What are the main rice pests and diseases? Common types at a glance
How to raise rice seedlings well? Methods wanted. Rice seedling-raising techniques: 1: How to determine the seedling-raising period? For insulated dry seedling-raising of rice, start raising seedlings and sowing after the air temperature steadily passes 5°C-6°C (after covering with plastic film or greenhouse film, the temperature rises above 12°C). In Heilongjiang Province, this is generally in mid-to-late April; do not sow in May. The best sowing period is April...
What are the main rice pests and diseases? How can they be effectively controlled?Rice mainly has the following pests and diseases:
Rice blast: Prevent seedling blast at the 3-4 leaf stage of seedlings, prevent leaf blast at the peak tillering stage in late June, and prevent neck blast at the breaking stage in late July and early August. Use 60-100 grams of 40% isoprothiolane wettable powder or 100-150 grams of 25% tricyclazole wettable powder per mu, mix with water and spray, focusing on preventing neck blast.
Sheath blight: Control the amount of nitrogen fertilizer, irrigate frequently with shallow water, and dry the field moderately to enhance the plant's disease resistance. At the peak tillering stage, use 150 milliliters of 5% jinggangmycin aqueous solution or 100 grams of 50% thiophanate-methyl per mu, mix with 50 kilograms of water and spray evenly on the middle and lower parts of the rice plants, then treat again after 7 days.
Rice false smut: Choose disease-resistant varieties. Apply formula fertilization and avoid excessive nitrogen fertilizer. 5-7 days before breaking and heading, use 100 grams of 16% "Xianba Rice Harvest" wettable powder or 100 grams of 15% triadimefon per mu, mix with 50 kilograms of water and spray on the panicles, then spray again after 7 days. It can also control sheath blight and neck blast at the same time.
Chilo suppressalis: 5-7 days after transplanting, spread 1.5-2.0 kilograms of 3.6% bisultap granules per mu together with topdressing. In late July and early August, pay attention to pesticide application as part of the "two preventions and one spray" to reduce insect-damaged plants and avoid large-scale lodging of the plants.
Rice locust: Before transplanting in the field, carry out control well in the seedling nursery field. 7-10 days after transplanting, use 150 milliliters of 25% bisultap aqueous solution per mu, mix with 50 kilograms of water and spray. It can also control early-stage borers at the same time.
Rice skipper: In late July and early August, carry out selective treatment on rice fields with dark green leaves and delayed maturity due to excessive vegetative growth. Use 100-120 grams of 90% trichlorfon crystal per mu, mix with water and spray. After full heading, stop applying all pesticides and fertilizers to ensure the safety of rice for consumption.
Rice leaf roller: When individual leaf tips are found rolled up in the field, control should be carried out promptly. Use 200-250 milliliters of 18% bisultap aqueous solution or 100 grams of 90% trichlorfon crystal per mu, mix with 50 kilograms of water and spray. Spraying in the evening is preferable.
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