Insect prevention method for tobacco leaves

Abstract

The invention discloses a tobacco leaf insect prevention method, which belongs to the technical field of tobacco insect prevention and control, and comprises the steps of using aphidius gifuensis to prevent and control aphids, spraying a nutrient solution, using encarsia formosa to prevent and control bemisia tabaci, using trichogramma to prevent and control oriental tobacco budworms / cotton bollworms, using arma chinensis to prevent and control oriental tobacco budworms / cotton bollworms, and performing insect prevention post-treatment. By means of the three-bee and one-bug insect prevention method, the insect pest problem in the tobacco planting process can be solved, the application amount of chemical pesticides is reduced, meanwhile, the micro-ecological environment of a tobacco field is protected, and pesticide residues in tobacco leaves are reduced.

Description

technical field [0001] The invention belongs to the technical field of tobacco pest control, and in particular relates to a tobacco leaf pest control method. Background technique [0002] my country is the largest tobacco producing country in the world today. Tobacco has become an important economic crop in my country. The selection and use of pesticide types have always been valued and restricted. With the change of seedling raising and cultivation mode, the main diseases and insect pests that harm tobacco have also undergone great changes. From the previous "three diseases and three insects" (diseases: black shank / bacterial wilt, virus disease, wildfire disease / red spot disease; insect pests: cutworm, tobacco aphid, tobacco budworm / spodoptera litura), it has evolved into The new pattern of "three diseases and four insects" (diseases: black shank / bacterial wilt, viral diseases, wildfire / red spot; insect pests: cutworms, aphids, budworms / spodoptera litura, whitefly) At the...

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Problems solved by technology

[0003] At present, chemical control is still the main means of preventing and controlling tobacco pests in my country. The long-term excessive and irrational use of chemical pesticides has caused the following problems: the ecological environment of tobacco fields has been severely damaged; the resistance of tobacco field pests is getting stronger and stronger, making chemical pesticides The application amount of tobacco has increased year by year, the pollution environment has intensified, and the planting cost of tobacco farmers has also increased; the pesticide residues in tobacco leaves generally exceed the standard or the pesticides used will affect the leaves, resulting in a decrease in the quality of tobacco leaves and ultimately affecting the commodity value of tobacco leaves

[0004] Patent CN103848690B discloses a special liquid medicinal fertilizer for increasing tobacco production, preventing insects and degrading pesticide residues and its preparation method. The raw materials of the medicinal fertilizer include: microbial flora, humic acid, nitrogen fertilizer, phosphate fertilizer, potassium fertilizer, calcium fertilizer, boric acid, and insecticide , water-soluble release agent, plant growth regulator, etc.; the shortcoming of this patent: the use of pesticides will cause aggravated environmental pollution and reduce the quality of tobacco leaves

[0005] Patent CN110036803A discloses a method for the prevention and control of tobacco pests and diseases, including: winter plowing of tobacco fields, the depth of winter plowing is greater than or equal to 25cm, and the depth of subsoiling is greater than 40cm. More than 20 kilograms of cake fertilizer, add 20 kilograms of bean cakes; install isolation belts and traps for tobacco fields; use natural enemies of pests and insects to reproduce and release; spray biological pesticides; Recycling of mulch film and removing the film and cultivating soil; the deficiency of this patent: the biological pesticide Bordeaux mixture used is easy to roughen the leaves, reduce photosynthesis, and affect the quality of tobacco leaves

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