Control method for tobacco black shank disease

Abstract

The invention provides a control method for a tobacco black shank disease. The prevention effect on the tobacco black shank disease is better, the incidence rate of the tobacco black shank disease is greatly reduced, the effect is good, and the yield and the quality of tobacco are improved. The method is carried out according to the following modes: (1) ecological soil management comprising (1.1) application of 200-300ml of Difulai per acre and (1.2) biological control namely watering of the root by using a high yield technology; (2) agricultural control; (3) physical control, wherein diseased plant residual bodies are removed and are destroyed in a gathered manner; (4) chemical control, wherein after transplanting and seedling returning, the root is watered for one time by using metalaxyl-mancozeb, and the root is watered by using propamocarb hydrochloride water or metalaxyl-propamocarb wettable powder in a tobacco-growing area where black shank germs show resistance to metalaxyl. According to the method, the tobacco black shank disease can be effectively prevented by the ecological soil management; meanwhile, comprehensive control is carried out by taking the measures of agricultural control, physical control and the like, so that the average incidence rate of the tobacco black shank disease is reduced, the yield is increased, the tobacco grade is remarkably improved, and good economical benefits are gained.

Description

technical field [0001] The invention relates to the field of tobacco disease prevention, in particular to a method for preventing and treating tobacco black shank disease. Background technique [0002] Tobacco, Latin scientific name: Nicotianatabacum. Tobacco is an important economic crop. Tobacco is an annual herbaceous plant in the family Solanaceae, and there are about 60 species of Nicotiana. Tobacco black shank (Tobacco Blackshank) was first discovered in Java, Indonesia in 1896 by Van Bredade Haan. Then it spread widely all over the world. At present, tobacco black shank is one of the most serious diseases in the world's tobacco production, and it is also the main disease in the tobacco planting process in my country. The pathogen is Phytophthora tobacco [Phytophthoraparasiticavar.nicotianae (BredadeHean) Tucker], Flagellate subphylum, Oomycetes, Peronomyces, Phytophthora. The source of primary infection in field stage and seedbed stage was mainly from diseased so...

AI Technical Summary

Problems solved by technology

Tobacco black shank is a soil-borne disease. At present, the prevention and control of tobacco black shank is difficult to control with a single control measure. Therefore, it is necessary to adopt crop rotation and plant disease-resistant varieties, strengthen cultivation management, and combine biological control and chemical control. Comprehensive measures of prevention and control will achieve better control effect