Method for preventing and treating potato late blight through insecticides

Abstract

The invention provides a method for preventing and treating the potato late blight through insecticides. The method is characterized in that (1) in the initial potato squaring stage when the potato late blight does not come on, insecticide spraying is carried out on complete potato seedlings with 40kg-50kg of mixed preparation liquid per mu for the first time, wherein the mass ratio is that 75% mancozeb:water is 1:450-600; (2) when center diseased potato seedlings are found in the field, insecticide spraying is carried out on the complete potato seedlings with 40kg-50kg of mixed preparation liquid per mu for the second time, wherein the mass ratio is that 25% mandipropamid suspending agents:oxadixyl:water is 1:3-4:1500-1800; (3) when insecticide spraying for the second time is carried out 7-10 days later, insecticide spraying is carried out on the complete potato seedlings with 40kg-50kg of mixed preparation liquid per mu for the third time, wherein the mass ratio is that qomycete disease sterilizing agents:water is 1:600-700. By means of the method, equal attention is paid to prevention and treatment, and occurrence and spreading of the potato late blight are effectively controlled. The types of the insecticides used in all stages are different, the insecticide resistance is reduced, and the effect for preventing and treating the potato late blight through the insecticides is improved.

Description

technical field [0001] The invention relates to a method for preventing and treating potato late blight with medicine. Background technique [0002] Potato late blight caused by Phytophthora infestans phytophthora infestans (Mont.) deBary] is a common and serious disease in potato production. Potato plants die early due to the occurrence of late blight, resulting in loss of yield and reduction in quality, and in severe years, the yield is reduced by more than 50%. Drug control is an important method for the prevention and control of potato late blight, but the current method of drug prevention and control of potato late blight is supplemented by prevention and treatment. The same type or the same medicament is used when selecting different stages of treatment drugs. In this way, the epidemic of potato late blight It is difficult to be effectively controlled, and the second is that the same type or the same drug is administered at different stages, the drug resistance is e...

AI Technical Summary

Problems solved by technology

Potato plants die early due to the occurrence of late blight, resulting in loss of yield and quality reduction, and in serious years, the yield can be reduced by more than 50%.

Drug control is an important method for the prevention and control of potato late blight, but the current method of drug prevention and control of potato late blight is supplemented