzenesulfonate (emulsifier 500 #).

(19) Aqueous Emulsion

(20) In addition to the active component A and the active component B, a raw material for preparing the aqueous emulsion further includes defoamers, water, antifreeze, emulsifiers and solvent oil;

(21) In the present application, the defoamer is selected from GPE, silicone defoamers, C8˜10 fatty alcohols, C10˜20 saturated fatty acids, amide and other defoamers.

(22) In the present application, the defoamer of the aqueous emulsion is a GPE polyether defoamer, that is, GPE, and its active ingredient is polyoxypropylenepolyoxyethylene regular glycol ether; the hydroxyl value is 45-56 mgKOH/g; the acid value is ≤0.5 mgKOH/g; and the molecular weight is 3000˜3800. Commodity brand is Changfeng.

(23) In the present application, the antifreeze is selected from one or more of sorbitol, ethylene glycol, glycerin, isopropanol and butanol.

(24) As a preferred embodiment of the present application, the antifreeze is selected from sorbitol and/or ethylene glycol.

(25) As a preferred embodiment of the present application, the antifreeze in the aqueous emulsion is sorbitol.

(26) In the present application, the emulsifier is selected from one of octylphenylpolyoxyethylene ether (CAS number: 9002-93-1), dibenzyl biphenyl polyoxyethylene ether (emulsifier 300 #), calcium dodecylbenzenesulfonate (emulsifier 500 #), tristyrylphenolpolyoxyethylene ether (emulsifier 600 #), and alkylphenol formaldehyde resin polyoxyethylene ether (emulsifier 700 #).

(27) As a preferred embodiment of the present application, the emulsifier in the aqueous emulsion is emulsifier 300 #.

(28) Microemulsion

(29) In addition to the active component A and the active component B, a raw material for preparing the microemulsions further include surfactants, co-surfactants, organic solvents, and water;

(30) In the present application, the surfactant in the microemulsion is selected from one of octylphenylpolyoxyethylene ether (CAS number: 9002-93-1), dibenzyl biphenyl polyoxyethylene ether (emulsifier 300 #), calcium dodecylbenzenesulfonate (emulsifier 500 #), tristyrylphenolpolyoxyethylene ether (emulsifier 600 #), and alkylphenol formaldehyde resin polyoxyethylene ether (emulsifier 700 #).

(31) In the present application, the surfactant in the microemulsion is emulsifier 500 #; and the co-surfactant is 2-methyl-2-propanol.

(32) Suspension Emulsion

(33) In addition to the active component A and the active component B, a raw material for preparing the suspension emulsion further includes cyclohexanone, SE3700A, SE3700B, ethylene glycol, xanthan gum, sodium benzoate, a defoamer, and water.

(34) The SE3700A is a brand of polyether emulsifier, Huntsman SE3700A.

(35) The SE3700B is a brand of a mixture of anionic and nonionic surfactants, AkzoNobel SE3700B.

(36) Wettable Powder

(37) In addition to the active component A and the active component B, a raw material for preparing the wettable powder further comprises a dispersant, a wetting agent and a defoamer.

(38) The dispersant is selected from one or more of naphthalene or alkylnaphthalene formaldehyde condensate sulfonate, fatty alcohol ethylene oxide adduct sulfonate, alkylphenolpolyoxyethylene ether sulfonate, polycarboxylate, fatty alcohol ethylene oxide adduct phosphate, alkylphenolpolyoxyethylene ether formaldehyde condensate sulfate, polyoxyethylenepolyoxypropylene ether block copolymer, alkylphenolpolyoxyethylene ether phosphate, lignosulfonate, gelatin, gum arabic, carboxymethyl cellulose, polyoxyethylene alcohol, polyvinylpyrrolidone, sodium polyacrylate, and polyethylene glycol.

(39) As a preferred embodiment of the present application, the dispersant of the wettable powder is calcium lignosulfonate.

(40) The wetting agent is selected from one of fatty alcohol sulfate, alkyl alcohol polyoxyethylene ether sodium sulfate, alkylphenolpolyoxyethylene ether sodium sulfate, alkylphenolpolyoxyethylene ether formaldehyde condensate sulfate, sodium alkyl sulfate, alkylnaphthalene sulfonate, fatty alcohol ethylene oxide adduct sulfonate, alkylphenol formaldehyde condensate ethylene oxide adduct sulfonate, alkylamide sulfonate, fatty alcohol polyoxyethylene ether, alkylphenolpolyoxyethylene ether, trihydrate alcohol fatty acid ester, trihydrate alcohol fatty acid ester polyoxyethylene agent ether, polyoxyethylenepolyoxypropylene ether block copolymer, alkylphenol formaldehyde condensate polyoxyethylene ether.

(41) As an embodiment of the present application, the wetting agent of the wettable powder is fatty alcohol polyoxyethylene ether, specifically AEO9.

(42) In the present application, the filler of the wettable powder is attapulgite.

(43) Water Dispersible Granule

(44) In addition to the active component A and the active component B, a raw material for preparing the water dispersible granules further includes a surfactant, a dispersant, an antagonist, a defoamer, a disintegrant, a binder, and a solid carrier;

(45) The surfactant of the water dispersible granule is sodium dodecyl sulfate.

(46) The dispersant of the water-dispersible granule is naphthalene sulfonate formaldehyde condensate.

(47) The antagonist of the water dispersible granule is ammonium sulfate.

(48) The defoamer of the water dispersible granule is BASF ST2292 defoamer.

(49) The solid carrier of the water dispersible granule is kaolin.

(50) In a third aspect of present application, provided is an application of the herbicidal composition for controlling annual and perennial weeds in a garden field and a non-cultivated field.

(51) when the herbicidal composition is used to control green bristlegrass, an amount of the active component A is 7.5˜15 ga.i./hm.sup.2, and the amount of the active component B is 75˜180 ga.i./hm.sup.2;

(52) when the herbicidal composition is used to control weed lambsquarters, and the active component B is dimethoxamide or dimethoxamid-P, the amount of the active component A is 7.5˜15 ga.i./hm.sup.2, and the amount of the active component B is 75˜180 ga.i./hm.sup.2;

(53) when the herbicidal composition is used to control weed lambsquarters, and the active component B is metolachlor or S-metolachlor, the amount of the active component A is 15˜22.5 ga.i./hm.sup.2, and the amount of the active component B is 90˜135 ga.i./hm.sup.2;

(54) when the herbicidal composition is used to control weed abutilon, and the active component B is imazethapyr, pyroxasulfone, imazethapyr, glufosinate-ammonium or glufosinate-P-ammonium, the amount of the active component A is 7.5˜30 ga.i./hm.sup.2, and the amount of the active component B is 15˜180 ga.i./hm.sup.2;

(55) when the herbicidal composition is used to control weed abutilon, and the active component B is imazethapyr or pyroxasulfone, the amount of the active component A is 7.5˜15 ga.i./hm.sup.2, and the amount of the active component B is 22.5˜90 ga.i./hm.sup.2.

(56) The content of the present application will be further described in detail in conjunction with the following examples. The content mentioned in the examples is not a limitation of the present application. The choice of material formula can be tailored to local conditions and has no substantial effect on the results. In these examples, all percentages are by weight unless otherwise stated.

DOSAGE FORM PREPARATION EXAMPLES

Example 1: Water Dispersible Granule Comprising 60% of Active Component A and Glufosinate-Ammonium (Glufosinate-P-Ammonium)

(57) TABLE-US-00001 active component A  20% Glufosinate-ammonium (glufosinate-P-ammonium)  40% Sodium dodecyl sulfate   4% Naphthalene sulfonate formaldehyde condensate   6% Ammonium sulfate   5% BASF ST2292 defoamer 0.1% Kaolin was used to complement.

(58) The preparation method was as follows: the above materials were added together in a conical mixer to mix evenly, and then crushed by an airflow crusher. The crushed materials were mixed by a conical mixer. 98% of the mixed materials were passed through a 600 mesh standard sieve, and added to a kneader to form plastic materials. The materials were finally put into an extrusion granulator to extrude and granulate. After granulation, the materials were dried and sieved to obtain a water dispersible granule comprising 60% active component A and (glufosinate-P-ammonium) glufosinate-ammonium.

Example 2: Microemulsion Comprising 22% of Active Component A and Dimethoxamide (Dimethoxamid-P)

(59) TABLE-US-00002 active component A  2% Dimethoxamide (dimethoxamid-P) 20% Cyclohexanone 10% 2-methyl-2-propanol 10% Emulsifier 500# 20% Water was used to complement to 100%

(60) The preparation method was as follows: after fully dissolving the active ingredients active component A and (dimethoate-P) dimethoate with a solvent, emulsifier 500 # and 2-methyl-2-propanol were added to mix well, and finally tap water was added. The mixture was thoroughly stirred to obtain a microemulsion comprising 22% of active component A and dimethoate (dimethoate-P).

Example 3: Aqueous Emulsion Comprising 35% of Active Ingredient A and Metolachlor (S-Metolachlor)

(61) TABLE-US-00003 active component A   5% Metolachlor (S-metolachlor)  30% 150# solvent oil  10% EO-PO block polyether   3% Ethylene glycol   3% GPE polyether defoamer 0.2% Deionized water was used to complement to 100%

(62) The preparation method was as follows: after dissolving the active ingredients active component A and metolachlor (S-metolachlor) with a solvent, an emulsifier was added to mix and stir well to form a homogeneous liquid, as an oil phase component; antifreeze glycol, GPE polyether defoamer, and deionized water were mixed and stirred well as a water phase. Using a high-speed shearing machine, the oil phase was drawn into the water phase and fully sheared to obtain an aqueous emulsion comprising 35% of active ingredient A and metolachlor (S-metolachlor).

Example 4: Emulsifiable Concentrate Comprising 25% of Active Component A and Oxyfluorfen

(63) TABLE-US-00004 active component A 10% Oxyfluorfen 15% Cyclohexanone 10%, 500#  2%, 1602  4% 150# solvent oil was used to complement to 100%.

(64) The preparation method was as follows: the active ingredients active component A and oxyfluorfen, cyclohexanone, emulsifier monomer 500 #, emulsifier monomer 1602, 150 # solvent oil were sequentially put into a stirring kettle, and fully heated and stirred to obtain an emulsifiable concentrate product comprising 25% of active component A and oxyfluorfen.

Example 5: Wettable Powder Comprising 34% of Active Component A and Imazethapyr

(65) TABLE-US-00005 active component A 8.9%, Imazethapyr 25.1%, Fatty alcohol polyoxyethylene ether 6%, Calcium lignosulfonate 4%, Filling attapulgite was used to complement to 100%.

(66) The preparation method was as follows: the active ingredients and each auxiliary were mixed well, put into a mechanical pulverizer for coarse pulverization, then pulverized by air flow, and then mixed well to obtain a wettable powder comprising 34% of active component A and imazethapyr.

Example 6: Suspoemulsion Comprising 35% of Active Component A and Pyroxasulfone

(67) TABLE-US-00006 active component A    5% Pyroxasulfone   30% Cyclohexanone   10% SE3700A    6% SE3700B    9% Ethylene glycol    3% Xanthan gum 0.12% Sodium benzoate  0.2% BASF 8034A defoamer  0.2% Deionized water was used to complement to 100%.

(68) The preparation method was as follows: each component was weighed according to the formula. Pyroxasulfone crude drug, dispersants, wetting agents and other auxiliaries, and a part of water were coarsely sheared, and directly sanded in a sanding mill to obtain a suspending agent; active component A, cosolvent cyclohexanone, emulsifiers and other auxiliaries, and part of water were put into a high-shear emulsification kettle and sheared at high speed to obtain an aqueous emulsion; the suspending agent and the aqueous emulsion were added according to a certain ratio and added with auxiliaries to mix well to obtain a finished suspoemulsion product.

Example 7: Aqueous Suspension Comprising 50% of Active Component A and Glyphosate

(69) active component A: 30%

(70) Glyphosate isopropylamine (by acid): 20%

(71) Dispersant: 5%

(72) Wetting agent: 2%

(73) Sorbitol: 3%

(74) Thickener: 0.15%

(75) Defoamer: 0.2%

(76) The remaining amount was made up with water.

Example 8: Water Dispersible Granule Comprising 60% of Active Component A and Glyphosate

(77) Component A: 20%

(78) Glyphosate isopropylamine (by acid): 40%

(79) Dispersant (sodium lignosulfonate): 4%

(80) Wetting agent (fatty alcohol polyoxyethylene ether): 50.1%˜8%

(81) Disintegrant (calcium chloride): 3%

(82) BASF ST2292 defoamer: 0.1%

(83) Binder (magnesium aluminum silicate): 6%

(84) The remaining amount was made up with kaolin.

Example 9: Wettable Powder Comprising 37% of Active Component A and Glyphosate

(85) active component A: 9.1%

(86) Glyphosate isopropylamine (by acid): 27.9%

(87) Sodium ether sulfate: 2.1%

(88) Sodium alkanoamide sulfonate: 3.6%

(89) The remaining amount was made up with attapulgite.

Examples of Indoor Biological Activity Determination

(90) In the present application, indoor combined action of the compound of herbicide active component A and B on weeds was measured to determine the combined effect of the composition on weeds, wherein the structure of the active component A was as follows:

(91) ##STR00003##
was one of glufosinate-ammonium, glufosinate-P-ammonium, dimethoxamide, dimethoxamid-P, metolachlor, S-metolachlor, butachlor, acetochlor, oxyfluorfen, acetofluran, imazethapyr, and pyroxasulfone.

(92) The weed cultivation method was as follows: quantitative weed seeds abutilon and bristlegrass were respectively sown in a paper cup filled with nutrient soil with a diameter of 7 cm, and then cultivated in the greenhouse after covering the soil, suppressing and watering. The post-emergence stem and leaf treatment was performed when the grass weeds grew to 5-7 leaf stage, broad-leaved weeds grew to 6-8 leaf stage; the pre-emergence soil treatment was performed the second day after sowing, and the early post-emergence treatment was performed after sowing and before emergence; the experiment was repeated 3 times. After the treatment and drug solution naturally dried, the weeds were placed in the greenhouse to be managed according to conventional methods. According to the suppression or death of the weeds, a visual control effect investigation was conducted 30 days after the treatment. The application adopted the Gowing method to evaluate the combined effect of the proposed composition.

(93) $\mathrm{theoretical}\mathrm{value}{E}_0=X+Y-\frac{XY}{100}$

(94) In the formula:

(95) X—Weed control effect when the amount of herbicide component A is P;

(96) Y—Weed control effect when the amount of herbicide component B is Q;

(97) E.sub.0—Theoretical control effect when the amount of herbicide component A is P+theoretical control effect when the amount of herbicide component B is Q;

(98) E—The measured control effect after the herbicide component A and the herbicide component B are mixed according to the above ratio.

(99) When E−E.sub.0>10%, it is synergism; when E−E.sub.0<−10%, it is antagonism; when E−E.sub.0 value is between ±10%, it is addition.

Example 10

(100) TABLE-US-00007 TABLE 1 Combined effect of the mixed use of active component A and dimethoxamide (dimethoxamid-P) on weeds (pre-emergence) Bristlegrass Lambsquarters Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E.sub.0 E − E.sub.0 value E value E.sub.0 E − E.sub.0 active component A 7.5 0 — — 5 — — 15 15 — — 20 — — Dimethoxamide 75 25 — — 20 — — 150 40 — — 35 — — Dimethoxamid-P 75 30 — — 35 — — 150 55 — — 50 — — active component A + 7.5 + 75   45 25.0 20.0 35 24.0 11.0 dimethoxamide 15 + 150 65 49.0 16.0 75 48.0 27.0 active component A + 7.5 + 75   55 30.0 25.0 55 38.3 16.7 dimethoxamid-P 15 + 150 80 61.8 18.2 85 60.0 25.0

(101) TABLE-US-00008 TABLE 2 Combined effect of the mixed use of active component A and metolachlor (S-metolachlor) on weeds (pre-emergence) Bristlegrass Lambsquarters Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E.sub.0 E − E.sub.0 value E value E.sub.0 E − E.sub.0 active component A 15 10 — — 15 — — 22.5 25 — — 25 — — metolachlor 90 40 — — 50 — — 135 60 — — 55 — — S-metolachlor 90 35 — — 45 — — 135 60 — — 65 — — active component A + 15 + 90 60 47.5 12.5 80 57.5 22.5 metolachlor 22.5 + 135  95 70.0 25.0 90 66.3 23.7 active component A + 15 + 90 70 41.5 28.5 80 53.3 26.7 S-metolachlor 22.5 + 135  95 70.0 25.0 95 73.7 21.3

(102) TABLE-US-00009 TABLE 3 Combined effect of the mixed use of active component A and butachlor\acetochlor on weeds (pre-emergence) Bristlegrass Eclipta alba Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E.sub.0 E − E.sub.0 value E value E.sub.0 E − E.sub.0 active 7.5 0 — — 0 — — component A 15 10 — — 10 — — Butachlor 75 45 — — 15 — — 150 60 — — 25 — — Acetochlor 75 50 — — 10 — — 150 75 — — 35 — — active component A + 7.5 + 75   60 45.0 15.0 30 15.0 15.0 butachlor 15 + 150 85 64.0 21.0 55 32.5 22.5 active component A + 7.5 + 75   70 50.0 20.0 25 10.0 15.0 acetochlor 15 + 150 90 77.5 12.5 60 41.5 18.5

(103) The test results (Table 1 to Table 3) indicated that under greenhouse conditions, the mixed use of the active component A and the amide herbicides dimethoxamide, dimethoxamid-P, metolachlor, S-metolachlor, butachlor, acetochlor for pre-emergence soil treatment had obvious synergism.

Example 11

(104) TABLE-US-00010 TABLE 4 Combined effect of the mixed use of active component A and imazethapyr\pyroxasulfone on weeds (pre-emergence) Bristlegrass Abutilon Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E.sub.0 E − E.sub.0 value E value E.sub.0 E − E.sub.0 active component A 15 10 — — 5 — — 30 15 — — 20 — — Imazethapyr 45 30 — — 5 — — 90 45 — — 25 — — Pyroxasulfone 90 60 — — 40 — — 180  75 — — 55 — — active component A + 15 + 45 55 38.5 16.5 30  9.8 20.2 Imazethapyr 30 + 90 75 53.3 21.7 60 40.0 20.0 active component A + 15 + 90 80 64.0 16.0 60 43.0 17.0 Pyroxasulfone  30 + 180 95 78.8 16.2 85 64.0 21.0

(105) TABLE-US-00011 TABLE 5 Combined effect of the mixed use of active component A and butachlor\acetochlor on weeds (post-emergence) Bristlegrass Abutilon Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E.sub.0 E − E.sub.0 value E value E.sub.0 E − E.sub.0 active component A 7.5 5 — — 10 — — 15 10 — — 15 — — Imazethapyr 22.5 45 — — 10 — — 45 50 — — 20 — — Pyroxasulfone 45 70 — — 50 — — 90 85 — — 65 — — active component A +  7.5 + 22.5 65 49.5 15.5 40 19.0 21.0 Imazethapyr 15 + 45 80 55.0 25.0 55 32.0 23.0 active component A + 7.5 + 45  95 71.5 23.5 75 55.0 20.0 Pyroxasulfone 15 + 90 100 86.5 13.5 90 70.3 19.7

(106) The test results (Table 4 and Table 5) indicated that under greenhouse conditions, the mixed use of the active component A and imazethapyr and pyroxasulfone for pre-emergence soil treatment and post-emergence stem and leaf treatment both had obvious synergism.

(107) TABLE-US-00012 TABLE 6 Combined effect of the mixed use of active component A and glufosinate-ammonium (glufosinate-P-ammonium) on weeds Bristlegrass Abutilon Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E.sub.0 E − E.sub.0 value E value E.sub.0 E − E.sub.0 active component A 15 10 — — 35 — — 60 35 — — 45 — — Glufosinate- 30 30 — — 40 — — ammonium 120 55 — — 60 — — Glufosinate-P- 30 40 — — 45 — — ammonium 120 65 — — 65 — — active component A + 15 + 30 55 37.0 18.0 80 61.0 19.0 glufosinate-ammonium  60 + 120 90 70.8 19.3 100 78.0 22.0 active component A + 15 + 30 65 46.0 19.0 80 64.3 15.8 glufosinate-P-ammonium  60 + 120 95 77.3 17.8 100 80.8 19.3

(108) TABLE-US-00013 TABLE 7 Combined effect of the mixed use of active component A and oxyfluorfen\acetofluran on weeds Bristlegrass Amaranthusretroflexus Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E.sub.0 E − E.sub.0 value E value E.sub.0 E − E.sub.0 active component A 15 20 — — 20 30 50 — — 65 Oxyfluorfen 22.5 15 — — 30 45 50 — — 60 Acetofluran 60 5 — — 35 90 30 — — 55 active component A +   15 + 22.5 50 32.0 18.0 65 44.0 21.0 oxyfluorfen 30 + 45 98 75.0 23.0 100 86.0 14.0 active component A + 15 + 60 40 24.0 16.0 70 48.0 22.0 acetofluran 30 + 90 90 65.0 25.0 100 84.3 15.7

(109) The test results (Table 6 and Table 7) indicated that under greenhouse conditions, the mixed use of the active component A and one of organophosphorus herbicides glufosinate-ammonium and glufosinate-P-ammonium, or diphenyl ether herbicides oxyfluorfen and acetofluran all had obvious synergism.

Example 12 Determination of Indoor Combined Effect of Compounding of Active Component A and Active Component B on Weeds

(110) The combined effect of the composition on the weeds was clarified by the indoor pot experiment.

(111) The weed cultivation and test material cultivation method was as follows: quantitative weed seeds abutilon and bristlegrass were respectively sown in a paper cup filled with nutrient soil with a diameter of 7 cm, and then cultivated in the greenhouse after covering the soil, suppressing and watering. The stem and leaf spray treatment was performed when the grass weeds grew to 5-7 leaf stage, and broad-leaved weeds grew to 6-8 leaf stage; the tests were repeated for 3 times. the treatment and drug solution naturally dried, the weeds were placed in the greenhouse to be managed according to conventional methods. According to the suppression or death of the weeds, a visual control effect investigation was conducted 30 days after the treatment.

(112) The application adopted the Gowing method to evaluate the combined effect of the proposed composition.

(113) $\mathrm{theoretical}\mathrm{value}{E}_0=X+Y-\frac{XY}{100}$

(114) In the formula:

(115) X—Weed control effect when the amount of herbicide component A is P;

(116) Y—Weed control effect when the amount of herbicide component B is Q;

(117) E.sub.0—Theoretical control effect when the amount of herbicide component A is P+theoretical control effect when the amount of herbicide component B is Q;

(118) E—The measured control effect after the herbicide component A and the herbicide component B are mixed according to the above ratio.

(119) When E−E.sub.0>10%, it is synergism; when E−E.sub.0<−10%, it is antagonism; when E−E.sub.0 value is between ±10%, it is addition.

(120) TABLE-US-00014 TABLE 1 Combined effect of the mixed use of active component A and active component B Abutilon Bristlegrass Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E0 E − E0 value E value E0 E − E0 Component A 3.75 10 — — 5 — — 7.5 25 — — 10 — — 15 40 — — 15 — — 30 55 — — 25 — — Glyphosate 37.5 10 — — 0 — — isopropylamine 75 20 — — 15 — — B 150 50 — — 30 — — 300 65 — — 45 — — Component A + 3.75 + 37.5  35 19.0 16 20 5.0 15.0 glyphosate 7.5 + 37.5 45 32.5 12.5 30 10.0 20.0 isopropylamine 7.5 + 75   60 40.0 20.0 45 23.5 21.5 B  15 + 37.5 60 46.0 14.0 30 15.0 15.0 15 + 75  70 52.0 18.0 50 27.8 22.2 15 + 150 90 70.0 20.0 70 40.5 29.5  30 + 37.5 75 59.5 15.5 45 25.0 20.0 30 + 75  80 64.0 16.0 55 36.2 18.8 30 + 150 95 77.5 17.5 65 47.5 17.5 30 + 300 100 84.2 15.8 85 58.8 26.2

(121) The test results (Table 1) indicated that the mixed use of active component A with active component B glyphosate isopropylamine showed obvious addition or synergism to broad-leaved weed abutilon and gramineous weed barnyardgrass.

Example 13

(122) The test targets were horseweed herb collected from Shenyang, Liaoning and goosegrass collected from Zhengzhou, Henan.

(123) TABLE-US-00015 TABLE 2 Combined effect of the mixed use of active component A and active component B on non-glyphosate resistant or tolerant weeds Horseweed herb (collected goosegrass (collected from from Shenyang, Liaoning) Zhengzhou, Henan) Dose Measured Theoretical Measured Theoretical Medicament (ga.i./hm.sup.2) value E value E0 E − E0 value E value E0 E − E0 Component A 3.75 10 — — 5 — — 7.5 30 — — 15 — — 15 35 — — 30 — — 30 55 — — 45 — — Glyphosate 37.5 25 — — 5 — — isopropylamine 75 35 — — 25 — — 150 65 — — 50 — — 300 70 — — 65 — — Component A + 3.75 + 37.5  50 32.5 27.5 25 9.8 15.2 glyphosate 7.5 + 37.5 60 47.5 12.5 35 19.2 15.8 isopropylamine 7.5 + 75   70 54.5 15.5 50 36.2 13.8 B  15 + 37.5 65 51.2 13.8 45 33.5 11.5 15 + 75  75 57.8 17.2 65 47.5 17.5 15 + 150 90 77.2 12.8 85 65.0 20.0 30 + 75  85 70.8 14.2 80 58.8 21.2 30 + 150 98 84.2 13.8 95 72.5 22.5 30 + 300 100 86.5 13.5 98 80.8 17.2

(124) The test results (Table 2) indicated that the combined effect of the mixed use of active component A with active component B glyphosate isopropylamine on non-glyphosate resistant or tolerant weeds, or tolerant weeds horseweed herb and goosegrass, is obvious synergism.

Field Herbicidal Activity Determination Example

Example 14

(125) The present application also conducted a medicinal efficacy test on weeds on the formulation examples containing herbicide active component A and active component B by the field plot test method, and clarified the control effect of the composition on non-cultivated weeds.

(126) According to the different components of different formulation examples, pre-emergence soil treatment, early post-emergence and post-emergence stem and leaf spray treatment were carried out respectively. The spraying device was Singapore Linong HD400 hand-operating knapsack sprayer (No. H17001), working pressure: 45 Pa, spray rate: 640 mL/min, adjustable cone spraying nozzle (325787), spraying nozzle height: 0.5 m, spray width: 0.85 m, walking speed: about 16.7 m/min, and spray volume: 4501/ha;

(127) TABLE-US-00016 TABLE 8 Control effect of the herbicidal composition comprising active component A and amide on non-cultivated weeds (pre-emergence) Dose Crab- Bristle- Lambs- Amaranthus- Medicament (ga.i./hm.sup.2) grass grass quarters retroflexus Example 2 200 50 40 55 50 composition 400 85 65 90 95 600 100 90 98 100 Example 3 200 70 60 70 60 composition 400 85 90 80 80 600 98 95 98 100 Dimethoxamide 600 70 50 70 55 Dimethoxamid-P 600 70 55 75 80 metolachlor 600 60 45 50 60 S-metolachlor 600 70 60 50 75

(128) TABLE-US-00017 TABLE 9 Control effect of the herbicidal composition comprising active componentA, imazethapyr and pyroxasulfone on non-cultivated weeds (early post-emergence) Echino- Dose chloacrus- Bristle- Amaranthus- Medicament (ga.i./hm.sup.2) galli grass retroflexus Abutilon Example 5 50 30 25 40 15 composition 100 80 75 90 60 200 100 90 100 90 Example 6 100 55 60 70 55 composition 200 75 80 80 85 400 100 95 90 100 Imazethapyr 100 60 50 70 45 Pyroxasulfone 200 15 35 60 30

(129) TABLE-US-00018 TABLE 10 Control effect of the herbicidal composition comprising active component A and organophosphorus and diphenyl ether on non-cultivated weeds (post-emergence) Echino- Dose chloacrus- Bristle- Amaranthus- Medicament (ga.i./hm.sup.2) galli grass retroflexus Abutilon Example 1 100 60 70 85 90 composition 200 90 95 95 90 300 100 95 98 100 Example 4 50 40 25 15 30 composition 100 95 98 100 90 200 100 100 100 100 Glufosinate- 100 60 50 70 65 ammonium Glufosinate-P- 100 60 45 80 70 ammonium Oxyfluorfen 100 85 65 80 80 Acetofluran 100 70 55 75 75

(130) The test results (Table 8 to Table 10) indicated that the formulation examples containing herbicide active component A and active component B had a good control effect on most broad-leaved weeds and gramineous weeds.

Example 15

(131) The death rate of weeds after application of the herbicidal composition of the present application was measured and compared with the herbicidal rate when a single component was used. The test used the method of indoor pot planting. At the time of treatment, abutilon and barnyardgrass were in 6-leaf stage. The test results indicated that when the active component A was mixed with the active component B glyphosate isopropylamine, the herbicidal speeds at different mixing ratios were all obviously better than that of the active component B glyphosate isopropylamine when used alone.

(132) TABLE-US-00019 TABLE 11 Control effect of herbicidal composition on weeds (visual observation %) Abutilon Echinochloacrusgalli 7 days 15 days 30 days 7 days 15 days 30 days Dose after after after after after after Medicament (ga.i./hm.sup.2) treatment treatment treatment treatment treatment treatment Component A + 50 61.3 66.4 65.5 37.7 72.5 90.2 component B 100 77.0 83.6 90.3 36.8 91.6 99.8 glyphosate 200 83.2 86.0 93.2 58.0 100 100 isopropylamine 400 98.6 94.9 99.6 87.5 100 100 (1:5) Component A 15 46.0 54.0 38.6 16.6 18.4 20.9 30 68.1 62.4 57.3 18.0 19.8 43.2 60 82.4 93.8 100 31.0 36.7 32.9 120 94.3 100 100 34.3 40.7 42.5 Component B 50 5.8 9.0 6.8 4.1 34.3 29.6 glyphosate 100 16.2 26.2 20.0 36.9 48.7 68.5 isopropylamine 200 24.6 38.3 62.6 62.2 63.9 100 400 43.5 38.0 79.9 66.7 64.5 99.0

(133) It could be seen from the above description that when the corresponding herbicidal formulations were prepared by using the two components of the present application as active components and applied, they also had very obvious synergism, and also reduced the amount of each active ingredient.