A method for reducing the incidence of tobacco aphid-borne diseases

Abstract

The invention provides a method for reducing the incidence of tobacco aphid-transmitted diseases. The method includes the steps that sunflowers are used as aphid inducing crops and planted on the periphery of a 15-30-mu tobacco field into strips with the width ranging from 2 m to 3 m 3-4 weeks before tobacco seedlings are transplanted; aphid killing pesticide starts to be sprayed once every two weeks one week after the sunflower plants are germinated, while the aphid killing pesticide is not sprayed to field tobacco. By means of the method, it can be limited or reduced that tobaccos are infected or directly harmed by aphid-transmitted viruses, the incidence of tobacco aphid-transmitted diseases can be obviously reduced, and the application quantity of chemical pesticides in the tobacco field can be reduced, so that the pesticide residues in tobacco leaves are reduced, the quality of tobacco leaves is improved, and the tobacco planting economic benefits of tobacco growers are increased.

Description

technical field [0001] The invention belongs to the technical field of tobacco plant protection, and in particular relates to a method for reducing the incidence of tobacco aphid-borne diseases. Background technique [0002] Tobacco belongs to the annual herbaceous plant of Solanaceae and is an important economic crop in my country. Virus disease is the most prominent problem in current tobacco production. Its harm has spread all over the country, and it is becoming more and more serious. It not only causes a major loss of tobacco leaf output, but also seriously reduces the quality of tobacco leaves, especially the proportion of high-to-medium tobacco and Intrinsic quality has dropped noticeably. At present, viral diseases have risen to be the main diseases restricting tobacco production in my country. Therefore, controlling viral diseases is very important for tobacco farmers. So far, there are 16 kinds of tobacco virus diseases that have been identified in my country. T...

AI Technical Summary

Problems solved by technology

Viral diseases are mostly transmitted by insect vectors, among which aphids are the main communicators of viral diseases. Among the 16 known viral diseases in my country, 9 are transmitted by aphids, such as CMV, PVY, TVMV, TEV, TVBMV, etc. huge losses in production

In addition, aphids also cause direct damage to tobacco plants at the seedling and field stages of tobacco.

After eating by aphids, the tobacco leaves shrink and become thinner, and the severely damaged plants grow slowly, are prone to soot, and are fragile and lack luster after modulation. The cigarettes made are not good and have poor combustion performance, which seriously affects the yield of tobacco and quality

In the past, chemical insecticides were mainly used to control aphids. During the period of aphid occurrence, farmers usually increase the amount of pesticides used and the frequency of spraying to reduce the number of aphids. Before being killed, the carried virus has been released. Therefore, although the spraying of chemical agents has reduced the number of aphids, it has limited effect on reducing the incidence of viral diseases, and has caused an increase in pesticide residues in tobacco leaves, affecting the safety of tobacco leaves. , hindering the sustainable development of tobacco leaves

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