CN113519545A - Thiamethoxam microcapsule seed treatment suspending agent and application thereof - Google Patents
Thiamethoxam microcapsule seed treatment suspending agent and application thereof Download PDFInfo
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- CN113519545A CN113519545A CN202110802348.2A CN202110802348A CN113519545A CN 113519545 A CN113519545 A CN 113519545A CN 202110802348 A CN202110802348 A CN 202110802348A CN 113519545 A CN113519545 A CN 113519545A
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- thiamethoxam
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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
- A01N51/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring
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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
- 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
- A01N25/26—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 in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
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- Pest Control & Pesticides (AREA)
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Abstract
The invention belongs to the technical field of pesticide preparations, and particularly relates to a thiamethoxam microcapsule seed treatment suspending agent and application thereof. The thiamethoxam microcapsule seed treatment suspending agent comprises, by weight, 5-50% of thiamethoxam microcapsules, 1-10% of sodium lignosulfonate, 1-10% of styrene maleic anhydride polycondensate, 1-10% of agricultural emulsion 1601#1, 1-8% of polyvinyl alcohol, 1-5% of xanthan gum, 1-5% of organic silicon, 1-5% of ethylene glycol and the balance of deionized water to 100%. The microcapsule seed treatment suspending agent can be used for preventing and treating corn aphids.
Description
Technical Field
The invention belongs to the technical field of pesticide preparations, and particularly relates to a thiamethoxam microcapsule seed treatment suspending agent and application thereof.
Background
The chemical pesticide can prevent and control insect pests and plant diseases, control the flooding of rats, inhibit the multiplication of weeds and play an important role in agricultural production. Under the circumstances of the decades of mankind's manfold increase in the world's population, pesticides make an unmortal contribution to the guarantee of human food supply. However, the problem of environmental pollution is also accompanied when chemical pesticides are used in large quantities. According to statistics, only 10% -20% of applied pesticides reach the surface of plants, but the pesticides directly reach the surface of plants to play a substantial role, and a large amount of pesticides are released into the environment to pollute the atmosphere, soil, lakes, rivers and the like in the environment; in addition, pesticide residues in crops are even more of a non-negligible potential threat, which is directly threatening the health of human beings. In order to reduce the pollution of pesticide to the environment and the threat to human beings, in recent years, researchers do a lot of work, such as precise pesticide application, target pesticide application and development of an electrostatic spraying technology, so that the sprayed pesticide is accurately attached to a target, and the release of the pesticide in the environment is reduced; researching and developing the environment-friendly pesticide with high efficiency, low toxicity and low residue; improving the preparation, improving the drug effect, compressing organic matters harmful to the environment in the preparation, hydrating the liquid pesticide and granulating the solid pesticide pills; the slow release technology is developed, so that the crop protection period is longer by one-time application, and the application frequency is reduced.
The seed coating technology is an accurate pesticide application technology with low cost. It makes the pesticide adhere to the plant seed, and can effectively inhibit and control the internal and external germs of the seed, protect the seed and seedling from the invasion of pests and germs in the soil, control the weeds in the field, and regulate the growth of the crop. Because the seed coating technology is concealed pesticide application and has high targeting property, the dosage is greatly reduced, and the pollution of pesticide to the atmosphere and the soil ecological environment is reduced. Compared with furrow application, the seed treatment is applied by less than 15 percent; compared with foliage spraying, the seed treatment drug is less than 1 percent. After the seeds are coated, the purposes of preventing and curing diseases and insects can be achieved, and the coated seeds have various effects of promoting growth and development, enhancing stress resistance of the seeds and the like. In addition, the interval from seed coating to seed picking is long, the pesticide can be degraded in the plant body or in the environment, and the pesticide residue of crops can be reduced. Therefore, the seed coating technique is a technique to be extensively studied and popularized.
From the crops, most of effective components are treated by seeds, which easily causes plant phytotoxicity to a certain degree, so that the dosage of the effective components directly acting on the seeds is limited, therefore, under the general condition, the effective components are used for treating the seeds, the phytotoxicity is preferably reduced, pests can be controlled for a long time, the slow release preparation can solve the two problems, the slow release preparation is a novel field which is developed vigorously, two categories of physical slow release preparations and chemical slow release preparations exist at present, the microcapsule slow release preparation can not only reduce the phytotoxicity, but also prolong the duration, and better application safety and lower application rate can be achieved.
Disclosure of Invention
The invention relates to a thiamethoxam microcapsule seed treatment suspending agent and application thereof, and the specific technical scheme is as follows:
the thiamethoxam microcapsule seed treatment suspending agent comprises, by weight, 5-50% of thiamethoxam microcapsules, 1-10% of sodium lignosulfonate, 1-10% of styrene maleic anhydride polycondensate, 1-10% of agricultural emulsion 1601#1, 1-8% of polyvinyl alcohol, 1-5% of xanthan gum, 1-5% of organic silicon, 1-5% of ethylene glycol and the balance of deionized water to 100%.
Preferably, the thiamethoxam microcapsule comprises 10-40% of thiamethoxam microcapsule, 1-8% of sodium lignosulfonate, 1-8% of styrene maleic anhydride polycondensate, 1-8% of agricultural milk 1601#1, 1-5% of polyvinyl alcohol, 1-5% of xanthan gum, 1-4% of organosilicon, 1-4% of ethylene glycol and deionized water to make up 100%.
The preparation method of the thiamethoxam microcapsule comprises the following steps: dissolving thiamethoxam raw material and polymer wall material in dichloromethane to form an organic phase; adding emulsifier polyvinyl alcohol into water to form a water phase; mixing the organic phase and the water phase, stirring and mixing at high speed by a shearing machine, and then electromagnetically stirring at room temperature until the organic solvent is completely volatilized, thus obtaining the organic solvent.
The polymer wall material is carboxymethyl cellulose, ethyl cellulose or butyl cellulose.
Preferably, the polymer wall material is carboxymethyl cellulose.
An application of a thiamethoxam microcapsule seed treatment suspending agent in preventing and treating corn pests.
Preferably, the pests are aphids.
Compared with the prior art, the invention has the following beneficial effects:
1. the microcapsule prepared by taking carboxymethyl cellulose as a wall material has smaller grain diameter, and the grain diameter range is 0.5-3 mu m; the coating rate is the highest, and is 96.28 percent;
2. the suspending agent for treating the thiamethoxam microcapsule seeds, which is prepared by the invention, has an excellent control effect on corn aphids, is long in lasting period and safe to corns.
Drawings
FIG. 1 is a photomicrograph (400 times, capsule wall material carboxymethyl cellulose) of the thiamethoxam microcapsule shown in FIG. 1.
Detailed Description
The invention will be better understood from the following examples. However, those skilled in the art will readily appreciate that the description of the embodiments is only for illustrating the present invention and should not be taken as limiting the invention as detailed in the claims.
Example 1: preparation of thiamethoxam microcapsule
The preparation method comprises the following steps: the capsule is prepared by oil-in-water emulsification-solvent volatilization method. Dissolving 1g of thiamethoxam technical material and 4.5g of polymer wall material (carboxymethyl cellulose, ethyl cellulose or butyl cellulose) in 100ml of dichloromethane to form an organic phase; the emulsifier polyvinyl alcohol was added to water to form 400ml of a 0.5% polyvinyl alcohol aqueous phase. Mixing the organic phase and the water phase, stirring and mixing for 4min at high speed by a shearing machine, and then electromagnetically stirring at room temperature until the organic solvent is completely volatilized, thus obtaining the organic solvent.
Example 2: microcapsule particle size measurement and particle size distribution
The test method comprises the following steps: the microcapsule preparation was washed with distilled water, concentrated 2-fold, dispersed on a glass slide, air-dried, and observed with a microscope. Diluting the microcapsule preparation with distilled water, and measuring the particle size and distribution of the microcapsule preparation with laser particle sizer
And (3) testing results: the data measured by the laser particle size analyzer show that the influence of the wall material on the particle size of the microcapsule is larger under the same preparation condition. The microcapsule prepared by taking the butyl cellulose as the wall material has larger grain diameter within the range of 1-12 mu m, and the microcapsule prepared by taking the carboxymethyl cellulose as the wall material has smaller grain diameter within the range of 0.5-3 mu m. From table 1 comparing the average particle diameters of microcapsules of various wall materials, it can be seen that the average particle diameter of the butyl cellulose microcapsule is the largest, the average particle diameter of the carboxymethyl cellulose microcapsule is the smallest, and the difference between the particle diameters of the two wall materials of carboxymethyl cellulose and ethyl cellulose is not large.
The shape and appearance of the microcapsule particles are shown in figure 1, and the thiamethoxam microcapsule is a regular sphere with good dispersibility and uniform size.
TABLE 1 microcapsule particle size of different wall materials
| Capsule wall material | Carboxymethyl cellulose | Ethyl cellulose | Butyl cellulose |
| Average particle diameter μm | 1.44 | 1.83 | 5.94 |
Example 3: coating ratio of microcapsules
The determination method comprises the following steps: weighing 0.5g of thiamethoxam microcapsule, adding methanol for dissolving, performing ultrasonic dispersion, fixing the volume, filtering by 0.45 mu m, and measuring by using a high performance liquid chromatograph.
And (3) measuring results: under the same preparation conditions, the wall material has certain influence on the coating rate of the thiamethoxam. As can be seen from table 2, the microcapsules prepared using carboxymethyl cellulose as the wall material had the highest coating rate, and those prepared using ethyl cellulose or butyl cellulose as the wall material had a close coating rate.
TABLE 2 coating rates of different wall materials
| Capsule wall material | Carboxymethyl cellulose | Ethyl cellulose | Butyl cellulose |
| Coating rate% | 96.28 | 90.15 | 89.30 |
Example 4: thiamethoxam microcapsule seed treatment suspending agent
Formula 1: 15% thiamethoxam microcapsule seed treatment suspending agent
15% of thiamethoxam microcapsule, 5% of sodium lignosulfonate, 4% of styrene maleic anhydride polycondensate, 1601# 3% of agricultural emulsion, 4% of polyvinyl alcohol, 2% of xanthan gum, 2% of organic silicon, 1.5% of ethylene glycol and deionized water for making up 100%.
The preparation method comprises the following steps: dissolving thiamethoxam technical and carboxymethyl cellulose in dichloromethane to form an organic phase; the emulsifier polyvinyl alcohol is added to the water to form an aqueous phase. Mixing the organic phase and the water phase, stirring and mixing for 4min at a high speed by using a shearing machine, then electromagnetically stirring at room temperature until the organic solvent is completely volatilized, and adding a dispersing agent, an emulsifying agent, a film-forming agent, a defoaming agent and a proper amount of water to prepare the microcapsule seed treatment suspending agent.
And (2) formula: 20% thiamethoxam microcapsule seed treatment suspending agent
20% of thiamethoxam microcapsule, 4% of sodium lignosulfonate, 6% of styrene maleic anhydride polycondensate, 1601# 2% of agricultural emulsion, 5% of polyvinyl alcohol, 3% of xanthan gum, 2.5% of organic silicon, 2% of ethylene glycol and deionized water, wherein the balance is 100%. (preparation methods are as above)
And (3) formula: 25% thiamethoxam microcapsule seed treatment suspending agent
25% of thiamethoxam microcapsule, 5% of sodium lignosulfonate, 2% of styrene maleic anhydride polycondensate, 1601# 3% of agricultural emulsion, 6% of polyvinyl alcohol, 3% of xanthan gum, 3% of organic silicon, 2% of ethylene glycol and deionized water for making up 100%. (preparation methods are as above)
Comparison 1: carboxymethyl cellulose was replaced with ethyl cellulose in formulation 1.
Comparison 2: carboxymethyl cellulose was replaced with butyl cellulose in formulation 1.
Example 5: pesticide effect test of thiamethoxam microcapsule seed treatment suspending agent on corn emergence rate and aphids
The test method comprises the following steps: and calculating the dosage of the medicament required by each treatment according to the area and dosage of the cell. Before sowing, the prepared liquid medicine is fully stirred and mixed with the seeds, and the liquid medicine is uniformly distributed on the seeds and is spread out for airing. The sowing was completed three times in the same day for each treatment. No agents for controlling corn aphids were used during the test.
The investigation method comprises the following steps: and (5) surveying the emergence situation 25d after the corn is sowed, randomly selecting 5 points of corns per cell, surveying the number of the emergence of the corns per point by 100 holes, and calculating the emergence rate. In the initial stage of corn emasculation and the initial stage of aphid prosperity, randomly taking 5 points in each plot, 20 plants in each point, investigating the quantity of aphids for the first time, and calculating the control effect; and (5) carrying out 2 nd investigation on the corn emasculation and flowering period, and calculating the control effect.
TABLE 3 pharmacodynamic test of thiamethoxam microcapsule seed treatment suspending agent on corn emergence rate and aphids
As can be seen from Table 3, the thiamethoxam microcapsule seed treatment suspending agent prepared by the invention has excellent control effect on corn aphids, has long lasting period and is safe to corn.
The above description is only a preferred embodiment of the present invention, and it is obvious to those skilled in the art that modifications may be made without departing from the scope of the present invention, and such modifications are also within the scope of the present invention.
Claims (7)
1. The thiamethoxam microcapsule seed treatment suspending agent is characterized in that: the composition comprises, by weight, 5-50% of thiamethoxam microcapsules, 1-10% of sodium lignosulfonate, 1-10% of styrene maleic anhydride polycondensate, 1-10% of agricultural emulsion 1601#1, 1-8% of polyvinyl alcohol, 1-5% of xanthan gum, 1-5% of organosilicon, 1-5% of ethylene glycol and the balance of deionized water to 100%.
2. The thiamethoxam microcapsule seed treatment suspending agent according to claim 1, wherein the preparation method of the thiamethoxam microcapsule comprises the following steps: dissolving thiamethoxam raw material and polymer wall material in dichloromethane to form an organic phase; adding emulsifier polyvinyl alcohol into water to form a water phase; mixing the organic phase and the water phase, stirring and mixing at high speed by a shearing machine, and then electromagnetically stirring at room temperature until the organic solvent is completely volatilized, thus obtaining the organic solvent.
3. The thiamethoxam microcapsule seed treatment suspension according to claim 2, wherein: the polymer wall material is carboxymethyl cellulose, ethyl cellulose or butyl cellulose.
4. The thiamethoxam microcapsule seed treatment suspension according to claim 3, wherein: the polymer wall material is carboxymethyl cellulose.
5. A thiamethoxam microcapsule seed treatment suspension according to any one of claims 1 to 4, wherein: 10-40% of thiamethoxam microcapsule, 1-8% of sodium lignosulfonate, 1-8% of styrene maleic anhydride polycondensate, 1-8% of agricultural emulsion 1601# 1-8%, 1-5% of polyvinyl alcohol, 1-5% of xanthan gum, 1-4% of organosilicon, 1-4% of ethylene glycol and deionized water for making up 100%.
6. Use of a thiamethoxam microcapsule seed treatment suspension according to any one of claims 1 to 5 for controlling corn pests.
7. Use according to claim 7, characterized in that said pests are aphids.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115152783A (en) * | 2022-08-24 | 2022-10-11 | 中国农业科学院农业环境与可持续发展研究所 | Thiamethoxam nano microcapsule suspending agent and preparation method thereof |
| CN117158419A (en) * | 2023-11-02 | 2023-12-05 | 山东润禧生物科技有限公司 | Cyhalothrin thiamethoxam microcapsule suspension and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115152783A (en) * | 2022-08-24 | 2022-10-11 | 中国农业科学院农业环境与可持续发展研究所 | Thiamethoxam nano microcapsule suspending agent and preparation method thereof |
| CN117158419A (en) * | 2023-11-02 | 2023-12-05 | 山东润禧生物科技有限公司 | Cyhalothrin thiamethoxam microcapsule suspension and preparation method thereof |
| CN117158419B (en) * | 2023-11-02 | 2024-02-06 | 山东润禧生物科技有限公司 | Cyhalothrin thiamethoxam microcapsule suspension and preparation method thereof |
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