CN112075439A - Weeding composition and application thereof - Google Patents
Weeding composition and application thereof Download PDFInfo
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- CN112075439A CN112075439A CN202011003793.4A CN202011003793A CN112075439A CN 112075439 A CN112075439 A CN 112075439A CN 202011003793 A CN202011003793 A CN 202011003793A CN 112075439 A CN112075439 A CN 112075439A
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- CN
- China
- Prior art keywords
- agent
- terbuthylazine
- isoxaflutole
- polyoxyethylene ether
- weeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
- A01N43/66—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms
- A01N43/68—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms with two or three nitrogen atoms directly attached to ring carbon atoms
- A01N43/70—Diamino—1,3,5—triazines with only one oxygen, sulfur or halogen atom or only one cyano, thiocyano (—SCN), cyanato (—OCN) or azido (—N3) group directly attached to a ring carbon atom
Abstract
The invention relates to the technical field of pesticides, and particularly relates to a weeding composition and application thereof. A weeding composition comprises isoxaflutole and terbuthylazine in a weight ratio of 1: (0.1-150). The weeding composition provided by the invention is environment-friendly, has no harm to crops and has no influence on next-stubble crops, the two herbicides with different weeding mechanisms act on weeds together to generate a synergistic effect, the dosage is reduced, the weeding spectrum is expanded, the control effect is improved, the defect of poor control effect of a single medicament on main weeds is overcome, the weeding effect is obvious, and particularly, the weeding effect on piemarker, goosefoots, green bristlegrass and crabgrass is excellent. In addition, the prepared dispersible oil suspending agent has a synergistic effect among the raw materials, has good emulsifying dispersibility and storage stability, has good spreading permeability on the surface of crops when in use, reduces the loss of effective components, and has obvious synergistic effect, thereby improving the medicinal effect of the herbicide.
Description
Technical Field
The invention relates to the technical field of pesticides, and particularly relates to a weeding composition and application thereof.
Background
The pesticide has a very main effect on the planting industry, and the development of the pesticide has high efficiency, low toxicity, low residue and no pollution. Therefore, in the selection of the pesticide, the pesticide of the compound mixture naturally becomes an effective way of preferential selection at present, and the performance is complemented by adjusting the proportion among the pesticides, so that the pesticide obtains the best synergy. The herbicide plays a great role in protecting crops from weeds, promoting the growth of crops, improving the quality of agricultural products and the like, has been rapidly developed into an important means for agricultural weeding, and is rapidly popularized and applied in production. However, the herbicide is a pair of sword, and during the use process, the herbicide can also cause negative effects such as phytotoxicity and the like to crops due to the characteristics and processing quality problems of the herbicide, lagging use technology of users, poor environmental conditions and the like. The dispersible oil suspending agent is a liquid preparation with active ingredients stably suspended in liquid incompatible with water, and is used by diluting with water and spraying weeds. The pesticide dispersible oil suspending agent has the advantages of safety, environmental protection, good pesticide effect, good adhesiveness, strong spreadability, strong rain erosion resistance and the like, and becomes a hotspot for the development of pesticide formulations in the last 10 years.
The herbicide suspending agent is prepared from the herbicide raw material, the oil dispersing medium is used, and the oil dispersing medium is suitable for adding the oil-based system auxiliary agent, so that the capability of the liquid medicine for penetrating a wax layer and a cuticle of a leaf surface can be improved, the liquid medicine can enter tissues in leaves more smoothly, and meanwhile, the oil-based system is favorable for improving the deposition capability, the rain wash resistance and the transpiration resistance of the agent, and the effects can promote the drug effect to be exerted, so that an obvious synergistic effect is achieved. The problems that the dispersible oil suspending agent is influenced by various factors, the original medicine is decomposed, the emulsibility is poor and the like are solved, so that the drug effect is finally influenced, the decomposition and the sedimentation of the effective components are prevented, the stability of the effective components in the storage and transportation process is kept, and the improvement of the emulsifying property of the dispersible oil suspending agent in water is a difficult point for the research in the technical field of pesticides.
The invention provides a weeding composition containing isoxaflutole and terbuthylazine, which has obvious weeding effect, is environment-friendly, safe to crops and has no influence on next-stubble crops; the prepared dispersible oil suspending agent has good emulsifying dispersibility and storage stability, has obvious synergistic effect and improves the weeding effect of the composition.
Disclosure of Invention
In order to solve the above technical problems, a first aspect of the present invention provides a herbicidal composition comprising isoxaflutole and terbuthylazine.
As a preferred technical scheme of the invention, the weight ratio of isoxaflutole to terbuthylazine is 1: (0.1-150).
As a preferred technical scheme of the invention, the weight ratio of isoxaflutole to terbuthylazine is 1: 8.
as a preferable technical scheme, the formulation of the weeding composition is selected from one of dispersible oil suspending agent and suspoemulsion.
The second aspect of the invention provides a dispersible oil suspending agent, which is prepared from the raw materials of the weeding composition, a dispersion medium and an auxiliary agent; the auxiliary agent comprises at least one of a dispersing agent, an emulsifying agent, a wetting agent, a thickening agent, an antifreezing agent, a preservative, a stabilizing agent and a defoaming agent.
As a preferable technical scheme of the invention, the raw materials for preparing the dispersible oil suspending agent at least comprise the following components in percentage by weight: 20-40% of weeding composition, 1-5% of dispersant, 10-25% of emulsifier, 0.01-5% of wetting agent, 0.01-3% of thickening agent, 1-10% of antifreeze and the balance of dispersion medium to 100%.
As a preferable technical solution of the present invention, the emulsifier is at least one selected from styrylphenol polyoxyethylene ether or a phosphate thereof, fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether, polyoxyethylene sorbitan stearate, dibenzyl diphenol polyoxyethylene ether, castor oil polyoxyethylene ether, nonylphenol polyoxyethylene ether or a phosphate thereof, and a triphenethyl phenol polyoxypropylene polyoxyethylene front-stage polymer.
As a preferable technical scheme of the invention, the emulsifier is a mixture of polyoxyethylene sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether and tristyrylphenol polyoxypropylene polyoxyethylene front-stage polymer.
In a preferred embodiment of the present invention, the wetting agent is at least one selected from the group consisting of alkyl phenol polyoxyethylene ether formaldehyde condensate sulfate, lauryl sulfate, alkyl phenol polyoxyethylene ether phosphate, phenethyl phenol polyoxyethylene ether phosphate, fatty alcohol ethoxylate, alkyl sulfate, alkyl sulfonate, and naphthalene sulfonate.
The second aspect of the present invention provides a method for preparing the dispersible oil suspension, comprising the steps of: mixing the weeding composition, the auxiliary agent and the dispersion medium, shearing and grinding to obtain the weeding composition.
Advantageous effects
The invention provides a weeding composition, which comprises isoxaflutole and terbuthylazine, is environment-friendly, has no harm to crops and has no influence on next-stubble crops, two herbicides with different weeding mechanisms act on weeds together to generate a synergistic effect, the dosage is reduced, the weed control spectrum is expanded, the control effect is improved, the defect of poor control effect of a single herbicide on main weeds is overcome, the weeding effect is obvious, and particularly, the weeding effect on abutilon, goosefoots, green bristlegrass and crabgrass is excellent. In addition, the dispersible oil suspending agent prepared from the weeding composition has a synergistic effect among raw materials, has better emulsifying dispersibility and storage stability, has good permeability on the surface of crops during use, reduces the loss of effective components, and has obvious synergistic effect, so that the medicinal effect of the herbicide is improved; and the production process has no dust pollution, and uses no inflammable and explosive organic solvent, so that the method is safe for producers and users, convenient and safe for storage and transportation, and safe for environment.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In a first aspect of the present invention there is provided a herbicidal composition comprising isoxaflutole and terbuthylazine.
In a preferred embodiment, the weight ratio of isoxaflutole to terbuthylazine is 1: (0.1-150).
In a more preferred embodiment, the weight ratio of isoxaflutole to terbuthylazine is 1: 8.
in the research process, the inventor finds that through reasonable compounding of isoxaflutole and terbuthylazine, particularly when the weight ratio of isoxaflutole to terbuthylazine is 1: (0.1-150), the herbicide composition has obvious synergistic effect, enlarges the weed control spectrum, makes up the defect of poor effect of single medicament on preventing main weeds, improves the prevention effect, has obvious weeding effect, has more excellent weeding effect on piemarker, goosefoots, green bristlegrass and crabgrass, is environment-friendly, is safe to crops and has no influence on next-stubble crops. The inventors believe that a possible reason is that isoxaflutole, an organic heterocyclic selective systemic pre-emergence herbicide, acts primarily via weed rootlet uptake and transduction, by inhibiting p-hydroxyacetone dioxygenase, disrupting chlorophyll formation, resulting in chlorosis and wilting of the affected weeds. Terbuthylazine is a triazine herbicide, which acts by inhibiting photosynthesis of plants through a photosynthesis system I (PSII) by using D1 protein as an action target, can be used for preventing and removing most weeds, and can be applied before and after germination. The invention expands the weed control spectrum, improves the control effect, has obvious weed control effect and more excellent weed control effect on abutilon, quinoa, green bristlegrass and crab grass by reasonably compounding the isoxaflutole and the terbuthylazine.
In the invention, the dosage form of the herbicidal composition is selected from one of dispersible oil suspending agent and suspoemulsion.
The second aspect of the invention provides a dispersible oil suspending agent, which is prepared from the raw materials of the weeding composition, a dispersion medium and an auxiliary agent; the auxiliary agent comprises at least one of a dispersing agent, an emulsifying agent, a wetting agent, a thickening agent, an antifreezing agent, a preservative, a stabilizing agent and a defoaming agent.
In a preferred embodiment, the dispersible oil suspending agent is prepared from raw materials comprising, by weight: 20-40% of weeding composition, 1-5% of dispersant, 10-25% of emulsifier, 0.01-5% of wetting agent, 0.01-3% of thickening agent, 1-10% of antifreeze and the balance of dispersion medium to 100%.
In a more preferred embodiment, the dispersible oil suspending agent is prepared from at least the following raw materials in percentage by weight: 27% of weeding composition, 3% of dispersing agent, 14% of emulsifier, 1% of wetting agent, 0.8% of thickening agent, 5% of antifreezing agent and the balance of dispersing medium to 100%.
Dispersing agent
In the present invention, the dispersant is not particularly limited.
In a preferred embodiment, as the dispersant, there may be mentioned polycarboxylate, lignosulfonate, alkylnaphthalenesulfonate and the like.
In a more preferred embodiment, the dispersant is a polycarboxylate; sodium polycarboxylates are preferred.
The inventor finds that in the research process, the polycarboxylate is used as the dispersing agent in the system, so that the solid technical particles can be stably and uniformly dispersed in an oil dispersing medium for a long time, and the problems of flocculation, large particle size, storage caking and the like of a sample are prevented; meanwhile, the polycarboxylate in the system can also improve the long-term storage stability of the dispersible oil suspending agent.
Emulsifier
In the invention, the emulsifier is selected from at least one of styryl phenol polyoxyethylene ether or phosphate thereof, fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether, polyoxyethylene sorbitan stearate, dibenzyl diphenol polyoxyethylene ether, castor oil polyoxyethylene ether, nonylphenol polyoxyethylene ether or phosphate thereof, and triphenethyl phenol polyoxypropylene polyoxyethylene front-stage polymer.
In a preferred embodiment, the emulsifier is a mixture of polyoxyethylene sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether and tristyrylphenol polyoxypropylene polyoxyethylene front-end polymer.
In a more preferred embodiment, the weight ratio of polyoxyethylene sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether and tristyrylphenol polyoxypropylene polyoxyethylene front-end polymer is (1-5): (1-5): 1.
in a most preferred embodiment, the weight ratio of polyoxyethylene sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether and tristyrylphenol polyoxypropylene polyoxyethylene front-end polymer is 3: 3: 1.
in the research process, the inventor finds that if the emulsifier is unstable in an oily dispersion medium and is easy to separate out and precipitate to the bottom after being placed for a long time, particularly when the temperature changes, the emulsification effect of the dispersible oil suspending agent in water is seriously influenced, and the drug effect is further influenced. In the system, polyoxyethylene sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether and tristyrylphenol polyoxypropylene polyoxyethylene front-stage polymer are reasonably compounded, so that the system has excellent emulsification effect, and when the proportion is (1-5): (1-5): 1, the problem of precipitation and sedimentation of the emulsifier can be well avoided. The inventor thinks that the possible reason is that after the polyoxyethylene sorbitan stearate, the alkylphenol formaldehyde resin polyoxyethylene ether and the tristyrylphenol polyoxypropylene polyoxyethylene front-stage polymer are compounded, the compound has better stability in an oily dispersion medium, has a certain effect on maintaining the stability of the preparation, can ensure that solid particles are dispersed in an oil phase more stably, and reduces the oil precipitation during the storage of the preparation; in addition, the oily preparation can be fully emulsified when being used for water, a good secondary dispersion system is formed, application is facilitated, the adhesion, wetting, spreading, permeation and other properties of the liquid medicine on the plant leaf surfaces are improved, and the preparation plays an important role in ensuring the efficacy of the liquid medicine.
Wetting agent
In the present invention, the wetting agent is at least one selected from the group consisting of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, lauryl sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, fatty alcohol ethoxylate, alkyl sulfate, alkyl sulfonate, and naphthalene sulfonate.
In a preferred embodiment, the wetting agent is an alkyl sulfonate, preferably sodium alkyl sulfonate.
The inventor finds that the alkyl sulfonate is selected in the system to cooperate with the polycarboxylate dispersant, so that the interface energy of the original drug particles can be reduced, a diffusion double electric layer is formed around the particles to provide electrostatic repulsion, and the particles can be adsorbed on the surfaces of the particles to generate steric hindrance to synergistically inhibit aggregation among the original drug particles; in addition, the emulsifier and the emulsifier can generate a synergistic effect, so that the particle sedimentation rate is remarkably slowed down, and the storage stability is improved. The inventor also unexpectedly finds that the compound use of the alkyl sulfonate and the polycarboxylate is beneficial to improving the grinding efficiency, reducing the particle size of particles and preventing the particle size of solid particles from growing up when a sample is stored.
Thickening agent
In the present invention, the thickener is not particularly limited.
In a preferred embodiment, white carbon, polyvinyl alcohol, organobentonite, magnesium aluminum silicate, and the like can be mentioned.
In a more preferred embodiment, the thickener is an organobentonite.
In the present invention, the source of the organobentonite is not particularly limited, and commercially available ones are suitable for the present invention.
The inventors found during the course of the experiment that the settling rate of the bulk drug particles in an oily dispersion medium was faster than the settling rate in water. In the system, the organic bentonite is used as a thickening agent, so that the viscosity and the fluid property of the system can be improved, the sedimentation of original drug particles can be delayed, the physical stability of the system can be improved, and the organic bentonite, the emulsifying agent, the dispersing agent and the wetting agent can generate a synergistic interaction effect, so that the problems of easy oil precipitation, pseudoplasticity, poor emulsifying effect, sticky thermal storage and the like of the system are avoided.
Antifreezing agent
In the present invention, the antifreezing agent is not particularly limited, and ethylene glycol, propylene glycol, glycerin, urea, inorganic salts, and the like can be mentioned.
In a preferred embodiment, the antifreeze agent is ethylene glycol.
The inventor finds that the glycol in the system not only can improve the antifreezing effect of the system, but also can remarkably improve the storage stability of the system, and avoids the problems of thickening, caking and precipitation during long-time storage, particularly during temperature change.
Dispersion medium
In the present invention, the dispersion medium is at least one selected from the group consisting of soybean oil, rapeseed oil, corn oil, methyl oleate, diesel oil, engine oil, and mineral oil.
In a preferred embodiment, the dispersion medium is corn oil.
The inventor finds that when the corn oil is adopted as the dispersing medium in the system, the compatibility and the dispersibility between the oily dispersing medium and other components can be improved, so that the storage stability of the system is improved; meanwhile, the corn oil is used as a dispersion medium, so that the permeability of the original medicine can be improved, and the medicine effect is improved.
The third aspect of the present invention provides a preparation method of the dispersible oil suspending agent, comprising the steps of: mixing the weeding composition, the auxiliary agent and the dispersion medium, shearing and grinding to obtain the weeding composition.
In a preferred embodiment, the method for preparing the dispersible oil suspension comprises the following steps: mixing the weeding composition, the dispersing agent, the emulsifying agent, the wetting agent, the thickening agent antifreezing agent and the dispersion medium, and carrying out high-speed shearing dispersion for 10-60 min; grinding with sand mill until D97 is 1-10 μm.
In a more preferred embodiment, the D97 is 3 ± 1 μm.
D97 is the corresponding particle size value when the cumulative distribution percentage from small to large in the particle size distribution reaches 97%. That is, the number of particles having a particle size of less than D97 in a powder is 97% of the total number of particles. It is commonly used to express the index of the powder coarse end particle size, and is an important indicator in powder production and application.
The inventor finds that the D97 of the control system in the system is 1-10 mu m, and the dispersibility and the storage stability of the system can be remarkably improved.
The fourth aspect of the invention provides application of the dispersible oil suspending agent in weed control.
In a preferred embodiment, the weeds may be mentioned grasses, broadleaves, cyperaceae and the like.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
Examples
Example 1
Example 1 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 3.75 g/L; the concentration of the terbuthylazine is 25 g/L.
Example 2
Example 2 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 3.75 g/L; the concentration of the terbuthylazine is 50 g/L.
Example 3
Example 3 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 3.75 g/L; the concentration of the terbuthylazine is 100 g/L.
Example 4
Example 4 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 3.75 g/L; the concentration of the terbuthylazine is 240 g/L.
Example 5
Example 5 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 3.75 g/L; the concentration of the terbuthylazine is 400 g/L.
Example 6
Example 6 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 7.5 g/L; the concentration of the terbuthylazine is 25 g/L.
Example 7
Example 7 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 7.5 g/L; the concentration of the terbuthylazine is 50 g/L.
Example 8
Example 8 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 7.5 g/L; the concentration of the terbuthylazine is 100 g/L.
Example 9
Example 9 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 7.5 g/L; the concentration of the terbuthylazine is 240 g/L.
Example 10
Example 10 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 7.5 g/L; the concentration of the terbuthylazine is 400 g/L.
Example 11
Example 11 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 15 g/L; the concentration of the terbuthylazine is 25 g/L.
Example 12
Example 12 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 15 g/L; the concentration of the terbuthylazine is 50 g/L.
Example 13
Example 13 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 15 g/L; the concentration of the terbuthylazine is 100 g/L.
Example 14
Example 14 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 15 g/L; the concentration of the terbuthylazine is 240 g/L.
Example 15
Example 15 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 15 g/L; the concentration of the terbuthylazine is 400 g/L.
Example 16
Example 16 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 30 g/L; the concentration of the terbuthylazine is 25 g/L.
Example 17
Example 17 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 30 g/L; the concentration of the terbuthylazine is 50 g/L.
Example 18
Example 18 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 30 g/L; the concentration of the terbuthylazine is 100 g/L.
Example 19
Example 19 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 30 g/L; the concentration of the terbuthylazine is 240 g/L.
Example 20
Example 20 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 30 g/L; the concentration of the terbuthylazine is 400 g/L.
Example 21
Example 21 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 60 g/L; the concentration of the terbuthylazine is 25 g/L.
Example 22
Example 22 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 60 g/L; the concentration of the terbuthylazine is 50 g/L.
Example 23
Example 23 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 60 g/L; the concentration of the terbuthylazine is 100 g/L.
Example 24
Example 24 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 60 g/L; the concentration of the terbuthylazine is 240 g/L.
Example 25
Example 25 provides an aqueous solution of a herbicidal composition comprising isoxaflutole and terbuthylazine, the concentration of isoxaflutole being 60 g/L; the concentration of the terbuthylazine is 400 g/L.
Example 26
Example 26 provides a dispersible oil suspension agent, which is prepared from at least the following raw materials in percentage by weight: 27% of weeding composition, 3% of dispersing agent, 14% of emulsifier, 1% of wetting agent, 0.8% of thickening agent, 5% of antifreezing agent and the balance of dispersing medium to 100%.
The weeding composition is a combination of isoxaflutole and terbuthylazine, and the weight ratio is 1: 8; the dispersant is polycarboxylate; the emulsifier is a combination of polyoxyethylene sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether and tristyrylphenol polyoxypropylene polyoxyethylene front-stage polymer, and the weight ratio is 3: 3: 1; the wetting agent is sodium alkyl sulfonate; the thickening agent is organic bentonite; the antifreezing agent is ethylene glycol; the dispersion medium is corn oil.
The preparation method of the dispersible oil suspending agent comprises the following steps: mixing the weeding composition, the dispersing agent, the emulsifying agent, the wetting agent, the thickening agent antifreezing agent and the dispersion medium, and shearing and dispersing at a high speed for 20 min; grinding with sand mill until D97 is 3 + -1 μm.
Example 27
Example 27 differs from example 26 in that the raw materials for preparing the dispersible oil suspension agent comprise at least the following components in percentage by weight: 20% of weeding composition, 1% of dispersing agent, 10% of emulsifier, 0.01% of wetting agent, 0.01% of thickening agent, 1% of antifreezing agent and the balance of dispersing medium to 100%.
Example 28
Example 28 differs from example 26 in that the raw materials for preparing the dispersible oil suspension agent comprise at least the following components in percentage by weight: 40% of weeding composition, 5% of dispersing agent, 25% of emulsifier, 5% of wetting agent, 3% of thickening agent, 10% of antifreezing agent and the balance of dispersing medium to 100%.
Example 28
Example 28 differs from example 26 in that the raw materials for preparing the dispersible oil suspension agent comprise at least the following components in percentage by weight: 40% of weeding composition, 25% of emulsifier, 5% of wetting agent, 3% of thickening agent, 10% of antifreezing agent and the balance of dispersion medium to 100%.
Example 29
Example 29 differs from example 26 in that the emulsifier does not comprise polyoxyethylene sorbitan stearate.
Example 30
Example 30 differs from example 26 in that the emulsifier does not comprise alkylphenol formaldehyde resin polyoxyethylene ether.
Example 31
Example 31 differs from example 26 in that the emulsifier does not comprise a tristyrylphenol polyoxypropylene polyoxyethylene front-end polymer.
Example 32
Example 32 differs from example 26 in that no wetting agent is included.
Example 33
Example 33 differs from example 26 in that no thickener is included.
Example 34
Example 34 differs from example 26 in that no anti-freeze agent is included.
Example 35
Example 35 differs from example 26 in that no dispersant is included.
Performance testing
First, testing drug effect
1. Test method
Adopting a potted soil spraying method (NY/T1155.3-2006): the method comprises the steps of filling quantitative soil in a porcelain pot with the height of 6cm and the diameter of 9cm, sowing 15-20 weed seeds to be tested in the porcelain pot, covering with fine soil with the thickness of 0.5-1 cm, watering, placing in a greenhouse for culturing for later use, carrying out soil spraying treatment after 24 hours, spraying 1mL of liquid in each pot, repeating the treatment for 4 times, and setting the treatment without a medicament as a control. And culturing the treated test material in a greenhouse, regularly observing the growth condition of the target weeds, visually observing the target damage symptoms and the growth inhibition condition after 21d, weighing the fresh weight of the overground part or the fresh weight of the plant, and evaluating the toxicity of the medicament on the target weeds by using the target growth inhibition rate or the fresh weight inhibition rate.
2. Investigation method
After the test treatment for 21d, the target damage symptoms and growth inhibition condition are visually observed, the fresh weight of the overground part is weighed, and the fresh weight inhibition rate (%) is calculated.
3. Method for evaluating combined action
The mode of action of the herbicide combinations was evaluated according to the Gowing method (NY/T1155.7-2006), which is formulated as follows:
E0＝X+Y-XY/100
in the formula, X is the fresh weight inhibition rate of the isoxaflutole to the target weeds when a certain dosage is used singly;
y is the fresh weight inhibition rate of terbuthylazine to the target weed when a certain dosage is used singly;
e is the measured value of the fresh weight inhibition rate of the isoxaflutole and terbuthylazine to the target weeds when the two medicaments are mixed;
E0is the theoretical value of the fresh weight inhibition rate of the isoxaflutole and terbuthylazine to the target weeds when being mixed.
4. Evaluation criteria: when E is0-E > -10% means additive, synergistic effect; when E is0Antagonism is indicated when E.ltoreq.10%.
5. Examples 1-25 the results of the tests on abutilon, quinoa, large crabgrass and green bristlegrass are as follows:
examples 1-25 herbicidal Effect against Abutilon, E0E is 1.11%, -0.90%, -1.76%, 0.98%, 0.73%, -3.48%, -2.60%, 0.45%, 3.78%, -1.33%, -0.28%, -0.27%, -1.53%, 2.75%, 3.03%, -3.62%, 2.78%, 2.65%, 3.94%, 3.36%, 3.20%, 2.41%, 2.48%, 1.31%, respectively; wherein the weeding composition is the combination of isoxaflutole and terbuthylazine, and the weeding effect on abutilon is the best when the concentration ratio is 30: 240.
Examples 1-25 herbicidal Effect on Chenopodium quinoa, E0-E is-0.89%, 4.34%, 4.16%, 1.55%, 2.48%, 1.27%, -0.39%, 3.37%, 1.90%, 1.97%, 0.78%, 0.74%, 4.78%, 3.16%, 3.67%, -1.42%, 3.14%, 3.41%, 4.97%, 2.39%, -1.88%, 0.19%, 3.60%, 3.08%, 2.12%, respectively; wherein the weeding composition is the combination of isoxaflutole and terbuthylazine, and the concentration ratio is 30: 240The grass-removing effect of the chenopodium quinoa is best.
Examples 1-25 herbicidal Effect on green bristlegrass, E0-E is 3.21%, 5.57%, 4.82%, -1.43%, 1.11%, 2.33%, 1.89%, 0.03%, 4.37%, 5.75%, 5.62%, 7.02%, 5.15%, 3.33%, 6.69%, 4.17%, 5.94%, 4.69%, 7.49%, 6.21%, 0.53%, 0.68%, 0.33%, -1.09%, 0.39%, respectively; wherein the weeding composition is the combination of isoxaflutole and terbuthylazine, and the weeding effect on green bristlegrass is the best when the concentration ratio is 30: 240.
Examples 1 to 25 herbicidal Effect on crab grass, E0-E is 4.59%, 6.08%, 5.50%, 4.64%, 3.71%, 3.95%, 6.60%, 6.16%, 3.29%, 5.84%, 0.82%, 1.15%, 5.89%, 4.01%, -0.36%, 5.74%, 6.37%, 5.07%, 6.88%, 3.90%, -1.29%, 0.93%, 3.48%, 0.95%, 2.97%, respectively; wherein the weeding composition is a combination of flumioxazin, acetochlor and clomazone, and the concentration ratio is 20: 420: 160 days, the weeding effect on the crabgrass is best.
Secondly, storage stability
The dispersible oil-based suspensions obtained in examples 26 to 35 were allowed to stand at normal temperature for 3 months, and their stability was observed.
And (4) judging the standard: no precipitation, sedimentation, thinning and discoloration phenomena are generated, and the color is marked as excellent; a small amount of precipitation and sedimentation, slight thinning and discoloration phenomena are marked as good; the phenomenon of serious dilution and discoloration is marked as poor.
The stability test results are shown in table 1.
Examples 26 to 35 results of stability test of dispersible oil suspending agent
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. A herbicidal composition comprising isoxaflutole and terbuthylazine.
2. A herbicidal composition according to claim 1, wherein the weight ratio of isoxaflutole to terbuthylazine is 1: (0.1-150).
3. A herbicidal composition according to claim 1, wherein the weight ratio of isoxaflutole to terbuthylazine is 1: 8.
4. the herbicidal composition as claimed in claim 1, wherein the dosage form of the herbicidal composition is selected from one of dispersible oil suspension and suspoemulsion.
5. A dispersible oil suspension agent characterized by being prepared from the herbicidal composition as claimed in any one of claims 1 to 3, a dispersion medium and an adjuvant; the auxiliary agent comprises at least one of a dispersing agent, an emulsifying agent, a wetting agent, a thickening agent, an antifreezing agent, a preservative, a stabilizing agent and a defoaming agent.
6. The dispersible oil suspension agent of claim 5, wherein the raw materials for preparing the dispersible oil suspension agent comprise at least the following components in percentage by weight: 20-40% of weeding composition, 1-5% of dispersant, 10-25% of emulsifier, 0.01-5% of wetting agent, 0.01-3% of thickening agent, 1-10% of antifreeze and the balance of dispersion medium to 100%.
7. The dispersible oil suspension of claim 5 wherein the emulsifier is selected from at least one of styrylphenol polyoxyethylene ether or its phosphate, fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether, polyoxyethylene sorbitan stearate, dibenzyl diphenol polyoxyethylene ether, castor oil polyoxyethylene ether, nonylphenol polyoxyethylene ether or its phosphate, and tristyrylphenol polyoxypropylene polyoxyethylene front-stage polymer.
8. The dispersible oil suspension of claim 7 wherein the emulsifier is a mixture of polyoxyethylene sorbitan stearate, alkylphenol formaldehyde resin polyoxyethylene ether and tristyrylphenol polyoxypropylene polyoxyethylene head-end polymer.
9. The dispersible oil suspension concentrate of claim 5, wherein the wetting agent is selected from at least one of alkyl phenol polyoxyethylene ether formaldehyde condensate sulfate, lauryl sulfate, alkyl phenol polyoxyethylene ether phosphate, phenethyl phenol polyoxyethylene ether phosphate, fatty alcohol ethoxylate, alkyl sulfate, alkyl sulfonate, and naphthalene sulfonate.
10. A method for preparing a dispersible oil suspension concentrate according to any one of claims 5-9, comprising the steps of: mixing the weeding composition, the auxiliary agent and the dispersion medium, shearing and grinding to obtain the weeding composition.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101692807A (en) * | 2009-10-20 | 2010-04-14 | 陕西上格之路生物科学有限公司 | Dispersible oil suspension agent containing cyproconazole |
| CN102036563A (en) * | 2008-05-21 | 2011-04-27 | 巴斯夫欧洲公司 | Herbicidal composition comprising glyphosate, glufosinate or their salts |
| CN105494367A (en) * | 2016-01-12 | 2016-04-20 | 南宫市荣威生物药业有限公司 | Corn field weeding suspending agent and preparation method thereof |
| CN106259368A (en) * | 2016-08-16 | 2017-01-04 | 安徽丰乐农化有限责任公司 | A kind of corn field complex weedicide containing isoxazole oxadiazon |
| CN111184004A (en) * | 2020-01-16 | 2020-05-22 | 上海明德立达生物科技有限公司 | Pesticide composition and application thereof |
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2020
- 2020-09-22 CN CN202011003793.4A patent/CN112075439A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102036563A (en) * | 2008-05-21 | 2011-04-27 | 巴斯夫欧洲公司 | Herbicidal composition comprising glyphosate, glufosinate or their salts |
| CN101692807A (en) * | 2009-10-20 | 2010-04-14 | 陕西上格之路生物科学有限公司 | Dispersible oil suspension agent containing cyproconazole |
| CN105494367A (en) * | 2016-01-12 | 2016-04-20 | 南宫市荣威生物药业有限公司 | Corn field weeding suspending agent and preparation method thereof |
| CN106259368A (en) * | 2016-08-16 | 2017-01-04 | 安徽丰乐农化有限责任公司 | A kind of corn field complex weedicide containing isoxazole oxadiazon |
| CN111184004A (en) * | 2020-01-16 | 2020-05-22 | 上海明德立达生物科技有限公司 | Pesticide composition and application thereof |
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Application publication date: 20201215 |