Rice blast is the main disease of rice. It is caused by a kind of semi-permanent bacteria. Rice can be infected in the whole growth period. The disease can occur in the leaves, nodes, panicle neck, grain and other parts, common leaf aphid and panicle axillary two.
First, the characteristics of the disease: leaf aphid in the prolific period of childbirth and progesterone prone to occur, ear and neck clams are more likely to occur in the break period. In wet and humid weather, the disease is more prone to occur. Partial application, late application of nitrogen fertilizer, dry soil in the soil or cold water irrigation, lack of sunlight, and planting of susceptible varieties all contribute to rice blast disease.
Second, the prevention and control methods: (a) according to local conditions, selection of disease-resistant varieties. (b) Seed disinfection. Use Chunyu No. 1 and bacteria to aseptically disinfect, 1 grain of Chunyu No. 1 and 1 strain of bacteria are sterile, 15 to 20 kilograms of water, first pre-soak the rice seeds for 12 to 24 hours, wash the liquid after germination, and sow the seedlings after sowing. Qi, Miao Zhuang and Baigen are more effective in preventing rice blast, and can prevent and control other diseases. (3) Reasonably apply fertilizer and water. Apply basic fertilizers, increase phosphorus and potash fertilizers, prevent partial application, and apply nitrogen fertilizers later. It is better to use wet irrigation for water, and to dry it in time. (d) Chemical control. Prevention and treatment of leaf aphid should be used early in the disease. The panicle blast should be mainly prevention, and should be used once every time during the break period and heading period. One spring per acre with Chunyu No. 1 (or Chunlei) plus 2 sterile bacteria, or 1 per spring rain (or Chunlei) plus 20% tricyclazole WP 100 grams, or Chunyu No. 1 (or Chunlei) 1 Granules plus rice bran 60 to 70 ml, 50 to 60 kg of water spray, severe disease fields should be 7 to 10 days before spraying again.
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