Selecting disease-resistant varieties according to local conditions. Thoroughly treat diseased rice straw before seedling stage to eliminate overwintering bacteria. Apply sufficient base fertilizer and skillfully apply topdressing, and the irrigation should be based on the principle of deep water turning green, shallow water tillering, sun jointing and late shallow water. Adding silicon fertilizer can effectively reduce the incidence.
(2) seed treatment.
Soak the seeds with 40% carbendazim wettable powder, 70% thiophanate-methyl wettable powder, 50% rice net emulsifiable concentrate and 40% ipratropium emulsifiable concentrate before sowing. Soak the seeds with 1000 times of liquid medicine for 48-72 hours for early rice and 500 times of liquid medicine for 24 hours for late rice.
(3) spraying drugs in the field.
Seedling blight occurred in 2 ~ 3 leaf stage, and 6% Daoling was used for control 1 time. When transplanting, soaking seeds with 25% EC 1500 times solution or 20% tricyclazole EC 750 times solution for 3 hours can effectively control rice blast. When the diseased leaf rate of the upper three leaves of rice plants reaches 3%, apply pesticide in time. In order to prevent ear blast, the first application should be carried out from ear breaking to ear beginning, and then the second application should be carried out at full heading stage according to weather conditions. 20% tricyclazole wettable powder, or 40% isoprothiolane EC, or 40% kewensan EC, 75 ~ 100g per mu, or 50% isoprothiolane EC, per mu 100 ~ 150g.