Weeding composition containing halauxifen-methyl and flufenacet and application thereof

Abstract

The invention discloses a weeding composition containing halauxifen-methyl and flufenacet and application thereof.The active ingredients of the weeding composition containing halauxifen-methyl and flufenacet are composed of halauxifen-methyl and flufenacet, and the weight ratio of halauxifen-methyl to flufenacet is (1-30): (20-95); according to the invention, two active components with different action mechanisms are combined for use, so that the generation of drug resistance of weeds can be effectively reduced, and the herbicide controlling spectrum is expanded; gramineous weeds, broadleaf weeds, nutgrass flatsedge and other weeds can be prevented and removed at the same time; the weeding composition has a remarkable synergistic effect, the dosage of a single compound is reduced, meanwhile, a good action level is kept, the weed control spectrum is remarkably widened, the dosage is reduced, and environmental pollution is reduced; the composition has double effects of sealing and killing, germinated weeds can be prevented and killed by applying the composition once, non-germinated weeds can also be sealed, the prevention and control time of the weeds is prolonged, and the workload of farmers is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticides, and specifically relates to a herbicide composition containing clofopyralid and flufenacet and application thereof. Background Art

[0002] Rice is one of the main food crops in my country. Various weeds in rice fields seriously affect rice yields. Chemical weed control is one of the main means of weed control in agriculture. In recent years, due to the long-term use of conventional herbicides in rice fields, weed resistance has become more and more prominent, prevention and control has become more and more difficult, and the prevention and control effect is difficult to guarantee. Through scientific and reasonable pesticide compounding, the selection of herbicidal compositions with significant synergistic effects can not only improve the prevention and control effect and expand the prevention and control spectrum, but also slow down the development of weed resistance, reduce the amount of pesticides used, reduce environmental pollution, and extend the service life of pesticides.

[0003] Based on this, a herbicide composition containing clofopyralid and flufenacet and its application are designed. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a herbicide composition containing chlorpyrifos-butyl and flufenacet and its application, which effectively solves the problems raised in the above background.

[0005] To achieve the above object, the present invention provides the following technical solution: a herbicidal composition containing clofopyralid and flufenacet, wherein the active ingredients of the herbicidal composition are composed of clofopyralid and flufenacet, and the weight ratio of clofopyralid to flufenacet is 1-30:20-95.

[0006] Preferably, the weight ratio of clofopyralid to flufenacet is 1-20:30-90.

[0007] Preferably, the weight ratio of clofopyralid to flufenacet is 1:4.

[0008] Preferably, the total weight percentage of clofopyralid and flufenacet in the composition is 1%-90%.

[0009] Preferably, the total weight percentage of clofopyralid and flufenacet in the composition is 20%-80%.

[0010] Preferably, the formulation of the herbicidal composition includes at least one of wettable powder, suspension, microemulsion, water emulsion, water dispersible granules, emulsifiable concentrate, suspoemulsion, dispersible oil suspension, soluble solution, water dispersible tablet, granules and the like.

[0011] Application of a herbicidal composition containing clofopyralid and flufenacet in the field of weed control in rice fields.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention can effectively reduce the occurrence of weed resistance and expand the weed control spectrum by combining two active ingredients with different action mechanisms; it can simultaneously control weeds such as grass, broad-leaved weeds and sedges;

[0014] 2. The herbicidal combination has a significant synergistic effect, reduces the dosage of a single compound, while maintaining a good level of action, significantly broadens the weed control spectrum, reduces the dosage of the drug and reduces environmental pollution;

[0015] 3. The combination has a dual effect of blocking and killing. One application of the pesticide can not only prevent and kill the weeds that have already germinated, but also have a blocking effect on the weeds that have not yet germinated, thereby extending the weed prevention and control time and reducing the workload of farmers. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] The invention provides a herbicidal composition containing cypermethrin and flufenacet. The active ingredients of the herbicidal composition consist of cypermethrin and flufenacet, and the weight ratio of cypermethrin to flufenacet is 1-30:20-95.

[0018] The weight ratio of clofopyralid and flufenacet is 1-20:20-90.

[0019] The preferred weight ratio of clofopyralid to flufenacet is 1:4.

[0020] The total weight percentage of clofopyralid and flufenacet in the composition is 1%-90%.

[0021] Preferably, the total weight percentage of clofopyralid and flufenacet in the composition is 20%-80%.

[0022] The dosage form of the herbicidal composition includes at least one of wettable powder, suspension, microemulsion, aqueous emulsion, water dispersible granules, emulsifiable concentrate, suspoemulsion, dispersible oil suspension, soluble solution, water dispersible tablet, granule and the like.

[0023] Among them, the better dosage forms include suspension, oil suspension, water dispersible granules, wettable powder, water dispersible tablets, and granules.

[0024] The suspension dosage form is composed by weight percentage:

[0025] Cloflupyralid 1%-30%, flufenacet 10%-70%, dispersant 1%-15%, wetting agent 1%-15%, thickener 0-3%, antifreeze 1%-5%, defoamer 0-3%, deionized water carrier to 100%;

[0026] The specific production steps are: the active ingredients and other auxiliary agents are mixed, dispersed by high-speed shearing, and sand-milled in a sand mill to form a highly dispersed and stable suspension system in an aqueous medium to obtain a suspension agent with a corresponding weight percentage.

[0027] The oil suspension dosage form is composed by weight percentage:

[0028] Cloflupyralid 1%-30%, flufenacet 10%-70%, dispersant 0-5%, methyl oleate emulsifier 5%-20%, thickener 0-3%, liquid oil carrier to 100%;

[0029] The specific production steps are: the active ingredients and other additives are mixed, dispersed by high-speed shearing and sand-milled in a sand mill to form a highly dispersed and stable suspension system in an oil-based medium to obtain an oil suspension with a corresponding weight percentage.

[0030] The water dispersible granule dosage form is composed by weight percentage:

[0031] Cloflupyralid 1%-30%, flufenacet 10%-70%, dispersant 1%-12%, wetting agent 1-15%, disintegrant 1%-5%, solid carrier is supplemented to 100%;

[0032] The specific production steps are: the active ingredients and other auxiliary agents are mixed evenly, crushed with an ultra-fine air flow mill, kneaded, and then added into a fluidized bed granulation dryer for granulation, drying, and sieving to obtain water-dispersible granules with corresponding weight percentage.

[0033] The wettable powder formulation is composed by weight percentage:

[0034] Cloflupyralid 1%-30%, flufenacet 10%-70%, dispersant 1%-15%, wetting agent 1%-10%, solid carrier is supplemented to 100%;

[0035] The specific production steps are: mix the active ingredients and other auxiliary agents, grind them mechanically and then grind them by air flow, mix them evenly, and prepare wettable powders with corresponding weight percentage.

[0036] The defoaming agent is one or more of silicone compounds, epoxy soybean oil, methanol, silicone oil and the like.

[0037] The antifreeze agent is one or more of glycerol, propylene glycol, diethylene glycol, urea and the like.

[0038] The wetting agent is one or more of sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, sodium butylnaphthalene sulfonate, sodium alkyl sulfonate, tea dregs powder, saponin powder, soapberry powder and the like.

[0039] The dispersant is one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, naphthalene sulfonate formaldehyde condensate, p-methoxy fatty amide benzene sulfonic acid, lignin sulfonate, polycarboxylate, alkylphenol polyoxyethylene ether sulfate, alkylbenzene sulfonate calcium salt, fatty acid ester sulfate, alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, etc.

[0040] The disintegrant is one or more of sodium carboxymethyl starch, low-substituted hydroxypropyl cellulose, cross-linked sodium carboxymethyl cellulose, cross-linked polyvinylpyrrolidone, chitosan, sodium alginate, sodium bicarbonate, magnesium chloride, aluminum chloride, sodium chloride, urea, ammonium sulfate, bentonite, etc.

[0041] The thickener is one or more of polyvinyl acetate, xanthan gum, gelatin, gum arabic, magnesium aluminum silicate, phenolic resin, hydroxymethyl cellulose, sodium alginate and the like.

[0042] The solid carrier is one or more of light calcium carbonate, clay, kaolin, diatomaceous earth, bentonite, white carbon black, clay, attapulgite, talc, quartz sand and the like.

[0043] The liquid carrier is one or more of soybean oil, corn oil, rapeseed oil, turpentine, methyl oleate, coconut oil, palm oil and the like.

[0044] The deionized water is industrial deionized water.

[0045] Application of a herbicidal composition containing clofopyralid and flufenacet in the field of weed control in rice fields.

[0046] The specific implementation modes of the present invention are described in detail below in conjunction with the embodiments, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0047] Example 1: Indoor toxicity test of clofopyralid and flufenacet to barnyardgrass.

[0048] Test method: Select weeds with the same growth pattern, plant them, and treat their stems and leaves. Water them until the leaves are dry, and then spray them. After 30 days of treatment, measure the fresh weight and calculate the control effect.

[0049] The herbicide combination was evaluated according to the Colby method. Evaluation criteria: when E-E0>10%, it is a synergistic effect; when -10%≤E-E0≤10%, it is an additive effect; when E-E0<-10%, it is an antagonistic effect.

[0050] Table 1 Indoor toxicity test of fluopyramide and flufenacet against barnyardgrass

[0051]

[0052] As can be seen from the above table, the combination of clofopyralid and flufenacet has a significant synergistic effect on barnyard grass, can effectively reduce the dosage of pesticides used, and slow down the development of weed resistance. The preferred weight ratio of clofopyralid and flufenacet is 1-10:30-90; the particularly preferred weight ratio of clofopyralid and flufenacet is 1:4.

[0053] Example 2 Preparation Formula Example

[0054] Preparation 1: 40% clofopyralid-flufenacet suspension

[0055] Cloflupyralid 8%, flufenacet 32%, lignin sulfonate 2%, naphthalene sulfonate formaldehyde condensate 3%, sodium dodecylbenzene sulfonate 2%, xanthan gum 0.1%, ethylene glycol 3%, silicone defoamer 0.3%, kasone 0.3, deionized water carrier is supplemented to 100%;

[0056] Formulation 2: 20% clofopyralid-flufenacet oil suspension

[0057] Cloflupyralid 8%, flufenacet 12%, sodium dodecylbenzene sulfonate 8%, alkylphenol polyoxyethylene ether 5%, fatty alcohol polyoxyethylene ether: 5%, organic bentonite 1%, white carbon black: 2%, methyl oleate to 100%;

[0058] Formulation 3: 80% clofopyralid-flufenacet water dispersible granules

[0059] Cloflupyralid 10%, flufenacet 70%, polycarboxylate 6%, sodium lauryl sulfate 2.5%, ammonium sulfate 3%, kaolin to 100%;

[0060] Formulation 4: 70% clofopyralid-flufenacil wettable powder

[0061] Cloflupyralid 35%, flufenacet 35%, lignin sulfonate 3%, alkylphenol polyoxyethylene ether formaldehyde condensate 2%, sodium lauryl sulfate 3%, kaolin to 100%;

[0062] Preparation 5: 3% clofopyralid-flufenacil granules

[0063] Cloflupyralid 1%, flufenacet 2%, lignin sulfonate 3%, sodium lauryl sulfate 2%, quartz sand to 100%;

[0064] Example 3 The effect of the combination of clofopyralid and flufenacet on weed control in the field.

[0065] Test objects: Echinochloa crusgalli, Cyperus difformis, Amaranthus water chestnut, Potamogeton chinensis, Leptochloa chinensis, Allium fortunei, Sagittaria sagittifolia, etc.

[0066] Test drugs: Preparations 1-5 and control drugs

[0067] Test method: According to the area of ​​the test plot, weigh the pesticide and dilute it with water. When the weeds are in the 2-3 leaf stage, use a backpack sprayer to spray the stems and leaves once. Investigate the fresh weight control effect after 30 days and compare the herbicidal activity of various pesticides.

[0068] Control effect (%) = [(fresh weight of weeds in the clear water control group - fresh weight of weeds in the treated group) / fresh weight of weeds in the clear water group] * 100%.

[0069] Table 2 Field control effect of clofopyralid and flufenacet on weeds

[0070]

[0071] Table 3 Results of the investigation on the safety of pesticides on crops

[0072]

[0073]

[0074] It can be seen from Table 2 and Table 3 that, compared with single agents, the combined application of clofopyralid and flufenacet can expand the herbicidal spectrum and significantly improve its control effect on weeds, has a significant synergistic effect, can effectively reduce the application dosage of pesticides, and reduce environmental pollution; and field observations show that it is safe for rice.

[0075] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0076] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A herbicidal composition containing clofopyralid and flufenacet, characterized in that: The active ingredients of the herbicidal composition consist of clofopyralid and flufenacet, and the weight ratio of clofopyralid to flufenacet is 1-30:20-95.

2. A herbicidal composition containing chlorpyrifos-butyl and flufenacet according to claim 1, characterized in that: The weight ratio of clofopyralid and flufenacet is 1-20:30-90.

3. A herbicidal composition containing chlorpyrifos-butyl and flufenacet according to claim 2, characterized in that: The weight ratio of clofopyralid to flufenacet is 1:

4.

4. A herbicidal composition containing chlorpyrifos-methyl and flufenacet according to claims 1-3, characterized in that: The total weight percentage of clofopyralid and flufenacet in the composition is 1%-90%.

5. A herbicidal composition containing chlorpyrifos-butyl and flufenacet according to claim 4, characterized in that: The total weight percentage of clofopyralid and flufenacet in the composition is 20%-80%.

6. A herbicidal composition containing chlorpyrifos-butyl and flufenacet according to any one of claims 1 to 5, characterized in that: The dosage form of the herbicidal composition includes at least one of wettable powder, suspension, microemulsion, aqueous emulsion, water dispersible granules, emulsifiable concentrate, suspoemulsion, dispersible oil suspension, soluble solution, water dispersible tablet, granule and the like.

7. Use of the herbicidal composition containing clofopyralid and flufenacet according to any one of claims 1 to 6 in the field of weed control in rice fields.

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