阅读说明：本技术 一种防治玉米虫害的农药及其应用 (Pesticide for preventing and treating corn insect pests and application thereof ) 是由 侯青光 卢亚妮 韦林汕 黄柄壬 韦贵剑 黄小英 赵峰进 韦日健 蔡理文 于 2020-07-27 设计创作，主要内容包括：本发明涉及农药领域,特别是涉及一种防治玉米虫害的农药及其应用。本发明提供的防治玉米虫害的农药,包括生物药剂和杀虫剂；生物药剂包括苏云金杆菌可湿性粉剂和湿细沙；所述杀虫剂包括内吸性杀虫剂和可杀虫卵杀虫剂。本发明提供的农药能够有效提高防治草地贪夜蛾的速效性,提高杀灭草地贪夜蛾的效率,还能有效延长药物的持效性,大大减少药物的施撒频率,降低农药的危害并降低栽培成本。(The invention relates to the field of pesticides, in particular to a pesticide for preventing and treating corn insect pests and application thereof. The pesticide for preventing and treating the corn insect pests comprises a biological agent and an insecticide; the biological agent comprises bacillus thuringiensis wettable powder and wet fine sand; the insecticides include systemic insecticides and insecticidal egg insecticides. The pesticide provided by the invention can effectively improve the quick-acting property for preventing and controlling Spodoptera frugiperda, improve the efficiency for killing Spodoptera frugiperda, effectively prolong the lasting effect of the pesticide, greatly reduce the application frequency of the pesticide, reduce the harm of the pesticide and reduce the cultivation cost.)

1. A pesticide for controlling insect pests in corn, wherein the pesticide comprises a biological agent and an insecticide; the biological agent comprises bacillus thuringiensis wettable powder and wet fine sand; the insecticides include systemic insecticides and insecticidal egg insecticides.

2. The pesticide of claim 1, wherein the enzyme activity of the bacillus thuringiensis in the bacillus thuringiensis wettable powder is 168000IU/mg, and the dosage of the bacillus thuringiensis wettable powder is 100-200 g/mu; the water content of the wet fine sand is 40-50 wt%; the mass ratio of the bacillus thuringiensis wettable powder to the wet fine sand is (100-200): (8000-15000).

3. The pesticide of claim 1, wherein the systemic insecticide is an abamectin-chlorophenyl glyoxyl formulation; the insecticidal ovum pesticide is a lufenuron-methyl preparation.

4. The pesticide as claimed in claim 3, wherein the content of the lufenuron in the lufenuron preparation is 45% by mass; the dosage of the lufenuron A preparation is 4-6 g/mu; the mass percentage of the abamectin in the abamectin-chlorophenyl glyoxylic preparation is 1.7 percent, the mass percentage of the chlorantraniliprole is 4.3 percent, and the dosage of the abamectin-chlorophenyl glyoxylic preparation is 40-60 ml/mu.

5. Use of the pesticide of any one of claims 1 to 4 for controlling corn pests, said use comprising sequential application of a biological agent and application of an insecticide; the application method of the biological agent is that the biological agent is artificially spotted in the heart leaves of each corn; the insecticide is applied by using an unmanned aerial vehicle, and the application speed is 3.0 m/s.

6. The use according to claim 5, wherein the application time of the biological agent and the application time of the insecticide occur during the large flare of the corn.

7. The use according to claim 5, wherein the application time of the biological agent and the application time of the insecticide are separated by 0 to 3 days.

8. The use of claim 5, wherein the amount of the biological agent is 2-5 g/strain.

9. The use according to claim 5, wherein the application of the insecticide comprises: mixing the lufenuron A preparation, the abamectin and chlorophenyl glyoxylic preparation and water and then spreading; the mass of the lufenuron-methyl preparation, the volume of the abamectin-chlorophenyl glyoxylic preparation and the volume ratio of water are 5 g: 50 ml: (2500-3000 ml).

10. Use according to claim 5, wherein the insect pest is a pest from Spodoptera frugiperda.

Technical Field

The invention relates to the field of pesticides, in particular to a pesticide for preventing and treating corn insect pests and application thereof.

Background

Spodoptera frugiperda (J.E. Smith) is originally distributed in the western hemisphere areas of Central and south America, belongs to Noctuidae of Lepidoptera Spodoptera, and is one of the important migratory pests in corn and other major economic crops. The Spodoptera frugiperda has the characteristics of wide hosts, ecological polymorphism, growth adaptability, migration diffusivity and the like, so that the control of insect pests caused by the Spodoptera frugiperda is particularly difficult.

The damage period of Spodoptera frugiperda can be from the seedling period to the harvesting period of corn, and great loss is brought to the production of corn. In the existing method for preventing and treating spodoptera frugiperda, the period of adequate rainwater in summer in the season with high emergence of spodoptera frugiperda insect pests is short in the time effect of preventing and treating the insect pests due to rain wash and the like, and the prevention and treatment period is usually only 5-7 days. And the Spodoptera frugiperda has strong migratory flight property and serious generation overlapping, and cannot play a good control effect in a short control period.

Disclosure of Invention

In order to solve the problems, the invention provides a pesticide for preventing and treating corn insect pests and application thereof. The pesticide for preventing and treating the corn insect pests and the application thereof provided by the invention not only can play a role in killing spodoptera frugiperda, but also can give consideration to the quick-acting property and the lasting property of the pesticide.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a pesticide for preventing and treating corn insect pests, which comprises a biological agent and an insecticide; the biological agent comprises bacillus thuringiensis wettable powder and wet fine sand; the insecticides include systemic insecticides and insecticidal egg insecticides.

Preferably, the enzyme activity of the bacillus thuringiensis in the bacillus thuringiensis wettable powder is 168000IU/mg, and the dosage of the bacillus thuringiensis wettable powder is 100-200 g/mu; the water content of the wet fine sand is 40-50 wt%; the mass ratio of the bacillus thuringiensis wettable powder to the wet fine sand is (100-200): (8000-15000).

Preferably, the systemic insecticide is a lufenuron-methyl preparation; the insecticidal egg insecticide is an abamectin-chlorophenyl glyoxylic preparation.

Preferably, the mass percentage content of the lufenuron in the lufenuron preparation is 45%; the dosage of the lufenuron A preparation is 4-6 g/mu; the mass percentage of the abamectin in the abamectin-chlorophenyl glyoxylic preparation is 1.7 percent, the mass percentage of the chlorantraniliprole is 4.3 percent, and the dosage of the abamectin-chlorophenyl glyoxylic preparation is 40-60 ml/mu.

The invention also provides application of the pesticide in preventing and treating corn insect pests, which comprises the steps of sequentially applying biological agents and spreading pesticides; the biological agent is artificially spotted in the heart leaves of each corn; the insecticide is applied by using an unmanned aerial vehicle, and the application speed is 3.0 m/s.

Preferably, the application time of the biological agent and the application time of the pesticide occur during the large flare period of the corn.

Preferably, the application time of the biological agent and the application time of the pesticide are separated by 0-3 days.

Preferably, the dosage of the biological medicament is 2-5 g per plant.

Preferably, the application of the insecticide comprises: mixing the lufenuron A preparation, the abamectin and chlorophenyl glyoxylic preparation and water and then spreading; the mass of the lufenuron-methyl preparation, the volume of the abamectin-chlorophenyl glyoxylic preparation and the volume ratio of water are 5 g: 50 ml: (2500-3000 ml).

Preferably, the insect pest is a pest caused by spodoptera frugiperda.

The invention provides a pesticide for preventing and treating corn insect pests and application thereof. The invention mixes bacillus thuringiensis wettable powder and wet fine sand uniformly and applies the mixture as biological agent in corn heart leaves, and sprays systemic insecticide capable of killing insect eggs again within three days of applying the biological agent. The invention combines the biological agent and the chemical insecticide, can effectively improve the quick action of preventing and controlling the spodoptera frugiperda, quickens the efficiency of killing the spodoptera frugiperda, can also effectively prolong the persistence of the drug, greatly reduces the spreading frequency of the drug, reduces the harm of the pesticide and reduces the cultivation cost. The embodiment shows that the population reduction rate and the control effect of the method for preventing and controlling the Spodoptera frugiperda in the large-horn period of the corn are more than 90 percent within 3 days and 7 days after application, the population reduction rate and the control effect are more than 80 percent after 10 days, and the population reduction rate and the control effect are more than 65 percent after 20 days. The invention not only gives consideration to the quick-acting property and the lasting property of the pesticide, but also has good effect of preventing and controlling the spodoptera frugiperda.

Detailed Description

The invention provides a pesticide for preventing and treating corn insect pests, which comprises a biological agent and an insecticide; the biological agent comprises bacillus thuringiensis wettable powder and wet fine sand; the insecticides include systemic insecticides and insecticidal egg insecticides. The pesticide of the invention integrates the advantages of safety of biological agents, high efficiency and long acting of the pesticide, and overcomes the defects of single agent or single pesticide application method.

In the invention, the enzyme activity of the bacillus thuringiensis in the bacillus thuringiensis wettable powder is preferably 168000IU/mg, and the dosage of the bacillus thuringiensis wettable powder is preferably 100-200 g/mu; the water content of the wet fine sand is preferably 40-50 wt%; the mass ratio of the bacillus thuringiensis wettable powder to the wet fine sand is preferably (100-200): (8000-15000). The bacillus thuringiensis wettable powder and the wet fine sand are mixed for use, so that the biological medicament can be effectively fixed, and the drug effect of the biological medicament is prolonged. The source of the bacillus thuringiensis wettable powder used in the invention is not particularly limited, and the conventional commercial product of the bacillus thuringiensis wettable powder, which is well known to those skilled in the art, such as bacillus thuringiensis of Dashan Qianjin Shanxi, science and technology Limited, is adopted.

In the present invention, the systemic insecticide is preferably an avermectin-chlorophenyl glyoxylic preparation; the mass percentage of the abamectin in the abamectin-chlorophenyl glyoxylic preparation is preferably 1.7%, the mass percentage of the chlorantraniliprole is preferably 4.3%, and the dosage of the abamectin-chlorophenyl glyoxylic preparation is preferably 40-60 ml/mu, and is further preferably 50 ml/mu; the insecticidal ovum insecticide is preferably a lufenuron-methyl preparation; the mass percentage content of the lufenuron in the lufenuron preparation is preferably 45%; the dosage of the lufenuron A preparation is preferably 4-6 g/mu, and further preferably 5 g/mu; the source of the preparations such as systemic insecticide and insecticidal ovum insecticide used in the invention is not particularly limited, and conventional commercial products well known to those skilled in the art can be adopted, such as Emamectin-lufenuron produced by Syngenta and Abamectin-Chlorobenzoyl produced by the same. To avoid the development of drug resistance, a group of systemic insecticides and insecticidal egg insecticides are used only once per growth season.

The invention also provides application of the pesticide in preventing and treating corn insect pests, which comprises the steps of sequentially applying biological agents and spreading pesticides; the biological agent is artificially spotted in the heart leaves of each corn; the dosage of the biological medicament is preferably 2-5 g/plant. The corn spodoptera frugiperda is prevented and treated by dropping the biological agent on the corn heart leaves, so that the biological agent can directly reach the position where pests are located, and the utilization rate of the biological agent is improved. In the present invention, the insecticide is preferably applied using a drone, and the application speed is preferably 3.0 m/s.

In the present invention, the application time of the biological agent and the application time of the insecticide preferably occur during the large flare period of the corn. The growth vigor of the corn is the most vigorous in the large flare period of the corn, and the growth vigor is a key period for preventing and controlling corn pests. The pesticide provided by the invention can be used once in the large-horn mouth period of corn, and the pesticide effect duration time is more than 20 days, so that the pesticide effect of the pesticide can be continued to the spinning and flour scattering period of corn after the pesticide is used in the large-horn mouth period of corn. After all the corn leaves in the silking and powder scattering period are opened, preferably applying a pesticide in the silking and powder scattering period for one time, and preferably applying a pesticide in the silking and powder scattering period by using an unmanned aerial vehicle; the pesticides used in the silking and powder scattering period are preferably an avermectin-chlorophenyl glyoxylic preparation and a lufenuron-methyl; the application method is preferably that 7.5 g/mu of the lufenuron-methyl preparation and 300 ml/mu of the abamectin-chlorophenyl acyl preparation are uniformly mixed and then dissolved in 4.5L/mu of water, and the mixture is sprayed once at the speed of 3.0m/s by using an unmanned aerial vehicle. The invention preferably performs one-time seedling-stage pesticide control in the corn seedling stage, and the seedling-stage pesticide applied in the corn seedling stage is preferably mixed application of chlorfenapyr and lufenuron; the application method is preferably that 5 g/mu of the lufenuron-methyl preparation and 50 ml/mu of the abamectin-chlorophenyl acyl preparation are dissolved in 37.5L/mu of water for spraying application. The invention preferably applies the pesticide for three times in the whole growth period of the corn, and can more effectively avoid the insect pests such as Spodoptera frugiperda and the like.

In the present invention, the time interval between the application of the biological agent and the application of the insecticide is preferably 0 to 3 days.

In the present invention, the application of the insecticide preferably comprises: mixing the lufenuron A preparation, the abamectin and chlorophenyl glyoxylic preparation and water and then spreading; the mass of the lufenuron-methyl preparation, the volume of the abamectin-chlorophenyl glyoxylic preparation and the volume ratio of water are preferably 5 g: 50 ml: (2500-3000 ml).

In the present invention, the insecticide is preferably applied using a drone, and the application speed is preferably 3.0 m/s. According to the invention, when the unmanned aerial vehicle is used for applying the pesticide, the flying prevention aid is required to be added, the source of the flying prevention aid is not specially limited, the conventional commercially available product well known to the technical personnel in the field can be adopted, and the using method can be selected according to the description in the specification of the selected flying prevention aid. According to the invention, the biological agent, the insecticide and the manual point application operation are preferably matched with the fertilization of the unmanned aerial vehicle (preferably a plant protection unmanned aerial vehicle), and the unmanned aerial vehicle is used for replacing workers to apply the insecticide, so that the burden of the workers is reduced, the possibility of pesticide poisoning of the workers is avoided, and the defect that the traditional large-scale mechanical pesticide spraying is limited to the terrain is also solved.

The pesticide, the flight control auxiliary agent and the like used in the invention have no special requirements on sources and are purchased from the market.

In order to further illustrate the present invention, the following examples are given to describe the pesticide for controlling corn pest and its application in detail, but they should not be construed as limiting the scope of the present invention.