阅读说明：本技术 一种含有甲维盐和吡蚜酮组合物在防治稻飞虱上的应用 (Application of composition containing emamectin benzoate and pymetrozine to prevention and treatment of rice planthopper ) 是由 祝春华 朱永杰 孙世文 何孟夏 于 2020-12-03 设计创作，主要内容包括：本发明适用于杀虫剂技术领域,提供了一种含有甲维盐和吡蚜酮组合物在防治稻飞虱上的应用。通过将甲维盐和吡蚜酮二元复配,再利用乙醇和增效剂对其进行提纯增效,提升复配剂药效强度,然后通过研磨改性、粉碎造粒制得杀虫剂组合物,具有超高效、低毒和无残留、无公害的特点,校正防效率高,药效迟效期长,对稻飞虱的防治效果好；在有效杀灭稻飞虱的同时,用药量少,降低了施药成本,减少了对水稻和土壤的污染程度。(The invention is applicable to the technical field of pesticides, and provides application of a composition containing emamectin benzoate and pymetrozine to prevention and control of rice planthoppers. The emamectin benzoate and the pymetrozine are compounded in a binary manner, the mixture is purified and synergized by using ethanol and a synergist, the pesticide effect strength of the compounded agent is improved, and then the pesticide composition is prepared by grinding, modifying, crushing and granulating, so that the pesticide composition has the characteristics of ultra-high efficiency, low toxicity, no residue and no public hazard, is high in correction and prevention efficiency, long in pesticide effect delay period and good in prevention and control effect on rice planthoppers; the pesticide has the advantages of effectively killing rice planthoppers, simultaneously reducing the pesticide application cost and reducing the pollution degree to rice and soil, along with small dosage.)

1. An application of a composition containing emamectin benzoate and pymetrozine in preventing and treating rice planthopper.

2. Use according to claim 1, characterized in that it comprises the following steps:

1) mixing emamectin benzoate and pymetrozine in a mass ratio of 1: (4-8) carrying out binary compounding to obtain a compound agent;

2) pouring 20-30% of the compound agent, 3-5% of the wetting agent and 6-10% of the synergist into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 40-60 min to obtain a mixture;

3) pouring 40-50% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and fully grinding the mixture into a suspension by using the ball mill to obtain a suspension;

4) mixing 20-30% of a suspension agent, 3-5% of a thickening agent and 3-5% of a cosolvent according to mass percent, adding water to complement to 100%, and grinding and modifying by using a ball mill again to obtain a modifier;

5) crushing the modifier into wettable powder by an ultramicro jet mill;

6) adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

7) and granulating and drying to obtain the pesticide composition.

3. The use according to claim 2, wherein the compound mass ratio of the emamectin benzoate and the pymetrozine in the step 1) is 1: 6.

4. Use according to claim 2, characterized in that the wetting agent in step 2) is a polyoxyethylene alkylated ether.

5. The use according to claim 2, wherein the synergist in step 2) is propylparaben.

6. The application of claim 2, wherein the rotation speed of the stirring kettle in the step 2) is 1800-2100 r/min.

7. The use according to claim 2, characterized in that the grinding time of the ball mill in step 3) is 3-6 h.

8. Use according to claim 2, characterized in that the thickener in step 4) is polyvinylpyrrolidone.

9. The use of claim 2, wherein the cosolvent in step 4) is sodium benzoate.

10. The use according to claim 7, wherein the micronizer of step 5) has a particle size of 200-300 mesh.

Technical Field

The invention relates to the technical field of pesticides, and particularly relates to application of a composition containing emamectin benzoate and pymetrozine to control of rice planthoppers.

Background

Rice is a cereal crop of the genus Oryza, and the representative species is rice. The rice is native to China and India, and the rice is planted by precedents in Yangtze river basin of China seven thousand years ago. The rice is classified into indica rice and japonica rice, early rice and middle and late rice, glutinous rice and non-glutinous rice according to the rice type. The conventional rice and hybrid rice are classified according to the seed reserving mode. Other classifications, including paddy rice and floating rice, are made according to whether soilless culture is performed; dividing season rice and overyear ratoon rice according to the life cycle; dividing into common rice and giant rice according to height; the method is divided into common light rice and sea rice according to saline-alkali tolerance. The rice is obtained by removing glume from rice, weighing brown rice, and grinding rice bran layer to obtain the final product. Approximately half of the world population uses rice as staple food. Besides being edible, the rice can also be used as industrial raw materials for brewing wine and making sugar, and the rice hulls and rice straws can be used as livestock feed. The main production areas of Chinese rice are Yangtze river basin, Zhujiang river basin and northeast region.

Rice planthopper belongs to the family of homoptera lice and is used for puncturing plant juice to harm crops such as rice and the like. The main three types of plant hoppers harmful to rice in China are as follows: brown planthopper, sogatella furcifera and laodelphax striatellus, wherein the brown planthopper is the most serious in occurrence and damage, and the sogatella furcifera is the second most serious.

Emamectin benzoate, a white or pale yellow crystalline powder, soluble in acetone and methanol, slightly soluble in water, insoluble in hexane. The pesticide is a novel high-efficiency semi-synthetic antibiotic pesticide synthesized from a fermentation product abamectin B1, and has the characteristics of super high efficiency, low toxicity (the preparation is nearly nontoxic), low residue, no public nuisance and other biological pesticides. Is widely used for preventing and controlling various pests on crops such as vegetables, fruit trees, cotton and the like.

Pymetrozine belongs to pyridine or triazone insecticides, is a brand-new non-biocidal insecticide, and has excellent control effect on piercing-sucking mouthpart pests of various crops. Pymetrozine has contact poisoning effect on pests and systemic activity. Can be transported in the xylem and phloem of the plant body; therefore, the fertilizer can be used for foliar spraying and soil treatment. Due to the good transmission and conduction characteristics, branches and leaves newly grown after stem and leaf spraying can be effectively protected.

In the prior rice planthopper control process, high-toxicity pesticide control is mainly used, conventional single pesticide pesticides such as imidacloprid, dichlorvos, chlorpropham and the like are contra-oral pesticides for controlling the rice planthopper, the single pesticides are used for a long time, the pesticide application technology is unreasonable, the control effect of the existing single pesticides on the rice planthopper is poor, and in order to effectively solve the insect pest problem, a method of increasing pesticide dosage is usually adopted, so that the planting cost of crops is increased, and the environment is polluted; moreover, the use of such highly toxic pesticides can cause serious pollution to soil and rice itself, and thus, drug residues are likely to be formed.

Disclosure of Invention

The embodiment of the invention provides an application of a composition containing emamectin benzoate and pymetrozine in controlling rice planthopper, aiming at obtaining the pesticide composition by binary compounding of the emamectin benzoate and the pymetrozine, purifying and synergizing the compound by using ethanol and a synergist, improving the pesticide effect strength of the compound agent, grinding, modifying, crushing and granulating the compound agent, and having the characteristics of ultra-high efficiency, low toxicity, no residue and no public nuisance.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

an application of a composition containing emamectin benzoate and pymetrozine in preventing and treating rice planthopper.

Further, the application comprises the following steps:

1) mixing emamectin benzoate and pymetrozine in a mass ratio of 1: (4-8) carrying out binary compounding to obtain a compound agent;

2) pouring 20-30% of the compound agent, 3-5% of the wetting agent and 6-10% of the synergist into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 40-60 min to obtain a mixture;

3) pouring 40-50% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and fully grinding the mixture into a suspension by using the ball mill to obtain a suspension;

4) mixing 20-30% of a suspension agent, 3-5% of a thickening agent and 3-5% of a cosolvent according to mass percent, adding water to complement to 100%, and grinding and modifying by using a ball mill again to obtain a modifier;

5) crushing the modifier into wettable powder by an ultramicro jet mill;

6) adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

7) and granulating and drying to obtain the pesticide composition.

Further, the compound mass ratio of the emamectin benzoate to the pymetrozine in the step 1) is 1: 6.

Further, the wetting agent in the step 2) is polyoxyethylene alkylated ether.

Further, the synergist in the step 2) is propyl p-hydroxybenzoate.

Further, the rotating speed of the stirring kettle in the step 2) is 1800-2100 r/min.

Further, the grinding time of the ball mill in the step 3) is 3-6 h.

Further, the thickening agent in the step 4) is polyvinylpyrrolidone.

Further, the cosolvent in the step 4) is sodium benzoate.

Further, the pulverizing particle size of the ultramicro jet mill in the step 5) is 200-300 meshes.

The invention has the following beneficial effects:

according to the invention, emamectin benzoate and pymetrozine are subjected to binary compounding, then the mixture is purified and synergized by using ethanol and a synergist, the pesticide effect strength of the compound agent is improved, and then the pesticide composition is prepared by grinding, modifying, crushing and granulating, so that the pesticide composition has the characteristics of ultra-high efficiency, low toxicity, no residue and no public hazard, is high in correction and prevention efficiency, long in pesticide effect delay period and good in prevention and control effect on rice planthoppers; the pesticide has the advantages of effectively killing rice planthoppers, simultaneously reducing the pesticide application cost and reducing the pollution degree to rice and soil, along with small dosage.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Emamectin benzoate, a white or pale yellow crystalline powder, soluble in acetone and methanol, slightly soluble in water, insoluble in hexane. The pesticide is a novel high-efficiency semi-synthetic antibiotic pesticide synthesized from a fermentation product abamectin B1, and has the characteristics of super high efficiency, low toxicity (the preparation is nearly nontoxic), low residue, no public nuisance and other biological pesticides. Is widely used for preventing and controlling various pests on crops such as vegetables, fruit trees, cotton and the like.

Pymetrozine belongs to pyridine or triazone insecticides, is a brand-new non-biocidal insecticide, and has excellent control effect on piercing-sucking mouthpart pests of various crops. Pymetrozine has contact poisoning effect on pests and systemic activity. Can be transported in the xylem and phloem of the plant body; therefore, the fertilizer can be used for foliar spraying and soil treatment. Due to the good transmission and conduction characteristics, branches and leaves newly grown after stem and leaf spraying can be effectively protected.

The invention provides application of a composition containing emamectin benzoate and pymetrozine to control rice planthopper.

In the embodiment of the present invention, the application includes the following steps:

1) mixing emamectin benzoate and pymetrozine in a mass ratio of 1: (4-8) carrying out binary compounding to obtain a compound agent;

2) pouring 20-30% of the compound agent, 3-5% of the wetting agent and 6-10% of the synergist into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 40-60 min to obtain a mixture;

3) pouring 40-50% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and fully grinding the mixture into a suspension by using the ball mill to obtain a suspension;

4) mixing 20-30% of a suspension agent, 3-5% of a thickening agent and 3-5% of a cosolvent according to mass percent, adding water to complement to 100%, and grinding and modifying by using a ball mill again to obtain a modifier;

5) crushing the modifier into wettable powder by an ultramicro jet mill;

6) adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

7) and granulating and drying to obtain the pesticide composition.

In the embodiment of the invention, the compound mass ratio of the emamectin benzoate and the pymetrozine in the step 1) is 1: 6.

In the embodiment of the invention, the wetting agent in the step 2) is polyoxyethylene alkylated ether.

In the embodiment of the invention, the synergist in the step 2) is propyl paraben.

In the embodiment of the invention, the rotating speed of the stirring kettle in the step 2) is 1800-2100 r/min.

In the embodiment of the invention, the grinding time of the ball mill in the step 3) is 3-6 h.

In the embodiment of the present invention, the thickener in step 4) is polyvinylpyrrolidone.

In the embodiment of the invention, the cosolvent in the step 4) is sodium benzoate.

In the embodiment of the invention, the superfine jet mill in the step 5) has a milling particle size of 200-300 meshes.

The technical solution and the technical effect of the present invention will be further described by specific examples.

Example 1

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 4, compounding in a binary manner to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 2

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1:5, compounding in a binary manner to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 3

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1:6, compounding in a binary mode to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 4

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 7, binary compounding to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 5

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 8, binary compounding to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 6

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 4, compounding in a binary manner to obtain a compound agent;

pouring 25% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 7

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 4, compounding in a binary manner to obtain a compound agent;

pouring 30% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 8

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 4, compounding in a binary manner to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 45% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 9

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 4, compounding in a binary manner to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 50% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 20% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 10

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 4, compounding in a binary manner to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 25% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Example 11

Mixing emamectin benzoate and pymetrozine in a mass ratio of 1: 4, compounding in a binary manner to obtain a compound agent;

pouring 20% of the compound agent, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 30% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Selecting paddy fields with the same geographical position and rice growth vigor and infected with rice planthoppers with the same degree for numbering, mixing the pesticide composition prepared in each group of the embodiments with water according to the mass ratio of 1:50, and then respectively and uniformly throwing the pesticide composition to the roots of the rice plants in each group of the paddy fields.

The rice planthopper correction prevention efficiency of each group of rice after the application of the rice for 3 days, 7 days and 15 days is counted, and specific results are shown in table 1.

TABLE 1

As can be seen from table 1, the pesticide containing the emamectin benzoate and pymetrozine composition prepared by the invention has better control effect and longer pesticide effect period in the application of controlling rice planthopper, wherein the pesticide containing the emamectin benzoate and pymetrozine composition prepared in example 3 has the best control performance on rice planthopper; according to the embodiments 1-5, when the compound ratio of emamectin benzoate to pymetrozine is 1:6, the rice planthopper control performance is the best; according to the examples 1, 6 and 7, when the mass percent of the compound agent is 25%, the rice planthopper control performance is best; according to the examples 1, 8 and 9, when the mass percent of the mixture is 45%, the rice planthopper control performance is best; according to examples 1, 10 and 11, the control of rice planthopper is best when the mass percent of the suspension is 25%.

Further, the invention takes the experimental conditions of example 1 as the basis, and carries out a single-factor deletion comparison experiment on emamectin benzoate and pymetrozine, and the experimental result shows that different factors are deleted, and the control effect of the rice planthopper is different to a certain extent, and the specific results are shown in the following comparative examples.

Comparative example 1

Pouring 20% of emamectin benzoate, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 30% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Comparative example 2

Pouring 20% of pymetrozine, 4% of polyoxyethylene alkylated ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 30% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Comparative example 3

Pouring 4% of polyoxyethylene alkyl ether and 8% of propylparaben into a stirring kettle according to the mass percentage, adding ethanol to complement to 100%, and stirring for 50min at the rotating speed of 2000r/min to obtain a mixture;

pouring 40% of the mixture into a ball mill according to the mass percentage, adding diatomite to complement to 100%, and grinding for 5 hours by using the ball mill until the mixture is in a suspension state to obtain a suspension agent;

mixing 30% of suspending agent, 4% of polyvinylpyrrolidone and 4% of sodium benzoate according to mass percentage, adding water to complement to 100%, and grinding and modifying by a ball mill again to obtain modifier;

crushing the modifier into wettable powder with 300-mesh granularity by an ultramicro jet mill;

adding the wettable powder into a fluidized bed drying granulator, and adding a polyethylene glycol aqueous solution into the granulator to granulate in a fluidized bed;

and granulating and drying to obtain the pesticide composition.

Control group

The rice was applied with the same method and amount of the commercially available general insecticide as in the above examples.

And respectively counting the rice planthopper correction and prevention efficiency of the rice in each group of proportion and blank group after the rice is applied for 3 days, 7 days and 15 days, wherein the specific results are shown in a table 2.

TABLE 2

As can be seen from Table 2, compared with the single use of emamectin benzoate and pymetrozine, the pesticide containing the emamectin benzoate and pymetrozine composition prepared by the invention has the advantages of high correction and prevention efficiency, long pesticide effect delay period, good prevention and treatment effect on rice planthopper, small compound dosage, reduced pesticide application cost and reduced environmental pollution.

In general, the emamectin benzoate and the pymetrozine are compounded in a binary way, the mixture is purified and synergized by using ethanol and a synergist, the pesticide effect strength of the compounded agent is improved, and then the pesticide composition is prepared by grinding, modifying, crushing and granulating, so that the pesticide composition has the characteristics of ultra-high efficiency, low toxicity, no residue and no public nuisance, is high in correction and prevention efficiency, long in pesticide effect delay period and good in prevention and control effect on rice planthoppers; the pesticide has the advantages of effectively killing rice planthoppers, simultaneously reducing the pesticide application cost and reducing the pollution degree to rice and soil, along with small dosage.

It should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.