What are the main diseases and insect pests of rice?

What are the main rice pests? How can it be effectively prevented? Rice mainly has the following diseases and insect pests: rice blast in seedling 3-4 leaf stage, leaf blast in late June, ear neck blast in late July and early August. 60- 100g of 40% isoprolol WP or 100- 150g of 25% tricyclazole WP are sprayed on water per mu to control panicle neck rice blast. Rhizoctonia sheath blight control nitrogen dosage, shallow water frequent irrigation, moderate sunning field, enhance plant disease resistance. At the tillering stage, 5% Jinggangmycin aqueous solution 150ml or 50% thiophane methyl 100g was used per mu, 50kg water was sprayed evenly on the middle and lower parts of rice plants, and the control was repeated once every 7 days. Rice false smut disease selected resistant varieties. Apply formula fertilization and avoid partial nitrogen application. 5-7 days before heading, spray 100g of 16%"Xianba Rice Harvest" WP or 100g of 15% triadimefon on the ear with 50kg of water, spray once every 7 days, and it can also control sheath blight and ear neck blast. 5-7 days after transplanting Chilo suppressalis, 1.5-2.0 kg of 3.6% dimehypo granules are applied per mu in combination with topdressing. At the end of July and the beginning of August, pay attention to the application of "two preventions and one spray" to reduce insect damage to plants and avoid large-scale lodging of plants. Before rice locust transplanting in field, do a good job in the control of seedling mother field. 7-10 days after transplanting, spray 50 kg of water with 25% bisultap 150 ml per mu, which can also treat early borers. At the end of July and the first ten days of August, rice bracts are selected and treated with 100- 120g of 90% crystal trichlorfon sprayed on water per mu. After full heading, stop applying all kinds of medicine and fertilizer to ensure the safety of rice eating. When rice leaf roller is found in the field, individual leaf tips should be controlled in time. 200-250 ml of 18% dimehypo solution or 100 g of 90% crystal trichlorfon can be used per mu, and 50 kg of water can be sprayed. It is better to apply it in the evening. Click to get mass rice planting technology Click to get mass grain planting technology