阅读说明：本技术 一种含异丙甲草胺与氟吡草酮的除草组合物 (Herbicidal composition containing metolachlor and fluroxypyr ) 是由 葛家成 李健 董德臻 刘金玲 于 2019-10-28 设计创作，主要内容包括：本发明属于农药领域,具体涉及一种含异丙甲草胺与氟吡草酮的除草组合物及其应用。所述除草组合物包括活性成分氟吡草酮、异丙甲草胺、氨唑草酮,该组合物能有效防除作物田中的常见杂草,具有扩大杀草谱、减少施用量、对作物安全、能够产生增效作用并解决抗性杂草等特点。(The invention belongs to the field of pesticides, and particularly relates to a herbicidal composition containing metolachlor and fluroxypyr and application thereof. The weeding composition comprises the active ingredients of the fluroxypyr, the metolachlor and the amicarbazone, can effectively prevent and kill off common weeds in crop fields, and has the characteristics of expanding a weeding spectrum, reducing application amount, being safe to crops, generating a synergistic effect, solving resistant weeds and the like.)

1. A weeding composition containing metolachlor and flurtamone is characterized in that active ingredients of the composition comprise flurtamone, metolachlor and amicarbazone.

2. A herbicidal composition according to claim 1, characterized in that the weight ratio of the active ingredients flurtamone, metolachlor, amicarbazone is 1-50:1-50:1-50, preferably 1-10:1-10: 1-10.

3. A herbicidal composition according to claim 1, characterized in that the weight ratio of the active ingredients flurtamone, metolachlor, amicarbazone is 2-4:5-15: 2-4.

4. A herbicidal composition according to claim 1, characterized in that the weight ratio of the active ingredients flurtamone, metolachlor, amicarbazone is 2-4:10-15: 3-4.

5. A herbicidal composition according to claim 1, characterized in that the weight percentage of fluroxypyr, metolachlor and amicarbazone in the herbicidal composition is 1-95%, preferably 10-80% of the total weight.

6. A herbicidal composition according to claim 1, wherein the herbicidal composition is in the form of any one of a powder, a dispersible tablet, a granule, a soluble powder, a soluble granule, a soluble tablet, a emulsifiable powder, an emulsifiable granule, a water dispersible granule, a wettable powder, a microencapsulated granule, a powder, a macrogranule, a water dispersible tablet, a microencapsulated suspension, a dispersible solution, an emulsifiable concentrate, an emulsifiable granule, an oil emulsion, an emulsifiable powder, an aqueous emulsion, a microemulsion, a dispersible oil suspension, an oil dispersible powder, a suspension, a soluble liquid, an ultra-low volume liquid; the preferable preparation formulation is any one of dispersible oil suspending agent, missible oil and suspending agent.

7. Use of the herbicidal composition according to any one of claims 1 to 6 for controlling unwanted vegetation.

8. Use of the herbicidal composition according to claim 7 for controlling unwanted vegetation, characterized in that the locus of the unwanted vegetation is a corn field; preferably, the unwanted vegetation is a grass and/or broadleaf weed; preferably, the grassy weeds are one or more of setaria viridis, digitaria sanguinalis and eleusine indica, and the broadleaf weeds are one or two of mucuna and amaranthus retroflexus.

9. A method for controlling undesired plants, characterized in that the herbicidal composition containing metolachlor and flurtamone according to any one of claims 1 to 8 is applied to the growing place and/or leaves and/or stems of the undesired plants; preferably, the growing field of the unwanted plants is a corn field; preferably, the unwanted vegetation is a grass and/or broadleaf weed; preferably, the grassy weeds are one or two of setaria viridis, digitaria sanguinalis and eleusine indica, and the broadleaf weeds are one or two of li and amaranthus retroflexus.

Technical Field

The invention belongs to the field of pesticides, and particularly relates to a herbicidal composition containing metolachlor and fluroxypyr and application thereof.

Background

Chemical weeding is the most economic and effective means in preventing and removing weeds in farmlands, but the problems of drug resistance and resistance evolution of weeds and the like are easily caused by using a single variety or a single action mode of chemical herbicide continuously at a high dose for a long time.

The chemical name of Metolachlor (metallachlor) is: 2-chloro-N- (2-ethyl-6-methylphenyl) -N- (2-methoxy-1-methylethyl) acetamide, which is a chloroacetamide cell division inhibitor, inhibits the synthesis of long-chain fatty acid, is a selective herbicide, inhibits germination mainly through the absorption of hypocotyl and bud, and can be used for preventing and removing annual gramineous weeds and some broadleaf weeds.

The chemical name of fluroxypyr (Bicyclopyrone) is: 4-hydroxy-3- {2- [ (2-methoxyethoxy) methyl ] -6- (trifluoromethyl) 3-pyridylcarboxy } bicyclo [3.2.1] oct-3-en-2-one is a triketone herbicide, is absorbed by plant roots and leaves and conducted in vivo, inhibits hydroxyphenylpyruvate dioxygenase (HPPD), causes tyrosine accumulation, stops biosynthesis of plastoquinone and tocopherol, further causes the content of chlorophyll to be reduced, makes plant meristematic tissue green-losing and leads to albino death.

Amicarbazone (Amicarbazone), also known as Amicarbazone, is chemically known as 4-amino-N-tert-butyl-4, 5-dihydro-3-isopropyl-5-oxo-1, 2, 4-1H-triazole-1-carboxamide, and is a photosynthesis inhibitor. The herbicide has the effects of contact killing and soil activity, can provide dual effects of knock down and persistence on weeds, and can be used for effectively preventing and treating main annual broadleaf weeds and gramineous weeds on corn and sugarcane due to the fact that a drug-receiving plant absorbs a drug through a root and a bud-stage weed absorbs through a leaf surface.

The herbicide mixture has the advantages of wide weeding spectrum, improvement of actual effect, delay of weed drug resistance, time saving and labor saving. Through pesticide formula screening, the control effect can be effectively improved, the dosage is reduced, the cost is reduced, and the generation of drug resistance of diseases, insects and weeds is delayed, so that the method is an important means for agricultural comprehensive treatment. The inventor carries out deep research on the formulas of the fluroxypyr, the metolachlor and the amicarbazone, finds that the fluroxypyr, the metolachlor and the amicarbazone are mixed, has a synergistic weeding effect on annual weeds in a corn field in a certain mixing proportion range, and further researches complete the invention.

Disclosure of Invention

The invention aims to solve the problems that a weeding preparation in the prior art is easy to generate drug resistance on farmland weeds and has poor actual control effect, and provides a weeding composition which has high efficiency, low toxicity, good quick action and long duration and is beneficial to comprehensive treatment of the farmland weeds.

Another object of the present invention is to use the composition for controlling weeds in agricultural fields, particularly suitable for controlling annual weeds in corn fields.

The technical scheme of the invention is as follows:

a weeding composition containing metolachlor and flurtamone comprises the effective components of flurtamone, metolachlor and amicarbazone, wherein the weight ratio of the active components of metolachlor, flurtamone and amicarbazone is 1-50:1-50: 1-50;

furthermore, the weight ratio of the effective components of the weeding composition, namely the flurtamone, the metolachlor and the amicarbazone is 1-10:1-30: 1-10;

furthermore, the weight ratio of the effective components of the weeding composition, namely the flurtamone, the metolachlor and the amicarbazone is 2-4:5-15: 2-4;

furthermore, the weight ratio of the effective components of the weeding composition, namely the flurtamone, the metolachlor and the amicarbazone is 2-4:10-15: 3-4;

further, the active ingredients of the weeding composition are fluroxypyr, metolachlor and amicarbazone in a weight ratio of 2:5:2, 2:5:3, 2:5:4, 1:5:1, 2:10:3, 1:5:3, 2:15:2, 2:15:3, 2:15:4, 3:5:2, 3:5:3, 3:5:4, 3:10:2, 3:10:3, 3:10:4, 3:15:2, 3:15:3, 3:15:4, 4:5:2, 4:5:3, 4:5:4, 2:5:1, 4:10:3, 2:5:2, 4:15:3 and 4:15: 4;

further, the weight ratio of the active ingredients of the weeding composition, namely the flurtamone, the metolachlor and the amicarbazone, is 2:10:4, 2:15:3, 2:15:4, 3:15:3, 3:15:4, 4:10:3, 4:15:3 and 4:15: 4.

The total weight of the active ingredients of the weeding composition accounts for 1-90 percent of the total weight of the composition, and preferably 10-80 percent.

The invention provides a herbicidal composition containing metolachlor and fluroxypyr, which can be prepared into a preparation formulation acceptable for pesticides according to a method known by a person skilled in the art, and the preparation formulation comprises a solid preparation and a liquid preparation;

further, the solid preparation is powder, dispersible tablets, granules, soluble powder, soluble granules, soluble tablets, milk powder, milk granules, water dispersible granules, wettable powder, micro-capsule granules, powder, macro-granules and water dispersible tablets;

further, the liquid preparation is microcapsule suspending agent, dispersible agent, missible oil, emulsion granules, oil emulsion, emulsion powder, aqueous emulsion, microemulsion, dispersible oil suspending agent, oil dispersible powder, suspending agent, soluble liquid agent and ultra-low volume liquid agent;

furthermore, the preferable preparation formulation of the preparation is dispersible oil suspending agent, missible oil and suspending agent;

further, the dispersible oil suspension can use the following auxiliaries: dispersants such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene sulfonate (diffuser NNO), etc.; the emulsifier is one or more of BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125 and BY-140), Nongru 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Nongru 2201, span-60 # (sorbitan monostearate), Tween-60 # (sorbitan monostearate polyoxyethylene ether), Nongru 1601# (phenethylphenol polyoxyethylene polyoxypropylene ether) and the like; wetting agents such as one or more of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, and the like; thickening agent such as one or more of white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; one or more of antifreeze such as ethylene glycol, propylene glycol, glycerol, urea, inorganic salts such as sodium chloride, etc.; dispersing medium such as one or more of soybean oil, rapeseed oil, wheat oil, methyl oleate, diesel oil, engine oil, mineral oil, etc.;

further, the emulsifiable concentrates may use as auxiliaries: emulsifiers such as fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, castor oil ethylene oxide adduct and its derivatives, polyoxyethylene polyoxypropylene block copolymer, calcium dodecylbenzenesulfonate; solvent such as one or more of trimethylbenzene, methyl oleate, N-dimethyl decanamide, dimethyl sulfoxide and propylene carbonate.

Further, the suspending agents may use as auxiliaries: dispersants such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene sulfonate (diffuser NNO), etc.; the emulsifier is one or more of BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125 and BY-140), Nongru 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Nongru 2201, span-60 # (sorbitan monostearate), Tween-60 # (sorbitan monostearate polyoxyethylene ether), Nongru 1601# (phenethylphenol polyoxyethylene polyoxypropylene ether) and the like; wetting agents such as one or more of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, and the like; thickening agent such as one or more of white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; one or more of antifreeze such as ethylene glycol, propylene glycol, glycerol, urea, inorganic salts such as sodium chloride, etc.; the carrier is deionized water;

further, the composition is missible oil, and the missible oil preferably comprises the following components in percentage by weight: 0.1-100 parts of fluroxypyr, 0.1-100 parts of metolachlor, 0.1-100 parts of amicarbazone, 0.1-20 parts of emulsifier, and the balance of solvent;

further, the composition is a suspending agent, and the suspending agent preferably comprises the following components in percentage by weight: 0.1-100 parts of fluroxypyr, 0.1-100 parts of metolachlor, 0.1-100 parts of amicarbazone, 1-15 parts of dispersing agent, 0.5-20 parts of emulsifier, 1-10 parts of wetting agent, 1-10 parts of thickening agent, 0-10 parts of antifreezing agent and the balance of deionized water;

further, the composition is a dispersible oil suspending agent, and the dispersible oil suspending agent preferably comprises the following components in percentage by weight: 0.1-100 parts of fluroxypyr, 0.1-100 parts of metolachlor, 0.1-100 parts of amicarbazone, 1-15 parts of dispersing agent, 0.5-20 parts of emulsifier, 1-10 parts of wetting agent, 1-10 parts of thickening agent, 0-10 parts of antifreezing agent and the balance of dispersion medium;

the invention has reasonable components, good weeding effect and low drug cost, and the activity and the weeding effect of the invention are not simple superposition of the activities of the components, but have obvious synergistic action, can expand the weed control spectrum, delay resistance, have good safety to crops and meet the safety requirement of pesticide preparations.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The following described examples are only preferred embodiments of the present invention, which can be used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Preparation examples of formulations

Example 1: 40% Fluopyrone, metolachlor, amicarbazone missible oil (2:15:3)

The formula is as follows: 4% of fluroxypyr, 30% of metolachlor, 6% of amicarbazone, 15% of dimethyl sulfoxide, 5% of fatty alcohol-polyoxyethylene ether, 9% of alkylphenol polyoxyethylene polyoxypropylene ether, 1% of calcium dodecyl benzene sulfonate and methyl oleate, and the balance is made up;

the preparation method comprises the following steps: adding active ingredients of flurtamone, metolachlor and amicarbazone into a carrier according to the proportion of the formula of the embodiment, adding a surfactant and other functional auxiliaries, and uniformly stirring and mixing in a stirring and mixing kettle to obtain the emulsifiable concentrate.

Example 2: a42% flurtamone-metolachlor-amicarbazone missible oil (1:5:1) formula: 6% of fluroxypyr, 30% of metolachlor, 6% of amicarbazone, 10% of N, N-dimethylcapramide, 2% of castor oil, 3% of calcium dodecyl benzene sulfonate and trimethylbenzene to make up the balance;

the preparation method comprises the following steps: the same as in example 1.

Example 3: 40% Fluopyrone, metolachlor, amicarbazone suspending agent (2:15:3)

The formula is as follows: 4% of fluroxypyr, 30% of metolachlor, 6% of amicarbazone, 2% of sodium alkyl sulfate, 3% of alkylphenol formaldehyde resin polyoxyethylene ether, 0.4% of carboxymethyl cellulose, 5% of propylene glycol, 0.2% of isothiazolinone and deionized water for balancing;

the preparation method comprises the following steps: according to the formula proportion, the effective components of the fluroxypyr, the metolachlor, the amicarbazone, the surfactant and other functional auxiliaries are sequentially placed in a reaction kettle, water is added for uniform mixing, and the suspending agent product is obtained through high-speed shearing, wet sanding and finally homogeneous filtration.

Example 4: 42% flurtamone-metolachlor-amicarbazone suspending agent (1:5:1)

The formula is as follows: 6% of fluroxypyr, 30% of metolachlor, 6% of amicarbazone, 10% of dodecyl polyoxyethylene ether phosphate, 2% of sodium alkyl polyoxyethylene ether sulfonate, 0.4% of magnesium aluminum silicate, 0.2% of carboxyethyl cellulose, 4% of sorbitol, 0.1% of sodium benzoate, 0.5% of silicone oil and deionized water to make up the balance;

the preparation method comprises the following steps: the same as in example 3.

Example 5: 32% Fluopyrone-metolachlor-amicarbazone dispersible oil suspending agent (1:5:2)

The formula is as follows: 4% of fluroxypyr, 20% of metolachlor, 8% of amicarbazone, 2% of sodium lignosulfonate, 5% of span-60 #, 5% of agricultural milk 700#, 4% of sodium naphthalene sulfonate, 1% of magnesium aluminum silicate, 4% of glycerol and rapeseed oil, and the balance is made up;

the preparation method comprises the following steps: according to the formula proportion, the active ingredients of the fluroxypyr, the metolachlor, the amicarbazone, the surfactant and other functional auxiliaries are sequentially placed in a reaction kettle, added with oil and uniformly mixed, and subjected to high-speed shearing, wet sanding and finally homogeneous filtration to obtain the product.

Example 6: 40% Fluopyrone-metolachlor-amicarbazone dispersible oil suspending agent (2:15:3)

The formula is as follows: 4% of fluroxypyr, 30% of metolachlor, 6% of amicarbazone, 2% of sodium lignosulfonate, 4% of farm milk 1601#, 3% of tween-60 #, 4% of farm milk 2201, 4% of sodium naphthalene sulfonate, 1% of magnesium aluminum silicate, 4% of glycerol and rapeseed oil, and the balance is made up;

the preparation method comprises the following steps: the same as in example 5.

Example 7: 32% Fluopyrone-metolachlor-amicarbazone dispersible oil suspending agent (1:5:2)

The formula is as follows: 4% of flurtamone, 20% of metolachlor, 8% of amicarbazone, 6% of phenyl ethyl phenol polyoxyethylene ether, 7% of sodium lignosulfonate, 20% of methyl oleate, 11% of organic pot leap soil, 11% of calcium dodecyl sulfonate and the balance of soybean oil;

the preparation method comprises the following steps: the same as in example 5.

Example 8: 42% Fluopyrone-metolachlor-amicarbazone dispersible oil suspending agent (1:5:1)

The formula is as follows: 6% of fluroxypyr, 30% of metolachlor, 6% of amicarbazone, 7% of phenethylphenol polyoxyethylene polyoxypropylene ether, 8% of naphthalenesulfonate, 1.6% of polyvinyl alcohol and soybean oil for supplementing the balance;

the preparation method comprises the following steps: the same as in example 5.

Example 9: 44% Fluopyrone-metolachlor-amicarbazone dispersible oil suspending agent (3:15:4)

The formula is as follows: 6% of fluroxypyr, 30% of metolachlor, 8% of amicarbazone, 2% of sodium polycarboxylate, 4% of farm milk 1601#, 3% of tween-60 #, 4% of farm milk 2201, 1% of sodium alkyl sulfate, 0.5% of bentonite, 5% of propylene glycol and the balance of soybean oil for supplementing the foot;

the preparation method comprises the following steps: the same as in example 5.

Example 10: 34% Fluopyrone-metolachlor-amicarbazone dispersible oil suspending agent (4:10:3)

The formula is as follows: 8% of fluroxypyr, 20% of metolachlor, 6% of amicarbazone, 2% of sodium lignosulfonate, 5% of span-60 #, 5% of agricultural milk 700#, 4% of sodium naphthalene sulfonate, 1% of magnesium aluminum silicate, 4% of glycerol and rapeseed oil, and the balance is made up;

the preparation method comprises the following steps: the same as in example 5.

Example 11 44% Fluopyrone-metolachlor-amicarbazone dispersible oil-miscible flowable concentrate (4:15:3)

The formula is as follows: 8% of fluroxypyr, 30% of metolachlor, 6% of amicarbazone, 2% of sodium lignosulfonate, 5% of span-60 #, 5% of agricultural milk 700#, 4% of sodium naphthalene sulfonate, 1% of magnesium aluminum silicate, 4% of glycerol and rapeseed oil, and the balance is made up;

the preparation method comprises the following steps: the same as in example 5.

Example 12 46% Fluopyrone-metolachlor-amicarbazone dispersible oil-miscible flowable concentrate (4:15:4)

The formula is as follows: 8% of fluroxypyr, 30% of metolachlor, 8% of amicarbazone, 7% of phenethylphenol polyoxyethylene polyoxypropylene ether, 8% of naphthalenesulfonate, 1.6% of polyvinyl alcohol and soybean oil for supplementing the balance;

the preparation method comprises the following steps: the same as in example 5.

Examples of indoor Activity

Example 11: the test basis is as follows: NY/T1155.4-2006 "indoor bioassay Standard for pesticides herbicide part 4: activity measurement test Stem and leaf spray method.

The test targets are crab grass, eleusine indica, quinoa and amaranthus retroflexus.

Reagent to be tested: 97% of fluroxypyr technical, 95% of metolachlor technical and 98% of amicarbazone technical are provided by research and development center of the Silier pharmaceutical industry group, Ltd.

Preparation of the medicament: dissolving the raw materials with dimethylformamide, diluting with 0.1% Tween 80 water solution, and preparing into 5 series of mass concentrations according to equal ratio method.

The test method comprises the following steps: respectively sowing the quantified grass seeds in pots with the diameter of 9cm, culturing in a light incubator, and performing spray treatment on 20 plants per pot when weeds grow to the 1-3 leaf stage. The cultivation is continued in the greenhouse after the treatment, the weed control effect of each treatment is regularly observed, and the fresh weight of each treated weed is recorded after 14 days.

And (3) test treatment: repeat for 4 times in each treatment setting, and set clear water as a control.

Data investigation: the fresh weight control effect of each treatment was calculated 21 days after the spray treatment.

The calculation formula is as follows:

the weed fresh weight ratio E is (fresh weight of treatment area x 100)/fresh weight of control area

Theoretical fresh weight ratio E of mixed system₀When the amount of herbicide a is P, the fresh weight percentage of herbicide B is Q, and when the amount of herbicide C is R, the fresh weight percentage of weeds is 100²

The combined action evaluation standard of the mixed medicament is as follows:

E0-E＞10% is synergistic, E₀-E < -10% is antagonistic, E₀E between. + -. 10% is additive.

The results of the tests are given in the following table:

TABLE 1 Fluopyrone, metolachlor, amicarbazone, paired digitaria sanguinalis indoor Activity

TABLE 3 indoor Activity of fluroxypyr, metolachlor, amicarbazone blend on goosegrass

TABLE 3 indoor Activity of Fluopyrone, metolachlor, amicarbazone, Paecilomyces quinoa

TABLE 4 indoor Activity of Fluopyrone, metolachlor, amicarbazone, matched pairs of Amaranthus retroflexus

The indoor activity can be known (see table 1-4), and the compound of the fluroxypyr, the metolachlor and the amicarbazone has good indoor activity on common weeds of crab grass, eleusine indica, quinoa and amaranth. The weight ratio of the three components is 2:5:2, 2:5:3, 2:5:4, 1:5:1, 2:10:3, 1:5:3, 2:15:2, 2:15:3, 2:15:4, 3:5:2, 3:5:3, 3:5:4, 3:10:2, 3:10:3, 3:10:4, 3:15:2, 3:15:3, 3:15:4, 4:5:2, 4:5:3, 4:5:4, 2:5:1, 4:10:3, 2:5:2, 4:15:3, 4:15: 4; the indoor combined action of the crab grass, the eleusine indica, the gooseberry and the redroot amaranth is synergistic or additive; the weight ratio of the fluroxypyr to the metolachlor to the amicarbazone is 2:10:4, 2:15:3, 2:15:4, 3:15:3, 3:15:4, 4:10:3, 4:15:3 and 4:15:4, and the indoor combined effect of the fluroxypyr, the goosefoot and the Amaranthus retroflexus is synergistic.

Test of field drug effect

Example 7: the field pesticide effect of the fluroxypyr, the metolachlor and the amicarbazone is controlled by mixing the fluroxypyr, the metolachlor and the amicarbazone.

Reagent to be tested: examples 1-12, control agents: 70% of metolachlor emulsifiable concentrate.

Test work: corn.

And (3) experimental design: the test was run for a total of 12 treatments and a clear water control, repeated 4 times per treatment, and 20 square meters per repetition.

The application method comprises the following steps: spraying stem and leaf, mixing the medicinal liquid according to the experimental design, and uniformly spraying on corn and weeds by using a knapsack high-pressure sprayer.

The investigation method comprises the following steps: and (3) pesticide effect investigation, namely, an absolute value investigation method is adopted, wherein 4 points are randomly selected in each cell, each point is 0.25 square meter, the variety, the plant number and the fresh weight of the residual weeds in 1 square meter are counted, and the plant number control effect and the fresh weight control effect are respectively calculated.

The number of plants is equal to (%) (number of weed plants in the blank control area-number of weed plants in the treatment area) ÷ number of weed plants in the blank control area × 100

Fresh weight control effect (%) - (fresh weight of weeds in blank control area-fresh weight of weeds in treated area) ÷ fresh weight of weeds in blank control area x 100

Crop safety survey: and (3) observing and recording the leaf color, the growth phase and the growth vigor of the crops while investigating the pesticide effect, and determining the safety of the pesticide to the crops.

The test results are shown in tables 5-7:

TABLE 5 visual results of weed control efficacy of Fluopyrone, metolachlor, amicarbazone on corn fields (5 days, 10 days)

TABLE 6 control effect of fluroxypyr, metolachlor, amicarbazone on different weeds in corn field (20, 30d)

TABLE 7 fresh weight control results of fluroxypyr, metolachlor, amicarbazone for controlling different weeds in corn fields (30 days)

The field efficacy test shows that, as shown in the table 5-7, the visual imitation of the mixed metolachlor, the flurtamone and the amicarbazone on the weeds in the corn field is higher than the control effect of the conventional single agent; the mixed application of metolachlor, Voronotrocha and amicarbazone in each embodiment has better plant control effect and fresh weight control effect than single-dose control effect on common weeds of large crabgrass, goosegrass, setaria viridis, goosefoots and Amaranthus retroflexus in corn fields.

The field safety test shows that the metolachlor, the flurtamone and the amicarbazone are mixed under different dosages, so that the metolachlor, the flurtamone and the amicarbazone have good safety to the corn, and the condition of phytotoxicity is not found.