阅读说明：本技术 一种通过撒施用于水稻田的含啶虫脒与杀虫双的杀虫泡腾片及其制备方法和应用 (Acetamiprid and dimehypo-containing insecticidal effervescent tablet applied to paddy field by broadcasting and preparation method and application thereof ) 是由 潘小燕 刘波 董昭苹 王耀伟 于 2020-08-05 设计创作，主要内容包括：本发明提供了一种通过撒施用于水稻田的含啶虫脒与杀虫双的杀虫泡腾片,其特征在于,包括有效成分和辅料,所述有效成分为质量比为1～60∶1～60的啶虫脒和杀虫双。本发明将啶虫脒和杀虫双进行复配,有效发挥了这两者的优点,所得产品质量优异,药效好,可用于水稻田防治害虫,防效明显高于单用啶虫脒或者单用杀虫双的防效。本发明杀虫组合物能明显节约经济成本,同时还可以减少药剂在农产品和环境中的残留量,延缓害虫抗药性产生,延长药剂的使用年限,具有重要的经济意义、环保意义和生态学意义。(The invention provides an acetamiprid-and-dimehypo-containing effervescent tablet for a paddy field by broadcasting, which is characterized by comprising effective components and auxiliary materials, wherein the effective components are the acetamiprid and the dimehypo in a mass ratio of 1-60: 1-60. The acetamiprid and the dimehypo are compounded, so that the advantages of the acetamiprid and the dimehypo are effectively exerted, the obtained product has excellent quality and good pesticide effect, can be used for preventing and controlling pests in a paddy field, and has a control effect obviously higher than that of the acetamiprid or the dimehypo alone. The insecticidal composition can obviously save economic cost, can reduce the residual quantity of the pesticide in agricultural products and environment, delay the generation of pesticide resistance of pests, prolong the service life of the pesticide, and has important economic significance, environmental protection significance and ecological significance.)

1. The acetamiprid-and-dimehypo-containing effervescent tablet for the paddy field by broadcasting is characterized by comprising effective components and auxiliary materials, wherein the effective components are the acetamiprid and the dimehypo in a mass ratio of 1-60: 1-60.

2. An effervescent insecticidal tablet according to claim 1, wherein the mass ratio of acetamiprid to bisultap is 0.4-20: 1, more preferably 2-9: 1, and most preferably 5: 1.

3. An effervescent insecticidal tablet according to claim 1, wherein the content of the effective component in the effervescent insecticidal tablet is 1-60 wt%, preferably 1-40 wt%, more preferably 20-30 wt%, most preferably 25-30 wt%.

4. An effervescent insecticidal tablet according to claim 1, wherein the effervescent insecticidal tablet comprises:

1-60 wt% of active ingredients;

3 to 8 weight percent of dispersant;

1 wt% -3 wt% of wetting agent;

20 to 60 weight percent of disintegrant;

the balance of filler.

5. An effervescent insecticidal tablet according to claim 1, wherein the effervescent insecticidal tablet comprises:

25 to 30 weight percent of active ingredients;

5 wt% of a dispersant;

2 wt% of a wetting agent;

30 wt% of a disintegrant;

the balance of filler.

6. The effervescent insecticidal tablet of claim 1, wherein the dispersant is one or more of sodium methylene bis naphthalene sulfonate, sodium methylene bis methyl naphthalene sulfonate, polynaphthalene sulfonate, sodium alkylphenol sulfonate, a copolymer of sodium acrylate and propionamide, sodium polyacrylate, sodium cellulose sulfonate, sodium fatty acid methyl ester sulfonate, polycarboxylate, maleic acid-acrylic acid copolymer salt, calcium lignosulfonate, sodium lignosulfonate, polyoxyethylene-polyoxypropylene block copolymer, aryl phenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, preferably the sodium fatty acid methyl ester sulfonate and the sodium alkylphenol sulfonate are mixed according to a mass ratio of 1: 4;

the wetting agent is one or more of succinate sulfonate, dialkyl succinate sulfonate sodium salt, butyl naphthalene sulfonate sodium salt, isopropyl naphthalene sulfonate, alkyl naphthalene sulfonate sodium salt, alkyl aryl sodium sulfonate, alkoxylate, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium tetradecyl sulfate, fatty alcohol polyoxyethylene ether sodium sulfate, N-lauryl azepane-2-ketone, N-methyl taurate sodium salt, a-sulfo fatty acid methyl ester sodium salt, a-olefin sodium sulfonate, alkylphenol polyoxyethylene ether sodium sulfate, alkylphenol polyoxyethylene ether succinic acid half ester sodium sulfonate, fatty acid sulfate and fatty acid ester sulfate, and is preferably formed by mixing butyl naphthalene sulfonate sodium salt and N-lauryl azepane-2-ketone according to the mass ratio of 1: 1;

the disintegrant is composed of an acid source and an alkali source, wherein the acid source is one or more of citric acid, tartaric acid, succinic acid, adipic acid, phosphoric acid, sodium bisulfate, succinic acid, fumaric acid and malic acid, the alkali source is one or more of sodium bicarbonate, sodium carbonate, potassium bicarbonate and calcium carbonate, and the disintegrant is preferably formed by mixing citric acid and sodium carbonate according to the mass ratio of 10: 20;

the filler is one or more of kaolin, attapulgite, diatomite, bentonite, white carbon black, light calcium carbonate, corn starch, urea, talcum powder and anhydrous sodium sulfate, and is preferably corn starch.

7. An effervescent insecticidal tablet according to claim 1, wherein the effervescent tablet has a weight per tablet of 0.5 to 10.0g, preferably 2.0 to 4.0g, most preferably 3.0 g.

8. A process for the preparation of an effervescent insecticidal tablet according to any one of claims 1 to 7, comprising the steps of:

(1) mixing and crushing the active ingredients, the acid source of the disintegrating agent, part of the dispersing agent, part of the wetting agent and part of the filler, and then granulating to obtain granules A;

(2) mixing and crushing the disintegrating agent alkali source, the rest of dispersing agent, the rest of wetting agent and the rest of filler, and granulating to obtain granules B;

(3) and mixing and tabletting the granules A and the granules B to obtain the insecticidal effervescent tablet.

9. The application of the insecticidal effervescent tablet as claimed in any one of claims 1 to 7 in controlling pests in paddy fields, wherein the application mode of the insecticidal effervescent tablet is broadcast application.

10. The use as claimed in claim 9, wherein the effervescent insecticidal tablets are used for controlling plant hoppers and rice borers in paddy fields.

Technical Field

The invention belongs to the technical field of pesticides, and particularly relates to an acetamiprid and dimehypo-containing insecticidal effervescent tablet applied to a paddy field by broadcasting, and a preparation method and application thereof.

Background

Acetamiprid, english name: acetamiprid, chemical name: E-N '- [ (6-chloro-3-pyridyl) methyl ] -N ^ (2) -cyano-N' -methylacetamide. The pure product of the acetamiprid is white crystal, the melting point is 101.0-103.3 ℃, and the vapor pressure is more than 1.33 multiplied by 10 < -6 > Pa (25 ℃). KowlogP ═ 0.8(25 ℃), solubility in water of 4.2g/L (25 ℃), solubility in acetone, methanol, ethanol, dichloromethane, chloroform, acetonitrile, tetrahydrofuran, and the like. It is stable in water at pH 7, and at pH 9, it is gradually hydrolyzed at 45 deg.C and is stable in sunlight. Acetamiprid belongs to nitromethylene heterocyclic compounds, is a novel pesticide, acts on a nicotine acetylcholine receptor at a synaptic site of an insect nervous system, interferes with stimulation conduction of the insect nervous system, causes block of a nervous system channel, causes accumulation of neurotransmitter acetylcholine at the synaptic site, and accordingly leads to paralysis and eventual death of the insect. Acetamiprid is a novel broad-spectrum insecticide with a certain acaricidal activity, and the action mode of the acetamiprid is a systemic insecticide for soil, branches and leaves. The insecticidal composition is widely used for preventing and controlling aphids, plant hoppers, thrips, partial lepidoptera pests and the like on rice, particularly vegetables, fruit trees, tea leaves and other plants.

Dimehypo, english name: bisultap, chemical name: 2-dimethylamino-1, 3-sodium disulfo propane. The bisultap is a white crystal, has special odor, is easy to absorb moisture, is easy to dissolve in water, can be dissolved in 95% hot ethanol and anhydrous ethanol, and organic solvents such as methanol, dimethylformamide, dimethyl sulfoxide and the like, is slightly soluble in acetone, and is insoluble in ethyl acetate and diethyl ether; the relative density is 1.30-1.35; is stable under neutral and alkaline conditions, can be decomposed under acidic conditions, and is stable at normal temperature. The bisultap nereistoxin pesticide is a nerve toxicant, and after contacting and eating the pesticide, the insect shows slow and slow action, loses the capability of damaging crops, stops developing, softens the body of the insect, and paralysis and dies. The bisultap has strong systemic action and can be absorbed and conducted by leaves, roots and the like of crops. The pesticide composition is mainly used for preventing and treating chilo suppressalis, tryporyza incertulas, leaf roller borer and the like, and is suitable for crops such as vegetables, rice, wheat, fruit trees and the like.

The single pesticide of acetamiprid and dimehypo belongs to a broad-spectrum pesticide, can be used for preventing and killing pests in paddy fields, but has the defects of pest resistance, narrow insecticidal spectrum, large dosage and the like along with the increase of the pesticide application period, so that the cost is increased, and the environmental pressure is increased. The two components can solve the problems, but no compound product of the two components is available at present, so that the research on the compound preparation of the two components has important significance for practical application.

In addition, formulations of acetamiprid and dimehypo are mostly wettable powder and water dispersible granules at present, the formulations need to be applied in a spraying mode, the application mode is labor-consuming and time-consuming, the labor intensity is high, the utilization rate of effective components is low, the probability of direct contact of the formulations and people is increased, and the danger to application personnel is increased; the pesticide is applied in a spray form, so that the contact chance of the pesticide with natural enemies, bees and other pollinating insects is increased, and the pesticide is easy to cause indiscriminate damage to natural enemies, bees and other beneficial insects in a contact killing mode.

Disclosure of Invention

In view of the above, the technical problem to be solved by the present invention is to provide an acetamiprid-and-dimehypo-containing effervescent tablet for paddy fields by broadcasting, and a preparation method and an application thereof, wherein the acetamiprid-and-dimehypo-containing effervescent tablet provided by the present invention can be directly and manually broadcast or broadcast by unmanned planes in paddy fields, is time-saving and labor-saving, simultaneously reduces the damage to pollinating insects such as bees, and has a significant supplementary effect on powder (direct powder spraying) and spray preparations diluted with water.

The invention provides an acetamiprid-and-dimehypo-containing effervescent tablet for a paddy field by broadcasting, which comprises effective components and auxiliary materials, wherein the effective components are the acetamiprid and the dimehypo in a mass ratio of 1-60: 1-60.

Preferably, the mass ratio of the acetamiprid to the dimehypo is 0.4-20: 1, more preferably 2-9: 1, and most preferably 5: 1.

Preferably, the content of the effective components in the insecticidal effervescent tablet is 1-60 wt%, preferably 1-40 wt%, more preferably 20-30 wt%, and most preferably 25-30 wt%.

Preferably, the effervescent insecticidal tablet comprises:

1-60 wt% of active ingredients;

3 to 8 weight percent of dispersant;

1 wt% -3 wt% of wetting agent;

20 to 60 weight percent of disintegrant;

the balance of filler.

Preferably, the effervescent insecticidal tablet comprises:

25 to 30 weight percent of active ingredients;

5 wt% of a dispersant;

2 wt% of a wetting agent;

30 wt% of a disintegrant;

the balance of filler.

Preferably, the dispersing agent is one or more of sodium methylene dinaphthalene sulfonate, polynaphthalene sulfonate, sodium alkylphenol sulfonate, a copolymer of sodium acrylate and propionamide, sodium polyacrylate, sodium cellulose sulfonate, sodium fatty acid methyl ester sulfonate, polycarboxylate, maleic acid-acrylic acid copolymer salt, calcium lignin sulfonate, sodium lignin sulfonate, polyoxyethylene-polyoxypropylene block copolymer, aryl phenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, and is preferably formed by mixing the sodium fatty acid methyl ester sulfonate and the sodium alkylphenol sulfonate according to the mass ratio of 1: 4;

the wetting agent is one or more of succinate sulfonate, dialkyl succinate sulfonate sodium salt, butyl naphthalene sulfonate sodium salt, isopropyl naphthalene sulfonate, alkyl naphthalene sulfonate sodium salt, alkyl aryl sodium sulfonate, alkoxylate, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium tetradecyl sulfate, fatty alcohol polyoxyethylene ether sodium sulfate, N-lauryl azepane-2-ketone, N-methyl taurate sodium salt, a-sulfo fatty acid methyl ester sodium salt, a-olefin sodium sulfonate, alkylphenol polyoxyethylene ether sodium sulfate, alkylphenol polyoxyethylene ether succinic acid half ester sodium sulfonate, fatty acid sulfate and fatty acid ester sulfate, and is preferably formed by mixing butyl naphthalene sulfonate sodium salt and N-lauryl azepane-2-ketone according to the mass ratio of 1: 1;

the disintegrant is composed of an acid source and an alkali source, wherein the acid source is one or more of citric acid, tartaric acid, succinic acid, adipic acid, phosphoric acid, sodium bisulfate, succinic acid, fumaric acid and malic acid, the alkali source is one or more of sodium bicarbonate, sodium carbonate, potassium bicarbonate and calcium carbonate, and the disintegrant is preferably formed by mixing citric acid and sodium carbonate according to the mass ratio of 10: 20;

the filler is one or more of kaolin, attapulgite, diatomite, bentonite, white carbon black, light calcium carbonate, corn starch, urea, talcum powder and anhydrous sodium sulfate, and is preferably corn starch.

Preferably, the effervescent tablet has a weight of 0.5-10.0g, preferably 2.0-4.0g, most preferably 3.0g per tablet.

The invention also provides a preparation method of the insecticidal effervescent tablet, which comprises the following steps:

(1) mixing and crushing the active ingredients, the acid source of the disintegrating agent, part of the dispersing agent, part of the wetting agent and part of the filler, and then granulating to obtain granules A;

(2) mixing and crushing the disintegrating agent alkali source, the rest of dispersing agent, the rest of wetting agent and the rest of filler, and granulating to obtain granules B;

(3) and mixing and tabletting the granules A and the granules B to obtain the insecticidal effervescent tablet.

The invention also provides application of the insecticidal effervescent tablet in preventing and treating paddy field pests, wherein the application mode of the insecticidal effervescent tablet is broadcast application.

Preferably, the insecticidal effervescent tablet is used for preventing and controlling plant hoppers and rice stem borers in paddy fields. Compared with the prior art, the invention provides an acetamiprid-and-dimehypo-containing effervescent tablet for a paddy field by broadcasting, which is characterized by comprising effective components and auxiliary materials, wherein the effective components are the acetamiprid and the dimehypo in a mass ratio of 1-60: 1-60. The acetamiprid and the dimehypo are compounded, so that the advantages of the acetamiprid and the dimehypo are effectively exerted, the obtained product has excellent quality and good pesticide effect, can be used for preventing and controlling pests in a paddy field, and has a control effect obviously higher than that of the acetamiprid or the dimehypo alone. The insecticidal composition can obviously save economic cost, can reduce the residual quantity of the pesticide in agricultural products and environment, delay the generation of pesticide resistance of pests, prolong the service life of the pesticide, and has important economic significance, environmental protection significance and ecological significance. The acetamiprid and the insecticidal and acaricidal composition are prepared into the effervescent tablet, and the effervescent tablet is simple in preparation method, convenient to operate, low in energy consumption, environment-friendly, capable of realizing continuous production and excellent in product quality. The effervescent tablet can effectively reduce the dosage of the medicament, is not easy to cause phytotoxicity of crops, and is convenient for popularization and application. Meanwhile, the effervescent tablet does not need to be dissolved and diluted in water and then sprayed for drug application, generates a large amount of bubbles after meeting water, and depends on the driving force of gas generated inside the tablet, so that the tablet is rapidly disintegrated, the effective ingredients are diffused more quickly and are distributed more uniformly, the diffusion range of the effective ingredients is large, and the drug effect can be fully exerted. In addition, the effervescent tablets can be directly and manually spread or spread in a paddy field by an airplane, and have directionality during pesticide application, so that the spread effervescent tablets can really reach required places, time and labor are saved, convenience and rapidness are realized, and the harm to pollinating insects such as bees is reduced; the effervescent tablet also enables the high-toxicity pesticide to be low-toxicity, can be directly spread by hands without poisoning, is not attached to stems and leaves of crops, can effectively avoid the flying of micro powder during spreading, simultaneously reduces the inhalation of the micro powder by operators in the pesticide spreading process, has small drift and small environmental pollution, avoids direct contact to kill natural enemies, and is safe for the pesticide spreaders.

Detailed Description

The invention provides an acetamiprid-and-dimehypo-containing effervescent tablet for a paddy field by broadcasting, which comprises effective components and auxiliary materials, wherein the effective components are the acetamiprid and the dimehypo in a mass ratio of 1-60: 1-60.

The acetamiprid and the dimehypo are compounded as the effective components in the insecticidal effervescent tablet provided by the invention, so that the insecticidal effect is improved. The invention takes acetamiprid and dimehypo as effective components and obtains the composition with good performance by compounding. The compound of the acetamiprid and the dimehypo has higher control effect on the rice planthopper and the rice stem borer, obvious synergistic effect exists between the two components, the dosage of the effective components is reduced after the mixture is used, the ecological and environmental pollution is effectively reduced, the resistance of pests to a single medicament can be delayed, and the pesticide composition has good application prospect.

In the composition, the mass ratio of the acetamiprid to the dimehypo is 1-60: 1-60, the acetamiprid to the dimehypo is better in insecticidal effect when the mass ratio of the acetamiprid to the dimehypo is 0.4-20: 1, the insecticidal effect is further improved when the mass ratio is 2-9: 1, and the insecticidal effect is best when the mass ratio is 5: 1.

The insecticide is prepared into an effervescent tablet formulation, so that the effervescent tablet formulation is convenient to use, spray application is not required, and the effervescent tablet formulation can be directly applied manually or by an airplane, so that time and labor are saved.

The content of active ingredients in the insecticidal effervescent tablet is 1-60 wt%, preferably 1-40 wt%, more preferably 20-30 wt%, and most preferably 25-30 wt%.

The effervescent tablet can be directly spread for use, and has the advantages of time saving, labor saving and higher safety. Under the condition that the dosage of the active ingredients per mu is determined, if the content of the active ingredients in the preparation is too high, the spacing between the tablets after the spreading is too large, the active ingredients need to be diffused for a long time after the tablets are disintegrated (the active ingredients have a degradation phenomenon in water), and the drug effect is not favorably exerted, so that the content of the active ingredients in the effervescent tablets is not higher than 60 wt%, and generally 1-60 wt% is selected. Meanwhile, the product reduces along with the content, the cost of required raw materials, production, packaging, transportation and the like is correspondingly increased, the comprehensive cost and the control effect are achieved, and the content of the effective components is preferably 1-40 wt%, more preferably 20-30 wt%, and most preferably 25-30 wt%.

Furthermore, the auxiliary materials of the effervescent tablet preparation can be selected from a dispersing agent, a wetting agent, a disintegrating agent and a filling material, wherein the disintegrating agent is divided into a disintegrating agent acid source (acid source for short) and a disintegrating agent alkali source (alkali source for short). The weight percentage of the active ingredients and each auxiliary material is as follows: 1 to 60 wt% (preferably 1 to 40 wt%, more preferably 20 to 30 wt%, most preferably 25 to 30 wt%), 3 to 8 wt% of a dispersant, 1 to 3 wt% of a wetting agent, 20 to 60 wt% of a disintegrant, and the balance being a filler. When the following weight percentage contents are adopted, the performance and the drug effect of the effervescent tablet are better: 1-60 wt% (preferably 1-40 wt%, more preferably 20-30 wt%, most preferably 25-30 wt%), 5 wt% of dispersant, 2 wt% of wetting agent, 30 wt% of disintegrant, and the balance filler. When the following weight percentage contents are adopted, the performance and the drug effect of the effervescent tablet are optimal: 25-30 wt% of active ingredients, 5 wt% of dispersing agent, 2 wt% of wetting agent, 30 wt% of disintegrating agent and the balance of filler.

In addition, under the condition that the dosage per mu of the active ingredients and the content of the active ingredients are determined, the weight of each effervescent tablet (the mass of each tablet) also has an influence on the drug effect. The quality of the single tablet is too low, the single tablet can fly off when being spread, the quality of the single tablet is too high, the space between the effervescent tablets in the field is too large, and the prevention dead angle can exist. Proved by verification, the effervescent tablet has better effect when the mass of a single tablet is 0.5-10.0g, such as 0.5g, 1.0g, 2.0g, 3.0g, 4g, 5g, 6g, 7g, 8g, 9g and 10 g. When the mass of the single piece is 0.5g, 1.0g and 2.0g, a small amount of drift phenomenon still exists when the single piece is spread for use; when the mass of each single piece is 4g, 5g, 6g, 7g, 8g, 9g and 10g, after the single piece is spread and used, the distance between the tablets and a paddy field is too large, the effective ingredients need to be dispersed for a long time after disintegration (the effective ingredients have a degradation phenomenon in water), and the effect is not exerted, so that the mass of each single piece is preferably 2.0-4.0g, and when the mass of each single piece is 3.0g, the effervescent performance and the effect are optimal.

In the effervescent tablet, the dispersing agent is one or more of sodium methylene dinaphthalene sulfonate, polynaphthalene sulfonate, sodium alkylphenol sulfonate, a copolymer of sodium acrylate and propionamide, sodium polyacrylate, sodium cellulose sulfonate, sodium fatty acid methyl ester sulfonate, polycarboxylate, maleic acid-acrylic acid copolymer salt, calcium lignosulfonate, sodium lignosulfonate, polyoxyethylene-polyoxypropylene block copolymer, aryl phenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether formaldehyde condensate sulfate.

In the effervescent tablet, the wetting agent is one or more of succinate sulfonate, dialkyl succinate sulfonate sodium salt, butyl naphthalene sulfonate sodium salt, isopropyl naphthalene sulfonate, alkyl naphthalene sulfonate sodium salt, alkylaryl sodium sulfonate, alkoxylate, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium tetradecyl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, N-lauryl azepan-2-one, N-methyl taurate sodium salt, a-sulfo fatty acid methyl ester sodium salt, a-alkene sodium sulfonate, alkylphenol polyoxyethylene ether sodium sulfate, alkylphenol polyoxyethylene ether succinic acid half ester sodium sulfonate, fatty acid sulfate and fatty acid ester sulfate.

In the effervescent tablet, the disintegrant consists of an acid source and an alkali source, the acid source of the disintegrant is one or more of citric acid, tartaric acid, succinic acid, adipic acid, sodium bisulfate, phosphoric acid, succinic acid, fumaric acid and malic acid, and the alkali source of the disintegrant is one or more of sodium bicarbonate, sodium carbonate, potassium bicarbonate and calcium carbonate.

In the effervescent tablet, the filler is one or more of kaolin, attapulgite, diatomite, bentonite, white carbon black, light calcium carbonate, corn starch, urea, talcum powder and anhydrous sodium sulfate.

When the auxiliary materials are selected from the following components, the effervescent tablet has better performance and drug effect: the dispersing agent is preferably formed by mixing fatty acid methyl ester sodium sulfonate and sodium alkyl phenol sulfonate according to the mass ratio of 1: 4; the wetting agent is preferably prepared by mixing sodium butylnaphthalene sulfonate and N-lauryl azepan-2-ketone according to the mass ratio of 1: 1; the acid source of the disintegrant is preferably citric acid, the alkali source of the disintegrant is preferably sodium carbonate, and the mass ratio of the acid source to the alkali source is 10: 20; the filler is preferably corn starch.

The invention also provides a preparation method of the insecticidal effervescent tablet, which comprises the following steps:

(1) mixing and crushing the active ingredients, the acid source of the disintegrating agent, part of the dispersing agent, part of the wetting agent and part of the filler, and then granulating to obtain granules A;

(2) mixing and crushing the disintegrating agent alkali source, the rest of dispersing agent, the rest of wetting agent and the rest of filler, and granulating to obtain granules B;

(3) and mixing and tabletting the granules A and the granules B to obtain the insecticidal effervescent tablet.

In the invention, the mass ratio of the partial dispersant to the rest dispersant is 1: 1;

the mass ratio of the partial wetting agent to the rest wetting agent is 1: 1;

the mass ratio of the part of the filler to the rest of the filler is 1: 1.

In the steps (1) and (2), the materials are pulverized by adopting an ultramicro airflow pulverization technology, and the obtained fine powder is about 550-750 meshes.

In the steps (1) and (2), a swinging granulator is used for granulation, and granules with the grain diameter of about 20 meshes are selected for drying and use.

In the steps (1) and (2), drying is carried out at the temperature of 60-65 ℃ until the moisture content is below 0.5 wt%.

In the step (3), tabletting is carried out by adopting a tabletting machine, and the weight of a single effervescent tablet is 0.5-10.0 g.

The acetamiprid and the dimehypo are compounded, so that the insecticidal effect is improved, the use amount of the pesticide is reduced, the generation of the drug resistance of pests is delayed, and the acetamiprid and the dimehypo effervescent tablet preparation can be directly applied by manpower or an unmanned plane, so that the time and the labor are saved. Therefore, the invention also protects the application of the insecticidal composition and the effervescent tablets thereof in preventing and controlling pests in paddy fields.

In the application, the pests in the paddy field are mainly rice planthoppers and rice borers. When the insecticidal composition is an effervescent tablet, the effervescent tablet is directly spread for use, and the operation is convenient.

The acetamiprid and the dimehypo are compounded, so that the advantages of the acetamiprid and the dimehypo are effectively exerted, the obtained product has excellent quality and good pesticide effect, can be used for preventing and controlling pests in a paddy field, and has a control effect obviously higher than that of the acetamiprid or the dimehypo alone. The insecticidal composition can obviously save economic cost, can reduce the residual quantity of the pesticide in agricultural products and environment, delay the generation of pesticide resistance of pests, prolong the service life of the pesticide, and has important economic significance, environmental protection significance and ecological significance.

The acetamiprid and the insecticidal and acaricidal composition are prepared into the effervescent tablet, and the effervescent tablet is simple in preparation method, convenient to operate, low in energy consumption, environment-friendly, capable of realizing continuous production and excellent in product quality. The effervescent tablet can effectively reduce the dosage of the medicament, is not easy to cause phytotoxicity of crops, and is convenient for popularization and application. Meanwhile, the effervescent tablet does not need to be dissolved and diluted in water and then sprayed for drug application, generates a large amount of bubbles after meeting water, and depends on the driving force of gas generated inside the tablet, so that the tablet is rapidly disintegrated, the effective ingredients are diffused more quickly and are distributed more uniformly, the diffusion range of the effective ingredients is large, and the drug effect can be fully exerted. In addition, the effervescent tablets can be directly and manually spread or spread in a paddy field by an airplane, and have directionality during pesticide application, so that the spread effervescent tablets can really reach required places, time and labor are saved, convenience and rapidness are realized, and the harm to pollinating insects such as bees is reduced; the effervescent tablet also enables the high-toxicity pesticide to be low-toxicity, can be directly spread by hands without poisoning, is not attached to stems and leaves of crops, can effectively avoid the flying of micro powder during spreading, simultaneously reduces the inhalation of the micro powder by operators in the pesticide spreading process, has small drift and small environmental pollution, avoids direct contact to kill natural enemies, and is safe for the pesticide spreaders.

The insecticidal composition provided by the invention is simple to prepare, can be prepared into effervescent tablets, can be used for preventing and killing pests in a paddy field, and has a control effect obviously higher than that of single-use acetamiprid or single-use bisultap. In addition, the effervescent tablet can also effectively avoid the flying of micro powder during the spreading, so that the high-toxicity pesticide is low in toxicity, the high-toxicity pesticide can be directly and manually spread or spread by an unmanned aerial vehicle, and meanwhile, the micro powder inhalation of operators in the pesticide spreading process is reduced, and the poisoning accident is avoided; the effervescent tablet generates a large amount of bubbles after meeting water, and the tablet disintegrates rapidly by relying on the driving force of gas generated in the tablet, so that the effective components diffuse more rapidly and are distributed more uniformly, the diffusion range of the effective components is large, and the drug effect can be fully exerted; the effervescent tablet is directly thrown into paddy field, which saves labor and force, reduces the damage to pollination insects such as natural enemies and bees, and has good application prospect.

In order to further understand the present invention, the following examples are provided to illustrate an acetamiprid and dimehypo-containing effervescent tablet for paddy field application by broadcasting, its preparation method and application, and the scope of the present invention is not limited by the following examples.