Cornfield herbicidal composition and application thereof

Abstract

A cornfield herbicidal composition comprising pyrazolone compounds and an application thereof is provided. The cornfield herbicidal composition comprises an herbicidally effective amount of an active ingredient A, an active ingredient B, and a safener compound C, wherein the active ingredient A is a compound of the formula (I); the active ingredient B is selected from one or more of the following compounds: triazines, nitriles, sulfonylureas, pyridine carboxylic acids, benzyl carboxylic acids, bentazone, amides, pyridines and amicarbazone; and the safener compound C is selected from one or more of the following compounds: C1 isoxadifen-ethyl, C2 cyprosulfamide, C3 mefenpyr-diethyl, C4 cloquintocet-mexyl, C5 gibberellic acid, C6 furilazole and C7 N-(2-methoxybenzoyl)-4-[(methylaminocarbonyl)amino]benzenesulfonamide. The composition can effectively prevent and remove weeds in the cornfield, and has the characteristics of extending the weed control spectrum, reducing the application dose, being safe for crops, being able to remove resistant weeds and the like.

Claims

1. A cornfield herbicidal composition comprising an herbicidally effective amount of an active ingredient A and an active ingredient B, wherein, the active ingredient A is a compound of the formula ##STR00003## wherein R.sub.1 is hydrogen atom, methyl, ethyl, or cyclopropyl; R.sub.2 is methyl, ethyl, or isopropyl; R.sub.3 is ethoxy, 2-fluoroethoxy, 2,2-difluoroethoxy, or 2,2,2-trifluoroethoxy; R.sub.4 is chlorine atom or methyl; and R.sub.5, R.sub.6 and R.sub.7 are hydrogen atom, alkyl, alkoxy, halogen, halogen-substituted alkyl or a halogen-substituted alkoxy; the active ingredient B is selected from one or more of the following compounds: 1) a trazine selected from the group consisting of atrazine, metribuzin, and terbuthylazine; 2) a nitrile selected from the group consisting of bromoxynil, bromoxynil octanoate, and iodobenzonitrile; 3) a sulfonylurea selected from the group consisting of nicosulfuron, halosulfuron-methyl, foramsulfuron, and rimsulfuron; 4) a pyridine carboxylic acid selected from the group consisting of fluroxypyr, fluroxypyr-mepthyl, halauxifen-methyl, triclopyr, and clopyralid; 5) a benzyl carboxylic acid selected from dicamba; 6) bentazone; 7) an amide selected from the group consisting of acetochlor, butachlor, alachlor, propisochlor, and metolachlor; 8) pyridines: diflufenican, and picolinafen; and 9) amicarbazone.

2. The cornfield herbicidal composition according to claim 1, wherein in the active ingredient A, R.sub.1 is hydrogen atom; R.sub.2 is methyl or ethyl; R.sub.3 is ethoxy, 2-fluoroethoxy, 2,2-difluoroethoxy or 2, 2, 2-trifluoroethoxy; R.sub.4 is chlorine atom; R.sub.5, R.sub.6, R.sub.7 are hydrogen atom, alkyl, alkoxy, halogen, halogen-substituted alkyl or halogen-substituted alkoxy; and the active ingredient B is one or more of atrazine, metribuzin, terbuthylazine, bromoxynil octanoate, nicosulfuron, halosulfuron-methyl, fluroxypyr, halauxifen-methyl, dicamba, bentazone, butachlor, propisochlor, s-metolachlor, diflufenican, and amicarbazone.

3. The cornfield herbicidal composition according to claim 1, wherein in the active ingredient A, R.sub.1 is hydrogen atom; R.sub.2 is methyl or ethyl; R.sub.3 is ethoxy, 2,2-difluoroethoxy or 2, 2, 2-trifluoroethoxy; R.sub.4 is chlorine atom; R.sub.5 is methyl; R.sub.6 is methyl; and R.sub.7 is hydrogen atom.

4. The cornfield herbicidal composition according to claim 1, wherein the A and B of the herbicidal composition has a weight ratio of 1-100: 1-100.

5. The cornfield herbicidal composition according to claim 1, wherein the herbicidal composition further comprises a conventional pesticide adjuvant.

6. The cornfield herbicidal composition according to claim 5, wherein the conventional pesticide adjuvant comprises a carrier or a surfactant.

7. The cornfield herbicidal composition according to claim 1, wherein the herbicidal composition is in a specific dosage form of wettable powder, dispersible oil suspension, suspension, suspoemulsion, emulsifiable concentrate, water-dispersible granule, aqueous emulsion, or microemulsion.

8. The cornfield herbicidal composition according to claim 1, wherein the A and B of the herbicidal composition has a weight ratio of 1-30: 1-30.

9. The cornfield herbicidal composition according to claim 1, wherein the A and B of the herbicidal composition has a weight ratio of 1-20: 1-20.

10. The cornfield herbicidal composition according to claim 1, wherein the cornfield herbicidal composition further comprises a safener compound C selected from one or more of the following compounds: C1: isoxadifen-ethyl, C2: cyprosulfamide, C3: mefenpyr-diethyl, C4: cloquintocet-mexyl, C5: gibberellic acid, C6: furilazole and C7: N-(2-methoxybenzoyl)-4-[(methylaminocarbonyl)amino]benzenesulfonamide.

11. The cornfield herbicidal composition according to claim 10, wherein the A, B and C together account for 1-95% of the total weight of the herbicidal composition.

12. The cornfield herbicidal composition according to claim 10, wherein the A, B and C together account for 10-80% of the total weight of the herbicidal composition.

13. The cornfield herbicidal composition according to claim 10, wherein the A, B and C of the herbicidal composition has a weight ratio of 1-100: 1-100: 1-100.

14. The cornfield herbicidal composition according to claim 12, wherein the A, B and C of the herbicidal composition has a weight ratio of 1-30: 1-30: 1-30.

15. The cornfield herbicidal composition according to claim 12, wherein the A, B and C of the herbicidal composition has a weight ratio of 1-20: 1-20: 1-20.

16. The cornfield herbicidal composition according to claim 1, wherein in the active ingredient A, R.sub.1 is hydrogen atom; R.sub.2 is ethyl; R.sub.3 is 2, 2, 2-trifluoroethoxy; R.sub.4 is chlorine atom; R.sub.5 is methyl; R.sub.6 is methyl; and R.sub.7 is hydrogen atom; or wherein in the active ingredient A, R.sub.1 is hydrogen atom; R.sub.2 is methyl; R.sub.3 is 2,2-difluoroethoxy; R.sub.4 is chlorine atom; R.sub.5 is methyl; R.sub.6 is methyl; and R.sub.7 is hydrogen atom; or wherein in the active ingredient A, R.sub.1 is hydrogen atom; R.sub.2 is ethyl; R.sub.3 is ethoxy; R.sub.4 is chlorine atom; R.sub.5 is methyl; R.sub.6 is methyl; and R.sub.7 is hydrogen atom.

17. A method for controlling harmful weeds in a cornfield, comprising administering a cornfield herbicidal composition according to claim 1 to the cornfield.

18. A method for controlling harmful weeds in a cornfield, comprising administering a cornfield herbicidal composition according to claim 10 to the cornfield.

Description

SPECIFIC MODE FOR CARRYING OUT THE INVENTION

(1) The following examples provided are not intend to limit the invention, but merely to illustrate how the invention is carried out. These examples show particularly significant effectiveness to certain weeds.

(2) A. Examples

(3) The active ingredient A is one of compounds of the formula

(4) ##STR00002## when R.sub.1 is hydrogen, R.sub.2 is ethyl, R.sub.3 is 2,2,2-trifluoroethoxy, R.sub.4 is chlorine atom, R.sub.5 is methyl, R.sub.6 is methyl, and R.sub.7 is hydrogen atom, the compound is A.sub.1; when R.sub.1 is hydrogen, R.sub.2 is methyl, R.sub.3 is 2,2-difluoroethoxy, R.sub.4 is chlorine atome, R.sub.5 is methyl, R.sub.6 is methyl, and R.sub.7 is hydrogen atom, the compound is A.sub.2; when R.sub.1 is hydrogen, R.sub.2 is ethyl, R.sub.3 is ethoxy, R.sub.4 is chlorine atom, R.sub.5 is methyl, R.sub.6 is methyl, and R.sub.7 is hydrogen atom, the compound is A.sub.3.

(5) 1) Dispersible Oil Suspension

(6) When the active ingredient B is atrazine, and the safener compound C is isoxadifen-ethyl,

(7) The composition is: 6% A.sub.1+50% atrazine+1% isoxadifen-ethyl+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(8) 2) Dispersible Oil Suspension

(9) When the active ingredient B is atrazine, and the safener compound C is cyprosulfamide,

(10) The composition is: 3% A.sub.2+25% atrazine+1.5% cyprosulfamide+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(11) 3) Dispersible Oil Suspension

(12) When the active ingredient B is metribuzin, and the safener compound C is isoxadifen-ethyl,

(13) The composition is: 6% A.sub.3+20% metribuzin+0.75% isoxadifen-ethyl+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(14) 4) Dispersible Oil Suspension

(15) When the active ingredient B is metribuzin, and the safener compound C is cyprosulfamide.

(16) The composition is: 3% A.sub.1+10% metribuzin+0.25% cyprosulfamide+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(17) 5) Dispersible Oil Suspension

(18) When the active ingredient B is terbuthylazine, and the safener compound C is cyprosulfamide.

(19) The composition is: 6% A.sub.3+50% terbuthylazine+6% cyprosulfamide+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(20) 6) Dispersible Oil Suspension

(21) When the active ingredient B is diflufenican, and the safener compound C is mefenpyr-diethyl.

(22) The composition is: 12% A.sub.1+20% diflufenican+4% mefenpyr-diethyl+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(23) 7) Dispersible Oil Suspension

(24) When the active ingredient B is nicosulfuron, and the safener compound C is isoxadifen-ethyl,

(25) The composition is: 6% A.sub.1+2% nicosulfuron+3% isoxadifen-ethyl+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(26) 8) Dispersible Oil Suspension

(27) When the active ingredient B is halosulfuron-methyl, and the safener compound C is furilazole,

(28) The composition is: 3% A.sub.1+1.5% halsufluron-methyl+1% furilazole+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(29) 9) Dispersible Oil Suspension

(30) When the active ingredient B is dicamba, and the safener compound C is mefenpyr-diethyl,

(31) The composition is: 6% A.sub.2+10% dicamba+3% mefenpyr-diethyl+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(32) 10) Dispersible Oil Suspension

(33) When the active ingredient B is bentazone, and the safener compound C is mefenpyr-diethyl,

(34) The composition is: 3% A.sub.1+15% bentazone+1% mefenpyr-diethyl+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(35) 11) Dispersible Oil Suspension

(36) When the active ingredient B is fluroxypyr, and the safener compound C is isoxadifen-ethyl,

(37) The composition is: 1.5% A.sub.3+2% fluroxypyr+0.75% isoxadifen-ethyl+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(38) 12) Dispersible Oil Suspension

(39) When the active ingredient B is bromoxynil octanoate, and the safener compound C is cyprosulfamide,

(40) The composition is: 6% A.sub.1+15% bromoxynil octanoate+6% cyprosulfamide+5% phenemylphenol polyoxyethylene ether phosphate ester triethanolamine salt as a dispersant+5% polyoxyethylene aliphatate as an emulsifying agent+8% castor oil polyoxyethylene ether as an emulsifying agent+2% organobentonite as a thickening agent+methyl oleate as balance.

(41) 13) Suspension

(42) When the active ingredient B is atrazine, and the safener compound C is cyprosulfamide,

(43) The composition is: 6% A.sub.2+50% atrazine+3% cyprosulfamide+5% sodium lignosulfonate as a dispersant+2% Nekal as wetting agent+0.3% xanthan gum as a thickening agent+5% glycerol as an antifreezing agent+water as balance.

(44) The equipments: a mixing tank, a colloid mill, a sand mill, and a shearer etc.

(45) The process: all of the materials were fed into the mixing tank and mixed under stirring, introduced into the colloid mill, then subjected to 3-grade grinding in the sand mill, and finally sheared uniformly in the shearer to obtain the product.

(46) 14) Suspension

(47) When the active ingredient B is diflufenican, and the safener compound C is mefenpyr-diethyl,

(48) The composition is: 6% A.sub.3+10% diflufenican+1.5% mefenpyr-diethyl+5% sodium lignosulfonate as a dispersant+2% Nekal as wetting agent+0.3% xanthan gum as a thickening agent+5% glycerol as an antifreezing agent+water as balance.

(49) The equipments: a mixing tank, a colloid mill, a sand mill, and a shearer etc.

(50) The process: all of the materials were fed into the mixing tank and mixed under stirring, introduced into the colloid mill, then subjected to 3-grade grinding in the sand mill, and finally sheared uniformly in the shearer to obtain the product.

(51) 15) Suspension

(52) When the active ingredient B is terbuthylazine, and the safener compound C is cyprosulfamide,

(53) The composition is: 6% A.sub.1+50% terbuthylazine+6% cyprosulfamide+5% sodium lignosulfonate as a dispersant+2% Nekal as wetting agent+0.3% xanthan gum as a thickening agent+5% glycerol as an antifreezing agent+water as balance.

(54) The equipments: a mixing tank, a shearer, a colloid mill, and a sand mill etc.

(55) The process: A.sub.1, terbuthylazine, cyprosulfamide and the adjuvants etc. were fed into the mixing tank and mixed under stirring, introduced into the colloid mill, then subjected to 3-grade grinding in the sand mill to obtain the product.

(56) 16) Suspension

(57) When the active ingredient B is metribuzin, and the safener compound C is cyprosulfamide,

(58) The composition is: 6% A.sub.1+20% metribuzin+3% cyprosulfamide+5% sodium lignosulfonate as a dispersant+2% Nekal as wetting agent+0.3% xanthan gum as a thickening agent+5% glycerol as an antifreezing agent+water as balance.

(59) The equipments: a mixing tank, a shearer, a colloid mill, and a sand mill etc.

(60) The process: A.sub.1, metribuzin, cyprosulfamide and the adjuvants etc. were fed into the mixing tank and mixed under stirring, introduced into the colloid mill, then subjected to 3-grade grinding in the sand mill to obtain the product.

(61) 17) Water-dispersible Granule

(62) When the active ingredient B is atrazine, and the safener compound C is cyprosulfamide,

(63) The composition is: 6% A.sub.1+50% atrazine+4% cyprosulfamide+10% a naphthalene sulfonate as a dispersant+5% Nekal as wetting agent+1% polyvinyl alcohol as a disintegrant+diatomaceous earth as a filler as balance.

(64) The equipments: a jet mill, a coulter type mixer, a basket granulator, a drying oven, and a screening device etc.

(65) The process: the above materials were mixed uniformly, passed through the jet mill, kneaded, granulated, dried, and finally sieved to obtain a finished product.

(66) 18) Water-dispersible Granule

(67) When the active ingredient B is terbuthylazine, and the safener compound C is isoxadifen-ethyl,

(68) The composition is: 6% A.sub.2+50% terbuthylazine+3% isoxadifen-ethyl+10% a naphthalene sulfonate as a dispersant+5% Nekal as wetting agent+1% polyvinyl alcohol as a disintegrant+diatomaceous earth as a filler as balance.

(69) The equipments: a jet mill, a coulter type mixer, a basket granulator, a drying oven, and a screening device etc.

(70) The process: the above materials were mixed uniformly, passed through the jet mill, kneaded, granulated, dried, and finally sieved to obtain a finished product.

(71) 19) Water-dispersible Granule

(72) When the active ingredient B is butachlor, and the safener compound C is isoxadifen-ethyl,

(73) The composition is: 6% A.sub.3+50% butachlor+6% isoxadifen-ethyl+10% a naphthalene sulfonate as a dispersant+5% Nekal as wetting agent+1% polyvinyl alcohol as a disintegrant+diatomaceous earth as a filler as balance.

(74) The equipments: a jet mill, a coulter type mixer, a basket granulator, a drying oven, and a screening device etc.

(75) The process: the above materials were mixed uniformly, passed through the jet mill, kneaded, granulated, dried, and finally sieved to obtain a finished product.

(76) 20) Water-dispersible Granule

(77) When the active ingredient B is s-metolachlor, and the safener compound C is cyprosulfamide,

(78) The composition is: 6% A.sub.3+50% s-metolachlor+2% cyprosulfamide+10% a naphthalene sulfonate as a dispersant+5% Nekal as wetting agent+1% polyvinyl alcohol as a disintegrant+diatomaceous earth as a filler as balance.

(79) The equipments: a jet mill, a coulter type mixer, a basket granulator, a drying oven, and a screening device etc.

(80) The process: the above materials were mixed uniformly, passed through the jet mill, kneaded, granulated, dried, and finally sieved to obtain a finished product.

(81) 21) Water-dispersible Granule

(82) When the active ingredient B is amicarbazone, and the safener compound C is cyprosulfamide,

(83) The composition is: 18% A.sub.3+45% amicarbazone+6% cyprosulfamide+10% a naphthalene sulfonate as a dispersant+5% Nekal as wetting agent+1% polyvinyl alcohol as a disintegrant+diatomaceous earth as a filler as balance.

(84) The equipments: a jet mill, a coulter type mixer, a basket granulator, a drying oven, and a screening device etc.

(85) The process: the above materials were mixed uniformly, passed through the jet mill, kneaded, granulated, dried, and finally sieved to obtain a finished product.

(86) B. Efficacy Assays

(87) 1) Experimental conditions

(88) 1.1) Tested Targets

(89) Echinochloa crusgalli, Setaria viridis, Chenopodium album, Amaranthus retrollexus were collected from corn fields in Qingdao of Shandong Province. Sonchus brachyotus were collected from corn fields in Shenyang of Liaoning Province. Rhizoma Cyperi, Convolvulus arvensis were collected from corn fields in Shangqiu of Henan Province. Cirsium setosum were collected from corn fields in Xiantao of Hubei Province.

(90) The above weeds were cultivated by a pot culture method. A 180140 mm plastic nutritional bowl contained topsoil from the field was placed in an enamel pan, wherein the soil had been air-dried and screened and had an initial moisture content of 20%. Full and uniform weed seeds were selected, soaked in warm water at 25 C. for 6 hours, and germinated in a 28 C. biochemical incubator (darkness). The weed seeds that had just germinated were evenly placed on the surface of the soil and then covered with 0.7 cm soil, and cultured in a controllable sunlight greenhouse after being treated with agents. A certain amount of water was added to the enamel pan regularly to keep the soil moist.

(91) 1.2) Culture Conditions

(92) The culture was carried out in a controllable sunlight greenhouse at 18 to 30 C., in natural light, and relative humidity of 57% to 72%.

(93) The soil was loam with an organic matter content of 1.63%, a pH value of 7.1, an alkali-hydrolyzable nitrogen of 84.3 mg/kg, a rapidly available phosphorus of 38.5 mg/kg, and a rapidly available potassium 82.1 mg/kg.

(94) 1.3) Equipments and Apparatuses

(95) 3WP-2000-type Walking Spray Tower (Nanjing Institute of Agricultural Machinery, the Ministry of Agriculture); GA110-type ten thousandth Electronic Balance (Germany); ZDR2000-type Intelligent Data Recorder (Hangzhou Zeda Instrument Co., Ltd.); and SPX-type Intelligent Biochemical Incubator (Ningbo Jiangnan Instrument Factory).

(96) 2) Designs of Experiments

(97) 2.1) Reagents

(98) 2.1.1) Agents for the Experiment

(99) The active ingredient B for use was commercially available technical material, the active ingredient A was produced by our company, referring to the patent CN201511030154.6.

(100) The technical materials were all dissolved in acetone, and diluted with an aqueous solution containing 0.1% emulsifier T-80. The dilution is performed as required.

(101) 2.2) Experimental Treatments

(102) 2.2.1) Determination of Dosage

(103) A ratio of A to the active ingredient B and amounts thereof in each group depends on the characteristics and toxicity of the two agents, as well as the main application purpose of a corresponding formulation. Based on the pre-tests in this study, the dosage of A and the active ingredient B applied alone and in combination were shown in the tables, and a total 15 groups were designed. Water containing the solvent and emulsifier same with the above groups but free of the agents was used as a blank control.

(104) 2.2.2) Repetition of Experiments

(105) 3 pots with 20 weed seeds per pot were treated in one treatment with 4 replications per treatment, that is, a total of 60 weeds were treated in one treatment.

(106) 2.3) Treatment Method

(107) 2.3.1) The Timing and Frequency of the Treatment

(108) The agents were used for only once in the experiment. In the stage of weeds with 2 leaves and 1 core, the weeds were thinned out to maintain 15 weeds per pot and 45 weeds for each treatment, then continued to be cultured to 5-leaves and 1-core stage of Echinochloa crusgalli and Setaria viridis, and treated.

(109) 2.3.2) Equipments and Methods for Aapplying Agents

(110) The well-cultured weeds were evenly placed on a platform with an area of 0.5 m.sup.2, and a solution of agents was sprayed on the stems and leaves thereof by the 3WP-2000-type walking spray tower at a dosage of 30 kg/ha and at a spray pressure of 0.3 MPa. After all the solution was sprayed, the valve was closed. After 30 seconds, the door of the spray tower was opened, and the nutritional bowl was taken out. Then the valve was opened, and the spray tube was cleaned by spraying 50 ml of water.

(111) 3) Experimental Methods

(112) A pot-culture method was employed. For the cultivation of weeds, please refer to the Section 1.1, and Pesticide guidelines for laboratory bioactivity testsherbicides. As to a method for applying agents, please refer to the section 2.3.2, that is, a method for treating stems and leaves was employed.

(113) 4) Data Investigation and Statistical Analysis

(114) 4.1) Investigation Methods

(115) A method for investigating absolute number was employed, wherein whole seedlings of survival weeds were cut off with a blade along the soil surface, and the fresh weight of the weeds was weighed with an analytical balance. For dead weeds, the fresh weight thereof was zero.

(116) 4.2) Investigation Timing and Frequency

(117) The investigation was performed after 20 days of the treatment for only once.

(118) 4.3) Statistical Analysis of the Data

(119) Theoretical fresh weight inhibition rate of a combination of two active ingredients in each group was calculated by the Gowing method (E0=X+YX*Y/100), and then compared with an actually measured inhibition rate (E), thereby effect of the combination (hereafter referred to as combined effect) on weeds was evaluated: the value of EE0, which was greater than 10%, corresponded to a synergistic effect, the value of EE0, which was less than 10%, corresponded to an antagonistic effect, and the value of EE0, which was from 10% to 10%, corresponded to an additional effect. An optimum ratio of the two active ingredients was determined by the actual control effect, characteristics of herbicides, and balance of a corresponding formula.

(120) Wherein, in the formula, X represented the fresh weight inhibition rate of A in a dosage of P, and Y represented the fresh weight inhibition rate of the active ingredient B in a dosage of Q.

(121) The statistical results were shown in the tables below.

(122) TABLE-US-00001 TABLE 1 Actual control effect and combined effect of a combination of A and atrazine on weeds (Gowing method) Echinochloa crusgalli Setaria viridis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 54.2 45.7 90 82.1 81.6 180 100 100 atrazine 375 20.3 21.3 750 34.2 31.4 1500 45.1 41.4 A.sub.1 + 45 + 375 81.2 63.5 17.7 74.8 57.3 17.5 atrazine 45 + 750 93.2 69.9 23.3 79.2 62.8 16.4 45 + 1500 95.2 74.9 20.3 86.9 68.2 18.7 90 + 375 100 85.7 14.3 100 85.5 14.5 90 + 750 100 88.2 11.8 100 87.4 12.6 90 + 1500 100 90.2 9.8 100 89.2 10.8 180 + 375 100 100.0 0.0 100 100.0 0.0 180 + 750 100 100.0 0.0 100 100.0 0.0 180 + 1500 100 100.0 0.0 100 100.0 0.0

(123) TABLE-US-00002 TABLE 2 Actual control effect and combined effect of a combination of A and metribuzin on weeds (Gowing method) Echinochloa crusgalli Setaria viridis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 42.4 42.1 90 83.5 80.3 180 100 100 metribuzin 112.5 22.4 21.5 225 32.1 33.6 450 42.5 43.5 A.sub.1 + 45 + 112.5 71.3 55.3 16.0 75.9 54.5 21.4 metribuzin 45 + 225 81.6 60.9 20.7 82.4 61.6 20.8 45 + 450 88.7 66.9 21.8 87.3 67.3 20.0 90 + 112.5 100 87.2 12.8 100 84.5 15.5 90 + 225 100 88.8 11.2 100 86.9 13.1 90 + 450 100 90.5 9.5 100 88.9 11.1 180 + 112.5 100 100.0 0.0 100 100.0 0.0 180 + 225 100 100.0 0.0 100 100.0 0.0 180 + 450 100 100.0 0.0 100 100.0 0.0

(124) TABLE-US-00003 TABLE 3 Actual control effect and combined effect of a combination of A and terbuthylazine on weeds (Gowing method) Echinochloa crusgalli Setaria viridis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 42.4 39.9 90 83.5 81.2 180 100 100 terbuthylazine 375 31.4 25.2 750 42.1 30.6 1500 51.7 42.3 A.sub.1 + 45 + 375 84.2 66.6 25.0 80.1 55.0 25.1 terbuthylazine 45 + 750 91.6 72.2 26.1 89.7 58.3 31.4 45 + 1500 98.3 88.7 11.3 93.5 65.3 28.2 90 + 375 100 90.4 9.6 100 85.9 14.1 90 + 750 100 92.0 8.0 100 87.0 13.0 90 + 1500 100 100.0 0.0 100 89.2 10.8 180 + 375 100 100.0 0.0 100 100.0 0.0 180 + 750 100 100.0 0.0 100 100.0 0.0 180 + 1500 100 66.6 25.0 100 100.0 0.0

(125) TABLE-US-00004 TABLE 4 Actual control effect and combined effect of a combination of A and bromoxynil octanoate on weeds (Gowing method) Sonchus brachyotus Convolvulus arvensis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 32.1 23.2 90 53.2 38.9 180 78.8 48.2 bromoxynil 112.5 56.2 58.9 octanoate 225 78.3 79.2 450 99.2 98.1 A.sub.1 + 45 + 112.5 82.3 70.3 12.0 83.2 68.4 14.8 bromoxynil 45 + 225 96.3 85.3 11.0 94.2 84.0 10.2 octanoate 45 + 450 100 99.5 0.5 100 98.5 1.5 90 + 112.5 100 79.5 20.5 100 74.9 25.1 90 + 225 100 89.8 10.2 100 87.3 12.7 90 + 450 100 99.6 0.4 100 98.8 1.2 180 + 112.5 100 90.7 9.3 100 78.7 21.3 180 + 225 100 95.4 4.6 100 89.2 10.8 180 + 450 100 99.8 0.2 100 99.0 1.0

(126) TABLE-US-00005 TABLE 5 Actual control effect and combined effect of a combination of A and nicosulfuron on weeds (Gowing method) Echinochloa crusgalli Setaria viridis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 54.2 45.7 90 82.1 81.6 180 100 100 nicosulfuron 15 33.1 45.7 30 74.5 79.6 60 100 100 A.sub.1 + 45 + 15 88.3 69.4 18.9 85.3 70.5 14.8 nicosulfuron 45 + 30 98.9 88.3 10.6 94.5 88.9 5.6 45 + 60 100 100.0 0.0 100 100.0 0.0 90 + 15 100 88.0 12.0 100 90.0 10.0 90 + 30 100 95.4 4.6 100 96.2 3.8 90 + 60 100 100.0 0.0 100 100.0 0.0 180 + 15 100 100.0 0.0 100 100.0 0.0 180 + 30 100 100.0 0.0 100 100.0 0.0 180 + 60 100 100.0 0.0 100 100.0 0.0

(127) TABLE-US-00006 TABLE 6 Actual control effect and combined effect of a combination of A and halosulfuron-methyl on weeds (Gowing method) Rhizoma Cyperi actual fresh theoretical fresh dosage of active weight inhibition weight agents ingredient (g/hm.sup.2) rate (%) inhibition rate (%) E E0 A.sub.1 45 22.8 90 31.1 180 44.2 halosulfuron- 15 67.2 methyl 30 89.3 60 100 A.sub.1 + halosulfuron- 45 + 15 89.2 74.7 14.5 methyl 45 + 30 98.1 91.7 6.4 45 + 60 100 100.0 0.0 90 + 15 100 77.4 22.6 90 + 30 100 92.6 7.4 90 + 60 100 100.0 0.0 180 + 15 100 81.7 18.3 180 + 30 100 94.0 6.0 180 + 60 100 100.0 0.0

(128) TABLE-US-00007 TABLE 7 Actual control effect and combined effect of a combination of A and fluroxypyr on weeds (Gowing method) Cirsium setosum Convolvulus arvensis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 19.3 23.2 90 20.4 38.9 180 38.5 48.2 fluroxypyr 60 56.2 63.2 120 79.2 78.2 240 95.4 92.2 A.sub.1 + 45 + 60 89.2 64.7 24.5 83.6 71.7 11.9 fluroxypyr 45 + 120 95.4 83.2 12.2 94.7 83.3 11.4 45 + 240 100 96.3 3.7 100 94.0 6.0 90 + 60 100 65.1 34.9 100 77.5 22.5 90 + 120 100 83.4 16.6 100 86.7 13.3 90 + 240 100 96.3 3.7 100 95.2 4.8 180 + 60 100 73.1 26.9 100 80.9 19.1 180 + 120 100 87.2 12.8 100 88.7 11.3 180 + 240 100 97.2 2.8 100 96.0 4.0

(129) TABLE-US-00008 TABLE 8 Actual control effect and combined effect of a combination of A and dicamba on weeds (Gowing method) Chenopodium album Convolvulus arvensis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 19.1 23.2 90 30.2 38.9 180 48.7 48.2 dicamba 75 66.2 64.4 150 85.3 78.9 300 100 92.8 A.sub.1 + 45 + 75 87.2 72.7 14.5 83.6 72.7 10.9 dicamba 45 + 150 100 88.1 11.9 94.7 83.8 10.9 45 + 300 100 100.0 0.0 100 94.5 5.5 90 + 75 100 76.4 23.6 100 78.2 21.8 90 + 150 100 89.7 10.3 100 87.1 12.9 90 + 300 100 100.0 0.0 100 95.6 4.4 180 + 75 100 82.7 17.3 100 81.6 18.4 180 + 150 100 92.5 7.5 100 89.1 10.9 180 + 300 100 100.0 0.0 100 96.3 3.7

(130) TABLE-US-00009 TABLE 9 Actual control effect and combined effect of a combination of A and bentazone on weeds (Gowing method) Chenopodium album Rhizoma Cyperi theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 19.1 22.8 90 30.2 31.1 180 48.7 44.2 bentazone 150 56.5 65.3 300 75.9 83.5 600 94.3 92.1 A.sub.1 + 45 + 150 79.3 64.8 14.5 85.2 73.2 12.0 bentazone 45 + 300 92.1 80.5 11.6 97.4 87.3 10.1 45 + 600 100 95.4 4.6 100 93.9 6.1 90 + 150 85.2 69.6 15.6 100 76.1 23.9 90 + 300 100 83.2 16.8 100 88.6 11.4 90 + 600 100 96.0 4.0 100 94.6 5.4 180 + 150 100 77.7 22.3 100 80.6 19.4 180 + 300 100 87.6 12.4 100 90.8 9.2 180 + 600 100 97.1 2.9 100 95.6 4.4

(131) TABLE-US-00010 TABLE 10 Actual control effect and combined effect of a combination of A and butachlor on weeds (Gowing method) Echinochloa crusgalli Setaria viridis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 54.2 45.7 90 82.1 81.6 180 100 100 butachlor 375 2.4 2.7 750 3.9 3.8 1500 5.4 5.9 A.sub.1 + 45 + 375 78.9 55.3 23.6 65.7 47.2 18.5 butachlor 45 + 750 82.5 56.0 26.5 70.2 47.8 22.4 45 + 1500 83.7 56.7 27.0 76.8 48.9 27.9 90 + 375 93.6 82.5 11.1 86.8 82.1 4.7 90 + 750 95.9 82.8 13.1 90.8 82.3 8.5 90 + 1500 98.9 83.1 15.8 93.2 82.7 10.5 180 + 375 100 100.0 0.0 100 100.0 0.0 180 + 750 100 100.0 0.0 100 100.0 0.0 180 + 1500 100 100.0 0.0 100 100.0 0.0

(132) TABLE-US-00011 TABLE 11 Actual control effect and combined effect of a combination of A and s-metolachlor on weeds (Gowing method) Echinochloa crusgalli Setaria viridis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 54.2 45.7 90 82.1 81.6 180 100 100 s-metolachlor 375 2.5 2.9 750 3.4 3.9 1500 5.6 6.2 A.sub.1 + 45 + 375 77.3 55.3 22.0 66.2 47.3 18.9 s-metolachlor 45 + 750 81.4 55.8 25.6 66.1 47.8 18.3 45 + 1500 83.8 56.8 27.0 68.6 49.1 19.5 90 + 375 93.2 82.5 10.7 86.7 82.1 4.6 90 + 750 95.6 82.7 12.9 86.7 82.3 4.4 90 + 1500 96.4 83.1 13.3 86.6 82.7 3.9 180 + 375 100 100.0 0.0 100 100.0 0.0 180 + 750 100 100.0 0.0 100 100.0 0.0 180 + 1500 100 100.0 0.0 100 100.0 0.0

(133) TABLE-US-00012 TABLE 12 Actual control effect and combined effect of a combination of A and diflufenican on weeds (Gowing method) Echinochloa crusgalli Setaria viridis theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 54.2 45.7 90 82.1 81.6 180 100 100 diflufenican 75 7.2 3.9 150 9.4 8.3 300 10.3 10.5 A.sub.1 + 45 + 75 77.2 57.5 19.7 66.1 47.8 18.3 diflufenican 45 + 150 81.8 58.5 23.3 66.2 50.2 16.0 45 + 300 83.2 58.9 24.3 68.3 51.4 16.9 90 + 75 93.1 83.4 9.7 83.3 82.3 1.0 90 + 150 95.3 83.8 11.5 89.1 83.1 6.0 90 + 300 96.2 83.9 12.3 93.6 83.5 10.1 180 + 75 100 100.0 0.0 100 100.0 0.0 180 + 150 100 100.0 0.0 100 100.0 0.0 180 + 300 100 100.0 0.0 100 100.0 0.0

(134) TABLE-US-00013 TABLE 13 Actual control effect and combined effect of a combination of A and amicarbazone on weeds (Gowing method) Chenopodium album Amaranthus retroflexus theoretical theoretical dosage of actual fresh fresh actual fresh fresh active weight weight weight weight ingredient inhibition inhibition inhibition inhibition agents (g/hm.sup.2) rate (%) rate (%) E E0 rate (%) rate (%) E E0 A.sub.1 45 19.1 45.7 90 30.2 81.6 180 48.7 100 amicarbazone 112.5 36.5 21.6 225 45.9 31.9 450 64.3 41.8 A.sub.1 + 45 + 112.5 69.3 48.6 20.7 76.9 57.4 19.5 amicarbazone 45 + 225 72.1 56.2 15.9 79.8 63.0 16.8 45 + 450 83.4 71.1 12.3 83.7 68.4 15.3 90 + 112.5 72.2 55.7 16.5 100 85.6 14.4 90 + 225 80.3 62.2 18.1 100 87.5 12.5 90 + 450 87.2 75.1 12.1 100 89.3 10.7 180 + 112.5 85.2 67.4 17.8 100 100.0 0.0 180 + 225 83.1 72.2 10.9 100 100.0 0.0 180 + 450 86.9 81.7 5.2 100 100.0 0.0

(135) C. Pilot Sites

(136) Tests using the herbicidal compositions prepared in Examples 1) to 21) to control weeds in cornfields.

(137) In 2014, a demonstration popularization test was conducted at 25 pilot sites in 5 corn areas in Dezhou in Shandong Province, SuiHua in Heilongjiang Province, Gongzhuling in Jilin Province, Shenyang in Liaoning Province and Baoding in Hebei Province. Corn varieties in different demonstration areas were shown in Table 14.

(138) TABLE-US-00014 TABLE 14 Corn varieties in different demonstration areas Demonstration area Corn variety Dezhou in Shandong Province Denghai series SuiHua in Heilongjiang Province Xianyu 335 Gongzhuling in Jilin Province Huayu series Shenyang in Liaoning Province Liyu series Baoding in Hebei Province Zhengdan 958

(139) Experimental methods: In the stage of 3 leaves and 1 core of the corn and 3-5 leaves of the weed, the agent was evenly sprayed on stems and leaves through a manual sprayer, wherein the amount of added water was 15 kg/667 m.sup.2, the specific tested agents and dosage thereof were shown in Table 15. The area of the pilot site was 50 square meters, and each treatment was repeated for 4 times. The weed control efficiency after 45 days of application was shown in Table 15, and the safety of corn was shown in Table 16.

(140) $\mathrm{Weed}\mathrm{control}\mathrm{efficiency}\left(\%\right)=\frac{\begin{array}{c}\begin{array}{c}\mathrm{number}\mathrm{of}\mathrm{weed}\mathrm{strains}\mathrm{in}\mathrm{the}\mathrm{water}\\ \mathrm{control}\mathrm{area}\text{-}\mathrm{number}\mathrm{of}\mathrm{weed}\end{array}\\ \begin{array}{c}\mathrm{strains}\mathrm{in}\mathrm{the}\mathrm{area}\mathrm{treated}\\ \mathrm{with}\mathrm{agents}\end{array}\end{array}}{\begin{array}{c}\mathrm{number}\mathrm{of}\mathrm{weed}\mathrm{strains}\mathrm{in}\mathrm{the}\\ \mathrm{water}\mathrm{control}\mathrm{area}\end{array}}$

(141) TABLE-US-00015 TABLE 15 Controlling effect in pilot sites dosage Weed control efficiency in different pilot sites (%) Agents (g a.i./ha) Dezhou Suihua Gongzhuling Shenyang Baoding Example 1) (56% OD) 840 91.3 90.7 91.4 89.9 90.7 Example 2) (28% OD) 840 92.5 90.2 91.5 91.2 90.4 Example 3) (26% OD) 390 92.4 91.6 92.4 92.0 90.5 Example 4) (13% OD) 390 92.0 90.5 93.8 90.0 91.8 Example 5) (56% OD) 840 91.3 91.3 91.2 90.8 90.2 Example 6) (28% OD) 840 88.8 95.5 92.4 90.5 88.5 Example 7) (8% OD) 120 90.9 89.6 87.1 86.2 84.8 Example 8) (4.5% OD) 105 92.7 90.2 87.5 87.5 86.6 Example 9) (16% OD) 240 97.3 94.9 88.6 92.2 92.4 Example 540 90.4 92.5 93.7 95.8 93.4 10) (18% OD) Example 180 88.0 88.4 85.5 88.7 84.6 11) (3.5% OD) Example 315 91.3 92.7 89.3 88.6 89.3 12) (21% OD) Example 13) (56% SC) 840 91.0 93.3 89.9 96.3 91.2 Example 14) (16% SC) 240 89.3 91.5 92.2 90.8 94.4 Example 15) (56% SC) 840 92.3 91.7 90.2 88.9 87.7 Example 16) (26% SC) 390 93.5 97.2 97.5 91.2 90.6 Example 840 92.8 91.6 92.4 87.0 90.5 17) (56% WDG) Example 840 94.0 90.5 89.8 97.0 91.8 18) (56% WDG) Example 840 91.3 94.3 91.9 89.8 90.2 19) (56% WDG) Example 840 93.5 97.2 97.5 91.2 90.6 20) (56% WDG) Example 315 96.1 93.3 94.2 87.2 88.8 21) (63% WDG) Dispersible oil 90 82.8 79.6 82.4 86.0 80.5 suspension of 10% active ingredient A.sub.1 Dispersible oil 90 79 76.1 85.4 82.3 84.2 suspension of 10% active ingredient A.sub.2 Dispersible oil 90 84.5 81.5 79.1 81.9 82.7 suspension of 10% active ingredient A.sub.3 Suspension of 50% 112.50 14.4 12.6 16.3 19.3 14.2 atrazine Suspension of 50% 300 14.4 12.6 16.3 19.3 14.2 metribuzin Suspension of 50% 112.50 13.7 10.9 16.8 18.3 13.9 terbuthylazine water-dispersible 150 14.4 12.6 16.3 19.3 14.2 granule of 50% diflufenican Dispersible oil 60 83.7 80.9 86.8 88.3 83.9 suspension of 4% nicosulfuron Dispersible oil 45 14.4 12.6 16.3 19.3 14.2 suspension of 10% halosulfuron-methyl 200 g/L Emulsifiable 120 52.8 59.6 52.4 46.0 40.5 concentrate of fluroxypyr 480 g/L Emulsifiable 150 34.4 62.6 66.3 59.3 54.2 concentrate of dicamba 480 g/L Aqueous 300 34.4 32.6 26.3 29.3 24.2 solution of bentazone Emulsifiable 300 20.7 27.5 20.3 23.9 28.4 concentrate of 25% bromoxynil octanoate Emulsifiable 112.50 1.4 1.6 1.3 1.3 1.2 concentrate of 50% butachlor Emulsifiable 112.50 2.7 1.9 1.8 1.3 2.9 concentrate of 96% s-metolachlor Water-dispersible 225 21.2 23.4 24.1 25.1 24.9 granule 70% amicarbazone Water control (CK)

(142) TABLE-US-00016 TABLE 16 Safety of the corn in the pilot sites dosage Safety of the corn Agents (g a.i./ha) Dezhou Suihua Gongzhuling Shenyang Baoding Example 1) (56% OD) 840 safety safety safety safety safety Example 2) (28% OD) 840 safety safety safety safety safety Example 3) (26% OD) 390 safety safety safety safety slight scorched Example 4) (13% OD) 390 slight safety safety safety safety scorched Example 5) (56% OD) 840 safety safety safety safety safety Example 6) (28% OD) 840 safety safety safety safety safety Example 7) (8% OD) 120 safety safety safety safety safety Example 8) (4.5% OD) 105 safety safety safety safety safety Example 9) (16% OD) 240 safety safety safety safety safety Example 10) (18% OD) 540 safety safety safety safety safety Example 11) (3.5% OD) 180 safety safety safety safety safety Example 12) (21% OD) 315 safety safety slight safety safety scorched Example 13) (56% SC) 840 safety safety safety safety safety Example 14) (16% SC) 240 safety safety safety safety safety Example 15) (56% SC) 840 safety safety safety safety safety Example 16) (26% SC) 390 safety safety safety safety slight scorched Example 840 safety safety safety safety safety 17) (56% WDG) Example 840 safety safety safety safety safety 18) (56% WDG) Example 840 safety safety safety safety safety 19) (56% WDG) Example 840 safety safety safety safety safety 20) (56% WDG) Example 315 safety safety safety safety safety 21) (63% WDG) Dispersible oil 90 safety safety safety safety safety suspension of 10% active ingredient A.sub.1 Dispersible oil 90 safety safety safety safety safety suspension of 10% active ingredient A.sub.2 Dispersible oil 90 safety safety safety safety safety suspension of 10% active ingredient A.sub.3 Suspension of 50% 112.50 safety safety safety safety safety atrazine Suspension of 50% 300 slight safety slight slight slight metribuzin scorched scorched scorched scorched Suspension of 50% 112.50 slight safety slight slight slight terbuthylazine scorched scorched scorched scorched water-dispersible 150 safety safety safety safety safety granule of 50% diflufenican Dispersible oil 60 safety safety safety safety safety suspension of 4% nicosulfuron Dispersible oil 45 safety safety safety safety safety suspension of 10% halosulfuron-methyl 200 g/L Emulsifiable 120 safety slightly safety slightly safety concentrate of curly curly fluroxypyr 480 g/L Emulsifiable 150 slightly slightly slightly slightly slightly concentrate of dicamba curled curly curly curly curly 480 g/L Aqueous 300 safety safety safety safety safety solution of bentazone Emulsifiable 300 slight slight slight slight slight concentrate of 25% scorched scorched scorched scorched scorched bromoxynil octanoate Emulsifiable 112.50 safety safety safety safety safety concentrate of 50% butachlor Emulsifiable 112.50 safety safety safety safety safety concentrate of 96% s-metolachlor Water-dispersible 225 slight slight slight slight slight granule 70% scorched scorched scorched scorched scorched amicarbazone Water control (CK)

(143) Note: types of the weed community in each of the demonstration areas were as follows: Dezhou: Echinochloa crusgalli+Setaria virdis+Digitaria sanguinalis+Chenopodium album+Amaranthus retroflexus; Suihua: Echinochloa crusgalli+Setaria virdis+Abutilon avicennae+Xanthium sibiricum+Chenopodium album+Amaranthus retroflexus; Gongzhuling: Echinochloa crusgalli+Setaria virdis+Abutilon avicennae+Xanthium sibiricum+Commelina communica; Shenyang: Echinochloa crusgalli+Setaria virdis+Eriochloa+Panicum miliaceum; and Baoding: Echinochloa crusgalli+Setaria virdis+Digitaria sanguinalis+Amaranthus retroflexus+Chenopodium album.

(144) After making extensive experimentations and explorations, the present inventors have unexpectedly discovered that when a mixture of a compound A, an active ingredient B and a safener compound C is used for the control of Gramineae weeds for postemergence application in cornfields, surprising and unexpected synergistic effects are achieved, especially the mixture exhibits significantly synergistic effects on the control of Gramineae weeds such as Echinochloa crusgalli and Setaria viridis, broad-leaf weeds such as Chenopodium album, Abutilon avicennae, and Convolvulus arvernsis, and Gyperaceae weeds such as Rhizoma Cyperi etc., thereby reducing application dose, being safe for corns and reducing environmental pollution, and the rational compounding leads to reduced agricultural costs and highly effective control of weeds resistant to ALS inhibitors. The inventive compositions have a good application prospect.