CN114158563A

CN114158563A - Weeding composition containing cinmethylin and application thereof

Info

Publication number: CN114158563A
Application number: CN202111576169.8A
Authority: CN
Inventors: 张磊; 刘润峰; 陈坤; 吴晓敢; 陆建才; 于斌
Original assignee: Jiangsu Mingde Lida Crop Technology Co ltd
Current assignee: Jiangsu Mingde Lida Crop Technology Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-03-11
Anticipated expiration: 2041-12-22
Also published as: CN114158563B

Abstract

The invention discloses a weeding composition containing cinmethylin and application thereof. The weeding composition disclosed by the invention is combined with the cycloheptane ether, the penoxsulam and the cyhalofop-butyl according to the proportion disclosed by the invention, so that the weeding effect can be effectively improved; the herbicide composition can prevent and control various different kinds of weeds which are generated in a mixed mode, has a good prevention and control effect on conventional gramineous weeds, nutgrass flatsedge and broadleaf weeds in the paddy fields, is low in dosage, saves cost, reduces pollution to the environment, is quick to take effect after application, is safe to crops, and has positive effects on the aspects of retarding weed resistance, reducing the dosage of the herbicide and the like.

Description

Weeding composition containing cinmethylin and application thereof

Technical Field

The invention relates to the technical field of pesticides, and particularly relates to a weeding composition containing cinmethylin, penoxsulam and cyhalofop-butyl and application thereof.

Background

At present, rice is one of four most important grain crops in China, and the problem that weeds in a paddy field compete for nutrients and sunlight with the rice is always a main factor influencing the yield of the rice. The reasonable application of the herbicide is one of the direct and effective means for removing weeds, is limited by the safety of paddy rice, has a limited weed control spectrum, simultaneously uses different herbicides aiming at different weeds, consumes a large amount of manpower, material resources and financial resources, causes environmental pollution, and easily generates drug resistance when a large amount of herbicides with single active ingredient are continuously used.

Aiming at the problems that a large amount of pesticides are used to pollute the environment, and the pesticide cost and the labor cost of farmers are increased, a synergistic herbicide composition is developed, and the synergistic effect is generated after the active ingredients of the herbicide are compounded, so that the problems of large dosage and poor effect of a single herbicide can be solved, the generation of drug resistance of weeds can be delayed by utilizing the interactive use of different pesticides, and an ideal use effect is obtained. Therefore, it is urgently needed to develop a herbicide composition which can utilize different action mechanisms to combine and control the weeds in the paddy field, and can obtain synergistic effect, and the herbicide composition can be more effectively used for controlling the weeds in the paddy field, and has less dosage and wider weeding spectrum. The above herbicidal compositions are the subject of hot research on effective removal of weeds in paddy fields.

The cinmethylin is a compound 1, 4-epoxy-p-benzene

-2-yl 2-methylbenzyl ether, having a trade name of cinmethyl, molecular formula of C18H26O2, relative molecular mass of 274.4, CAS accession No. 87818-31-3, and structural formula shown in formula (1):

formula (1). Cycloheptane ether is a cineole (cineole) herbicide, which is an Acyl Carrier Protein (ACP) for inhibiting the growth of meristems, and a FAT selective inhibitor for inhibiting fatty acid biosynthesis and damaging cell membranes, so that weeds die.

Penoxsulam is named in English: penoxsulam, CAS accession number: 219714-96-2, sulfonamide herbicides, chemical name: 3- (2, 2-difluoroethoxy) -N- (5, 8-dimethoxy- [1,2,4] triazolo [1,5-C ] pyrimidin-2-yl) - α, α, α -trifluoromethylphenyl-2-sulfonamide of formula: C16H14F5N5O5S, molecular weight: 483.37, the structural formula is shown in formula (2):

formula (2). Penoxsulam (penoxsulam) is a triazolopyrimidine sulfonamide herbicide that acts by inhibiting acetolactate synthase (ALS). Penoxsulam is a conductive herbicide, is absorbed by stem leaves, buds and root systems, is conducted to meristems through xylem and phloem to inhibit plant growth, so that growing points lose green, terminal buds turn red and necrotize after treatment for 2 weeks, and the growing points lose green after plant death for 3-4 weeks.

Cyhalofop butyl, the english name of Cyhalofop butyl; the chemical name is: (R) -butyl 2- [ 4-cyano-2-fluorophenoxy ] phenoxy ] propionate; (R) -butyl 2- [4- (4-cyano-2-fluorophenoxy) phenoxy ] propionate; thousand of gold. CAS accession number: 122008-85-9, belonging to the aryloxyphenoxypropionic acid herbicides, chemical name: (R) -2- [4 (4-cyano-2-fluorophenoxy) phenoxy ] -propionic acid butyl ester of formula: C20H20FNO4, molecular weight: 357.4, the structural formula is shown in formula (3):

formula (3). Cyhalofop-butyl aryloxyphenoxypropionic acid herbicides, varieties with high safety to rice, like other varieties in this category, are systemic conductive herbicides, paddy field selective herbicides, which are absorbed by leaves and leaf sheaths of plants, conducted by phloem, accumulated in meristematic regions of plants, resist acetyl-coa carboxylase (ACCase), stop fatty acid synthesis, prevent cell growth and division, and destroy lipid-containing structures such as membrane systems, eventually leading to plant death. The weed die from the absorption of cyhalofop-butyl into the weed is slow, and generally 3-4 weeks are needed.

The composition of penoxsulam and cyhalofop-butyl is a herbicide composition which is more effective in preventing and controlling rice weeds, but the drug resistance in rice fields has been shown after years of use. Those skilled in the art have also been studying related pesticide formulation compositions to address the resistance problems that arise with penoxsulam and cyhalofop-butyl. For example:

CN201410067622.6 (publication No. CN103814919A) discloses an oil suspension containing cyhalofop-butyl, pyriminobac-methyl and penoxsulam, wherein the effective active ingredients of the oil suspension are cyhalofop-butyl, pyriminobac-methyl and penoxsulam, and the oil suspension contains, by mass, 5-30% of cyhalofop-butyl, 1-10% of pyriminobac-methyl and 1-10% of penoxsulam. However, the composition has the problem of having an undesirable effect on sedges and broadleaf weeds in paddy fields.

One skilled in the art would know whether a combination of pesticidal ingredients would be synergistic would not be expected. Therefore, the development of a composition with synergistic effect can prevent and control gramineous weeds, nutgrass flatsedge and broadleaf weeds in the paddy fields, and the novel herbicide with safety, environmental protection, high efficiency and low toxicity is particularly urgent to solve the problems that the resistance is further enhanced, the prevention difficulty is further increased and the like because the existing paddy field weeds are usually prevented and controlled by increasing the pesticide dosage.

Disclosure of Invention

The invention aims to provide a pesticide composition which solves the problem that the difficulty of weed control is increased due to the resistance generated by the long-term use of the current herbicide, in particular to the resistance problem generated by the long-term use of the penoxsulam and cyhalofop-butyl.

Through long-term research, the applicant finds that the resistance problem caused by the penoxsulam and cyhalofop-butyl composition is solved, and the obtaining of a novel weeding composition with synergistic effect is very difficult. Applicants have studied a variety of pesticides, for example, oxadiazon, clomazone and the like, in combination with penoxsulam and cyhalofop-butyl to find that no synergistic effect is produced, and conversely, that compositions produce an antagonistic effect. The applicant has also studied other ternary compositions, such as cinmethylin-bispyribac-sodium cyhalofop-butyl, cinmethylin-penoxsulam-bispyribac-sodium, but has not found a suitable ternary composition with synergistic effect.

In the research process, the applicant unexpectedly finds that the composition of the cinmethylin, the penoxsulam and the cyhalofop-butyl can effectively solve the problem of resistance increase caused by the composition of the penoxsulam and the cyhalofop-butyl, and the composition has a good synergistic effect in the weed control process, thereby greatly reducing the usage amount of pesticides.

One aspect of the present application provides a synergistic herbicidal composition comprising cinmethylin, penoxsulam and cyhalofop-butyl.

In a further aspect of the present invention, in the pesticide composition, the penoxsulam is contained in an amount of 0.01 to 80 parts by weight and the cyhalofop-butyl is contained in an amount of 0.01 to 95 parts by weight, based on 1 part by weight of the cycloheptane ether.

In the above composition, preferably, the penoxsulam is contained in an amount of 0.1 to 17 parts by weight and the cyhalofop-butyl is contained in an amount of 0.5 to 35 parts by weight, relative to 1 part by weight of the cycloheptane ether.

More preferably, the penoxsulam is contained in an amount of 1 to 2.5 parts by weight and the cyhalofop-butyl is contained in an amount of 1 to 6 parts by weight with respect to 1 part by weight of the cycloheptane ether.

In another aspect, the invention provides a formulation comprising the above composition and a suitable pesticidal adjuvant.

The herbicide composition in the preparation accounts for 1-95%, preferably 5-80%, more preferably 5-60% of the weight of the preparation.

Preferably, the content of the pesticide adjuvant component is 0.01-95 parts by weight relative to 1 part by weight of the active ingredient in the preparation; preferably, the content of the adjuvant ingredient is 1 to 80 parts by weight with respect to 1 part by weight of the active ingredient.

Optionally, the adjuvant component of the present invention comprises at least one of a wetting agent, a dispersing agent, an emulsifier, an organic solvent, a thickener, an organic suspending medium, an anti-freeze agent, an anti-foaming agent, a binder, a disintegrant, water, a solid inert carrier, and a preservative.

Furthermore, the pesticide composition provided by the invention is in a dosage form of one of oil suspending agent, microemulsion, wettable powder, missible oil, water aqua, microcapsule suspending agent, aqueous emulsion, granules and water dispersible granules.

In another aspect, the present invention provides the use of the above composition or herbicidal formulation for the control of weeds in the field after emergence of rice seedlings, such as, but not limited to, grasses and annual sedges and broadleaf weeds.

Preferably, the field crop rice weeds are at least one of barnyard grass, pongamia, potamogeton sinense, amaranthus, cyperus esculentus and water chestnut.

The beneficial effects of the invention include, but are not limited to:

1. the composition of the invention has a synergistic effect, which is unexpected;

2. the cinmethylin, penoxsulam and cyhalofop-butyl in the herbicide composition are compounded for use, so that the drug resistance of weeds can be remarkably delayed;

3. the ternary composition provided by the invention has a broadened weeding spectrum, and can be used for preventing and treating various weeds under the condition of reducing the using amount of pesticides;

4. the three-component composition provided by the invention has the advantages that the pesticide active ingredients are combined according to the proportion, the weeding composition which is equivalent to that of a single compound can be provided under the condition of obviously reduced application rate, the dosage is low, the cost can be reduced, the weed control level is maintained or improved compared with that of the single compound, the effect is fast after the application, the safe weeding composition is displayed for the applied rice crops, and the pollution to the environment is reduced.

Detailed Description

The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are intended for purposes of illustration and explanation only and are not intended to limit the scope of the invention.

The invention provides a pesticide composition containing cinmethylin, penoxsulam and cyhalofop-butyl. Wherein, in the pesticide composition, relative to 1 part by weight of the cycloheptane ether, the content of the penoxsulam is 0.01-80 parts by weight, and the content of the cyhalofop-butyl is 0.01-95 parts by weight. Within this range, the ternary composition of the present invention shows a strong synergistic effect.

In the further composition of the cycloheptane ether, the penoxsulam and the cyhalofop-butyl, relative to 1 part by weight of the cycloheptane ether, the penoxsulam content is 0.1-17 parts by weight, and the cyhalofop-butyl content is 0.5-35 parts by weight; preferably, the penoxsulam is contained in an amount of 1-2.5 parts by weight and the cyhalofop-butyl is contained in an amount of 1-6 parts by weight relative to 1 part by weight of the cycloheptane ether. Within the above preferred range, the synergistic effects of the composition of cinmethylin, penoxsulam and cyhalofop-butyl of the present invention are more prominent.

In order to better exert the performance of the herbicide composition, the herbicide composition can be combined with a suitable pesticide adjuvant to prepare a pesticide preparation, wherein the content of the adjuvant is 0.01-95 parts by weight relative to 1 part by weight of the active ingredient; preferably, the content of the adjuvant ingredient is 1 to 80 parts by weight with respect to 1 part by weight of the active ingredient. The used auxiliary components are in the optimal range, and the three active components can be comprehensively and rapidly applied to the bodies of the weeds to play a role, so that the activity on the weeding effect is further improved.

In one possible implementation of the above herbicide composition, the adjuvant ingredient comprises at least one of a wetting agent, a dispersing agent, an emulsifier, an organic solvent, a thickener, an organic suspension medium, an anti-freeze agent, an antifoaming agent, a binder, a disintegrant, water, a solid inert carrier, and a preservative. In the present invention, the auxiliary is not particularly limited, and a component commonly used in the art may be selected as needed. These ingredients can be selected from conventional amounts according to the formulation of the existing herbicide composition, which is well known to those skilled in the art and will not be described herein.

For the auxiliary ingredients commonly used in the field, the wetting agent can be one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, fatty alcohol-polyoxyethylene ether, sodium di-sec-octyl maleate sulfonate, nekal BX, sodium lauryl sulfate, wetting penetrant F and wetting agent T;

further, the dispersant can be one or more of diisobutyl naphthalene sulfonate, polyacrylate, phenol sulfonic acid or naphthalene sulfonate, lignosulfonate, polycarboxylate, alkyl naphthalene sulfonate, polycarboxylate and methylene dinaphthyl sodium sulfonate;

the emulsifier can be selected from one or more of fatty acid polyoxyethylene ether, alkylphenol polyoxyethylene ether, sulfosuccinate, styryl phenol polyoxyethylene ether, nonylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, polyoxyethylene octyl anisole, calcium dodecylbenzene sulfonate, octylphenol or sodium nonylphenol dodecylbenzene sulfonate, triphenyl phenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, ethoxylated isooctyl ether, fatty amine polyoxyethylene ether and triphenyl phenol polyoxyethylene ether phosphate;

the solvent can be one or more of cyclohexanone, water, ethanol, ethylene glycol monomethyl ether, isopropanol, methanol acetone, solvent oil, N, N-dimethylformamide and isoamylol;

the thickening agent can be one or more of white carbon black, xanthan gum, polyvinyl alcohol, magnesium aluminum silicate, polyethylene glycol, polyvinylpyrrolidone, hydroxymethyl cellulose and organic bentonite;

the organic auxiliary suspension medium can be one or more of methyl oleate, methyl vegetable oil, soybean oil, peanut oil, corn oil, rapeseed oil, olive oil and palm oil;

the antifreeze can be one or more of urea, ethylene glycol, polyethylene glycol 400, propylene glycol, 1, 2-propylene glycol, glycerol and sodium chloride;

the defoaming agent can be one or more of polyether, organic silicon and modified silicon polyether;

the binder can be one or more of sucrose, maltose, dextrin and sodium gluconate;

the disintegrating agent can be one or more of sodium chloride, urea, sodium sulfate, polyvinylpyrrolidone, ammonium sulfate, sodium carbonate, sodium carboxymethyl starch and bentonite;

the solid inert carrier can be one or more of starch, diatomite, kaolin, montmorillonite, attapulgite, bentonite, talcum powder and light calcium carbonate;

the preservative can be selected from one or more of cason, benzoic acid and sodium benzoate;

according to another aspect of the present invention, the preparation of the herbicide composition of the present invention can be prepared into various common dosage forms, and the dosage form of the herbicide can be one of oil suspension, suspending agent, microemulsion, wettable powder, missible oil, aqueous solution, microcapsule suspending agent, aqueous emulsion, granules and water dispersible granules. The preparation method can be used for preparing the various dosage forms by adopting the preparation method known in the field, and the details are not repeated.

According to the invention, different pesticide adjuvant ingredients can be selected for the herbicide composition according to different formulations.

For example, the herbicidal composition of the present invention may be prepared as an oil suspension concentrate, and the adjuvant ingredients may include emulsifiers, dispersants, solvents, thickeners, organic suspending flotation media; relative to 1 weight part of the active ingredient, the content of the emulsifier is 5-20 weight parts, the content of the dispersant is 5-10 weight parts, the content of the solvent is 5-30 weight parts, the content of the thickener is 1-5 weight parts, and the content of the organic suspending medium is 20-60 weight parts.

Alternatively, the herbicidal composition of the present invention may be prepared as a suspension concentrate, and the adjuvant ingredients may include a dispersant, a wetting agent, a thickener, a preservative, an antifreeze, an antifoaming agent and water; relative to 1 weight part of the active ingredient, the content of the dispersing agent is 5-20 weight parts, the content of the wetting agent is 5-10 weight parts, the content of the thickening agent is 1-5 weight parts, the content of the preservative is 0.1-5 weight parts, the content of the antifreezing agent is 1-20 weight parts, the content of the defoaming agent is 0.1-5 weight parts, and the content of the water is 5-70 weight parts.

Alternatively, the herbicidal composition of the present invention may be prepared as an emulsifiable concentrate, and the adjuvant component may include an emulsifier and a solvent; the content of the emulsifier is 5-20 parts by weight and the content of the solvent is 5-70 parts by weight relative to 1 part by weight of the active ingredient.

Alternatively, the herbicidal composition of the present invention may be prepared as a microemulsion, and the adjuvant ingredients may include an emulsifier, a solvent, an anti-freezing agent, an antifoaming agent and water; relative to 1 weight part of the active component, the content of the emulsifier is 5-20 weight parts, the content of the solvent is 5-30 weight parts, the content of the antifreeze is 0.5-5 weight parts, the content of the defoamer is 0.1-10 weight parts, and the content of the water is 5-70 weight parts.

Or the herbicide composition can be prepared into water dispersible granules, and the auxiliary agent components can comprise a dispersing agent, a wetting agent, a disintegrating agent and a solid inert carrier; relative to 1 weight part of the active ingredient, the content of the dispersing agent is 5-20 weight parts, the content of the wetting agent is 1-10 weight parts, the content of the disintegrating agent is 0.5-20 weight parts, and the content of the solid inert carrier is 0.1-50 weight parts.

Alternatively, the herbicide composition of the invention can be prepared into wettable powder, and the auxiliary ingredients can comprise a wetting agent, a dispersing agent and a solid inert carrier; relative to 1 weight part of the active ingredients, the content of the wetting agent is 5-30 weight parts, the content of the dispersing agent is 5-20 weight parts, and the content of the solid inert carrier is 10-70 weight parts.

The herbicidal compositions according to the present invention may be provided in finished form, i.e. the ingredients of the composition have been mixed; or can be provided in the form of separate preparations of each component, and can be mixed uniformly before use.

The pesticide composition provided in the embodiment of the present invention is preferably an oil suspension agent in terms of the method of using the herbicide. According to the invention, the herbicide composition is used for preventing and treating gramineous weeds, nutgrass flatsedge and broadleaf weeds of paddy field crops, has an outstanding synergistic interaction effect, greatly improves the prevention and treatment effect, can reduce the using amount of pesticides, and reduces the use cost and the environmental pollution; the quick action of preventing and removing the weeds can be improved, the effect is more quick after the herbicide composition is used, and the weeds can be prevented and removed as soon as possible; can also delay the generation of drug resistance of weeds, has wide activity spectrum and is safe to rice crops.

The herbicide composition provides a new choice for preventing and controlling weeds in paddy fields.

The invention is further illustrated by the following examples, but is not to be construed as being limited thereto.

Example 118% oil suspension of cinmethylin penoxsulam cyhalofop-butyl

The herbicide composition of the embodiment is obtained by uniformly mixing 2.9 parts by weight of cinmethylin, 4.9 parts by weight of penoxsulam, 10.2 parts by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 15 parts by weight of solvent oil, 2 parts by weight of organobentonite and 50 parts by weight of methyl oleate.

Example 218% Cytopetan penoxsulam Cyhalofop-butyl oil suspension

The herbicide composition of the embodiment is obtained by uniformly mixing 6 parts by weight of cycloheptane ether, 6 parts by weight of penoxsulam, 6 parts by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 15 parts by weight of solvent oil, 2 parts by weight of organobentonite and 50 parts by weight of methyl oleate.

Example 318% Cytopetalum penoxsulam Cyhalofop-butyl oil suspension

The herbicide composition of the embodiment is obtained by uniformly mixing 1.9 parts by weight of cinmethylin, 4.8 parts by weight of penoxsulam, 11.3 parts by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 15 parts by weight of solvent oil, 2 parts by weight of organobentonite and 50 parts by weight of methyl oleate.

Example 418% Cytopetalum penoxsulam Cyhalofop-butyl oil suspension

Taking 11.2 parts by weight of cycloheptane ether, 1.12 parts by weight of penoxsulam, 5.68 parts by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 15 parts by weight of solvent oil, 2 parts by weight of organobentonite and 50 parts by weight of methyl oleate, and uniformly mixing to obtain the herbicide composition of the embodiment.

Example 518% Cytopetan penoxsulam Cyhalofop-butyl oil suspension

0.34 part by weight of cycloheptane ether, 5.78 parts by weight of penoxsulam, 11.88 parts by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 15 parts by weight of solvent oil, 2 parts by weight of organobentonite and 50 parts by weight of methyl oleate are uniformly mixed to obtain the herbicide composition of the embodiment.

Example 618% Cytopetalum penoxsulam Cyhalofop-butyl oil suspension

Taking 17.6 parts by weight of cycloheptane ether, 0.2 part by weight of penoxsulam, 0.2 part by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 15 parts by weight of solvent oil, 2 parts by weight of organobentonite and 50 parts by weight of methyl oleate, and uniformly mixing to obtain the herbicide composition of the embodiment.

Example 718% oil suspension of cinmethylin penoxsulam cyhalofop-butyl

Taking 0.1 part by weight of cycloheptane ether, 8 parts by weight of penoxsulam, 9.5 parts by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 15 parts by weight of solvent oil, 2 parts by weight of organobentonite and 50 parts by weight of methyl oleate, and uniformly mixing to obtain the herbicide composition of the embodiment.

Example 830% Cytopetan penoxsulam Cyhalofop-butyl emulsifiable concentrate

The herbicide composition of the present embodiment is obtained by uniformly mixing 2.36 parts by weight of cinmethylin, 4 parts by weight of penoxsulam, 23.64 parts by weight of cyhalofop-butyl, 10 parts by weight of an emulsifier (styrylphenol polyoxyethylene ether), and 60 parts by weight of a solvent (5 parts by weight of methanol, 55 parts by weight of aromatic hydrocarbon solvent oil).

Example 99% Heptagon penoxsulam Cyhalofop-butyl microemulsion

1.06 parts by weight of cycloheptane ether, 4.43 parts by weight of penoxsulam, 3.51 parts by weight of cyhalofop-butyl, 15 parts by weight of emulsifier (castor oil polyoxyethylene ether), 20 parts by weight of solvent cyclohexanone, 4 parts by weight of glycol, 0.1 part by weight of organic silicon defoamer and 51.9 parts by weight of water are uniformly mixed to obtain the herbicide composition of the embodiment.

Example 1035% Cytopheniran penoxsulam Cyhalofop-butyl suspending agent

The herbicide composition of the embodiment is prepared by uniformly mixing 5 parts by weight of cycloheptane ether, 5 parts by weight of penoxsulam, 25 parts by weight of cyhalofop-butyl, 5 parts by weight of emulsifier (triphenylethylphenol polyoxyethylene ether phosphate), 1 part by weight of nekal BX, 1 part by weight of thickener magnesium aluminum silicate, 0.5 part by weight of preservative sodium benzoate, 4 parts by weight of antifreeze agent (ethylene glycol), 0.3 part by weight of organic silicon defoamer and 53.2 parts by weight of water.

Example 1144.5% Cytopetalum penoxsulam Cyhalofop-butyl Water dispersible granule

Taking 4 parts by weight of cinmethylin, 40 parts by weight of penoxsulam, 0.5 part by weight of cyhalofop-butyl, 7 parts by weight of alkyl naphthalene sulfonate, 2 parts by weight of sodium dodecyl sulfate, 10 parts by weight of sodium sulfate and 36.5 parts by weight of kaolin, uniformly mixing by using a spiral stirrer, crushing into 325 meshes by using an airflow pulverizer, and then granulating, sieving and drying to obtain the herbicide composition of the embodiment.

EXAMPLE 1255% wettable powder of cycloheptane ether, penoxsulam, cyhalofop-butyl

Taking 2.61 parts by weight of cinmethylin, 0.26 part by weight of penoxsulam, 52.13 parts by weight of cyhalofop-butyl, 8 parts by weight of lignosulfonate, 2 parts by weight of sodium dodecyl sulfate, 8 parts by weight of white carbon black and 27 parts by weight of kaolin, uniformly mixing by using a spiral stirrer, and crushing to 325 meshes by using an airflow pulverizer to obtain the herbicide composition of the embodiment. .

Comparative example 118% cinmethylin oil suspension

An 18% cycloheptane ether oil suspension was prepared using the procedure of example 1, except that: the active ingredient is 18 parts by weight of cinmethylin.

Comparative example 218% penoxsulam oil suspension

An 18% penoxsulam oil suspension was prepared using the method of example 1, except that: the active ingredient is penoxsulam in 18 weight portions.

Comparative example 318% cyhalofop-butyl oil suspending agent

An 18% cyhalofop-butyl oil suspension was prepared using the method of example 1, except that: the active ingredient is cyhalofop-butyl in 18 weight portions.

Comparative example 418% cycloheptane ether penoxsulam oil suspension

Comparative example 518% cinmethylin cyhalofop-butyl oil suspension

An 18% cycloheptane ether oil suspension was prepared using the procedure of example 1, except that: the active ingredients are 3 parts by weight of cinmethylin and 15 parts by weight of cyhalofop-butyl.

Comparative example 6

60g/L penoxsulam-cyhalofop-butyl oil suspending agent (trade name: Daoxi) which is a common product of Dow Yinong company is purchased.

Comparative example 728% oxadiazon, penoxsulam, cyhalofop-butyl oil suspending agent

A 28% cycloheptane ether oil suspension was prepared using the procedure of example 1, except that: the active ingredients comprise 13 weight parts of oxadiazon, 4.8 weight parts of penoxsulam and 10.2 weight parts of cyhalofop-butyl.

Comparative example 825% clomazone, penoxsulam, cyhalofop-butyl oil suspension

A 25% cycloheptane ether oil suspension was prepared using the procedure of example 1, except that: the active ingredients are 10 weight parts of clomazone, 4.8 weight parts of penoxsulam and 10.2 weight parts of cyhalofop-butyl.

Comparative example 918% cycloheptane ether, bispyribac-sodium cyhalofop-butyl oil suspending agent

An 18% oil suspension of cinmethylin-metamifop-cyhalofop was prepared using the method of example 1, except that: the active ingredients comprise 3 weight parts of suberin, 4.8 weight parts of metamifop and 10.2 weight parts of cyhalofop-butyl.

Comparative example 1018% cycloheptane ether-penoxsulam-bispyribac-sodium oil suspension

An 18% oil suspension of cinmethylin-penoxsulam-metamifop was prepared using the method of example 1, except that: the active ingredients are 3 weight parts of cinmethylin, 4.8 weight parts of penoxsulam and 10.2 weight parts of metamifop.

Indoor bioassay screening and field test

The invention adopts a method combining indoor biological assay and field test to prove the synergistic effect of the composition. Unless otherwise specified, the proportions (including percentages) mentioned below are mass ratios.

Test implementation 1: indoor Activity measurement test

Purpose of the experiment: the fresh weight control effect of the cinmethylin, penoxsulam, cyhalofop-butyl and different mixed compositions thereof on weeds is measured under the greenhouse potting condition, the combined action is evaluated, and scientific basis is provided for formulation development of mixed medicaments and pesticide registration field pesticide effect tests.

The test method comprises the following steps: the test is carried out under the greenhouse condition, seeds of different types of weed are sown in flowerpots, 25 seeds in each flowerpot are guaranteed, the seeds are covered with fine sand soil with the thickness of about 1cm, water is added from the bottom of the flowerpot to keep the soil moist, and the water content is 25-35%. Culturing in light incubator, spraying stem and leaf when the weed grows to 5cm after emergence of soil, repeating for 4 times for each treatment group, and controlling treatment without drug. And (4) culturing the treated test material in a greenhouse, and regularly observing the growth condition of the target weeds. After 30 days of test treatment, the damage symptoms and growth inhibition condition of the target crops are visually observed, and the fresh weight of the overground part is called.

The tested targets are three weeds of eleusine indica, special-shaped sedge and monochoria vaginalis.

Test agents: the single-dose use of the test agents prepared in comparative example 1, comparative example 2 and comparative example 3 or the use of the compounded mixtures prepared in the corresponding proportions as required (the amounts are the application amounts of the effective ingredients of the composition per mu) were selected.

The evaluation method comprises the following steps:

fresh weight inhibition (%) was calculated.

Fresh weight inhibition ratio P (%) - (control fresh weight-treated fresh weight)/control fresh weight 100

The combination of the two herbicides was evaluated for the type of combined action on weeds using the Gowing method. The theoretical control effect of the mixed herbicide is calculated according to the following formula:

E0＝X+Y(100-X)/100

in the formula, X is the fresh weight inhibition rate of the component A to the target weeds when used alone; y is the fresh weight inhibition rate of the component B to the target weeds when used alone, and E0 is the theoretical prevention effect of the component A and the component B to the target weeds when used together; e is the actual control of the target when component a and component B are mixed, and the results are shown in table 1.

The combined effect evaluation method of the three herbicides was evaluated using the following Colby equation:

E＝X+Y+Z-[(X*Y+X*Z+Y*Z)/100]-X*Y*Z/10000

in the formula, X is the fresh weight inhibition rate of the component A to the target weeds when used alone; y is the fresh weight inhibition rate of the component B to the target weeds when used alone; z is the fresh weight inhibition rate of the component C on the target weeds when used alone; e0 is the theoretical prevention effect of the fresh weight inhibition rate of the target when the component A, the component B and the component C are mixed; e is the actual control of the target when component a, component B and component C were mixed alone, with the results shown in table 1.

Evaluation criteria: synergy is indicated when E-E0> 10%, additive when E-E0 is between + -10% and antagonistic when E-E0< -10%.

Table 1: combined virulence of herbicidal compositions against three weeds (spraying)

As can be seen from the results in Table 1, when the three components of the cinquefoil, the penoxsulam and the cyhalofop-butyl are compounded, compared with the single use or the combined use of two pesticide components, the compound has very good control effect on the eleusine indica, the special-shaped sedge and the monochoria vaginalis. The weight ratio of the cinmethylin to the penoxsulam to the cyhalofop-butyl is 1: 0.01-80: has better synergistic effect within the range of 0.01-95, and particularly has the following weight percentage of 1: 3.4: 7; 1: 1.7: 3.5; 1: 0.85: 1.75; 1: 0.1: 0.5; 1: 17: 35; 1: 0.01: 0.01; 1: 80: at 95, the actually measured comprehensive control effect is obviously higher than the theoretical control effect, and the E-E0 value is between 12.3 and 32.1, which shows that the suberin, penoxsulam and cyhalofop-butyl produce obvious synergistic effect under the condition of the mixture ratio.

Test example 2:

and (3) determining the field control effect of the weeding composition on the weeds in the paddy field.

The herbicidal compositions of examples 1 to 12 and comparative examples 1 to 10 were tested in rice paddy fields for controlling superior weeds (including barnyard grass, ponyta, potamogeton and amaranthus, cyperus and water chestnut) against grassy weeds, cyperaceae and broadleaf weeds in paddy fields, respectively, and specifically included the steps of: accurately weighing various agents according to the area of a test cell in the 2-3 leaf period of the rice, diluting the agents by adding water until the spraying amount is 30L/mu, uniformly spraying by using a knapsack sprayer, and selecting a special fan-shaped sprayer for the herbicide. During spraying, the liquid medicine is required to be uniformly sprayed into a test cell, so that the phenomena of missing spraying and excessive spraying are avoided, and water is used for replacing the herbicide composition to be used as blank treatment. Except for the application of the herbicide according to the scheme, the conditions of other test plots are identical (the dosage is the application amount of the active ingredients of the composition per mu of land), the weed death condition is observed every 10 days within 30 days after the application of the herbicide after the test, and the herbicidal activity of various agents is compared. In addition, the growth of the crops was observed every 7 days within 21 days after the application to examine whether the agent is phytotoxic to the crops.

Every 10 days after application, the weeds (barnyard grass, pongamia, potamogeton sinense, amaranthus, cyperus esculentus and water chestnut) in the test treatment plot were identified and counted, and the control effect of the plants was calculated according to formula (a), with the results as shown in tables 2 to 4 below.

TABLE 2 field efficacy test results (10 days after drug administration)

TABLE 3 field test results of efficacy (20 days after drug administration)

TABLE 4 field efficacy test results (30 days after drug administration)

From the above tables 2-4, it can be seen that the ternary complex application of the cycloheptane ether, penoxsulam and cyhalofop-butyl herbicide composition can achieve excellent weeding effect with a lower application amount of the composition, obviously improve the control level of the composition on gramineae, broadleaf weeds and cyperaceae of paddy fields, have an outstanding synergistic effect, can achieve a more obvious synergistic effect compared with other components or compositions, and has a small pesticide dosage, so that the use cost and the environmental pollution are reduced; meanwhile, the herbicide composition has quick weeding effect after application, quickly improves the action of weeding activity, improves the condition that weeds and rice compete for nutrients as early as possible, and ensures the normal growth of the rice.

In conclusion, the herbicide composition disclosed by the invention further improves the control effect on weeds in a paddy field, reduces the dosage and expands the weeding spectrum, and most importantly, the herbicide composition has a quick weeding effect after application, can quickly act on a target within 10 days after application, obviously improves the weeding activity, shortens the weeding time, ensures the fertility of the paddy field, reduces the nutrient consumption of the paddy field, and enables the paddy to normally grow.

Preferred embodiments of the present invention have been described above, but the present invention is not limited to the specific details in the above embodiments. The technical scheme of the invention can be combined and improved in a plurality of suitable modes on the premise of no contradiction. These modifications are also included in the scope of the present invention when they fall within the technical spirit of the present invention.

Claims

1. A weeding composition comprises cinmethylin, penoxsulam and cyhalofop-butyl, and is characterized in that the weight ratio of the cinmethylin to the penoxsulam to the cyhalofop-butyl is 1: 0.01-80: 0.01-95.

2. A herbicidal composition according to claim 1, characterized in that the weight ratio of cinmethylin to penoxsulam, cyhalofop-butyl is 1: 0.1-17: 0.5-35.

3. A herbicidal composition according to claim 2, characterized in that the weight ratio of cinmethylin to penoxsulam, cyhalofop-butyl is 1: 1-2.5: 1-6.

4. A herbicidal formulation comprising a composition according to claims 1 to 3 and a suitable pesticidal adjuvant.

5. The formulation of claim 4, in a suitable dosage form.

6. The formulation of claim 5, wherein the formulation is one of oil suspension, microemulsion, wettable powder, emulsifiable concentrate, aqueous solution, microcapsule suspension, aqueous emulsion, granule and water dispersible granule.

7. A formulation according to any one of claims 4 to 6, wherein the herbicidal active ingredient comprises from 1% to 95%, preferably from 5% to 60% by weight of the total formulation.

8. Use of a composition or formulation according to the preceding claims for controlling weeds in paddy fields.

9. Use according to claim 8, characterized in that the paddy field weeds are post-emergence field weeds, preferably for the control of grasses and annual sedges and broadleaf weeds.

10. The use of claim 9, wherein the grassy weeds, annual sedges and broadleaf weeds are at least one of barnyard grass, pongamia, potamogeton and amaranthus, cyperus and water chestnut.