Control Methods and Technical Key Points for Tobacco Black Shank
How to control tobacco black shank? Methods sought. The control strategy for tobacco black shank should be based on the use of resistant varieties, centered on strengthening cultivation management, and supplemented by chemical control. 1. Use resistant varieties. Among the varieties currently promoted, the more resistant ones include Zhongyan 90, Xujin No. 1, K346, K394, NC82, NC89, G...
How to control tobacco black shank? Methods sought
The control strategy for tobacco black shank should be based on the use of resistant varieties, centered on strengthening cultivation management, and supplemented by chemical control.
1. Use resistant varieties. Among the varieties currently promoted, the more resistant ones include Zhongyan 90, Xujin No. 1, K346, K394, NC82, NC89, G28, G80, K326, etc., which can be selected as appropriate.
2. Strengthen cultivation management. Reasonable crop rotation is one of the more effective control measures. Gramineous crops or sweet potato are better rotation crops. Ultra-high ridge cultivation is also recommended, with a ridge height of 30-40cm, so that surface runoff does not contact the base of the stem, reducing opportunities for pathogen infection. Raising seedlings early and transplanting early at the right time can allow the susceptible period to avoid the rainy season and reduce damage.
3. Chemical control. Before transplanting, 25% metalaxyl can also be sprayed so that seedlings are transplanted with the chemical. After hilling up the tobacco plants, in the early stage of disease, the following fungicides can be sprayed at the base of the stem: 58% Ridomil-MZ, 72.2% Previcur, 72% Sai Lu, 64% Sandofan, 40% metalaxyl-copper, etc., sprayed once every 10-15 days, for 2-3 consecutive times.
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