How to control diseases and insect pests in rice?

How to control diseases and insect pests in rice? When does it start? Rice planthopper, rice leaf roller and panicle neck blast occurred greatly, while rice stem borer, sheath blight and rice false smut occurred moderately in the second generation. Prevention and control work should adhere to the strategy of "pressing the front and controlling the rear, treating the small early is the comprehensive control of early prevention". Focus on four key battles: the first: in the first and middle of July, the main targets of prevention and control were the second generation rice planthopper and the second generation rice leaf roller. When the number of rice planthoppers reached 100, the fields with more than 1200 insects were immediately treated with quick-acting pesticides such as chlorpyrifos and isoprocarb, and the recommended insecticides were used 7 days after the emergence of adult moths in the field (or more than 60 moths per mu). The second time: from late July to early August, the main control objects were the third generation of rice planthopper, the third generation of rice leaf roller, the second generation of Chilo suppressalis, and the treatment of sheath blight. Before July 25, fipronil and thiazinones were widely applied in all the paddy fields in the county, and the fields of the second generation Chilo suppressalis, rice planthopper and rice leaf roller exceeded the standard after application, and quick-acting pesticides were used for emergency control. Combined with pest control, the fields with severe sheath blight should be treated with Jinggangmycin. The third time: the rice break period (early and middle August), the main object of prevention and control is panicle neck blast and rice false smut, pay attention to the emergency control of rice planthopper and rice leaf roller. Tricyclazole + Jinggangmycin + triadimefon or rice amide or love seedling EC were applied once at the breaking stage of rice (the simple judgment method was that there was one ear outcrop per seedling) to prevent neck blast and false smut. If Rain Water is more, apply Fuji No. 1 or Fuji No. 5 + triadimefon again at full heading and flowering stage. The occurrence of panicle neck blast is very serious in our county all the year round, and the harm is great. Medication prevention in the break stage is the key measure to control panicle neck blast, which must be paid great attention to. The fields of rice planthopper and rice leaf roller exceeding the standard should be urgently controlled by quick-acting chemicals. The fourth time: from late August to early September, the main control object was the fourth generation of rice planthopper, and emergency control was carried out in the fields with high amount of rice leaf borer. Fields with more than 5000 rice planthoppers should be drained, sprinkled with 80% dichlorvos 400ml mixed with fine soil and sprinkled with 30kg of fine soil. A day later, water will be returned, and spray control will be carried out as appropriate. The sale and use of five highly toxic organophosphorus pesticides, including methamidophos, parathion, methyl parathion, monocrotophos and ammonium phosphate, are completely prohibited; the use of imidacloprid and its compound preparations and pyrethroquinone pesticides and their combinations are prohibited in rice fields; acetamiprid and its compound preparations are not recommended, and triazophos and its compound preparations are not recommended. The following medicament control is recommended. Control of rice planthopper: long-term efficacy agents: buprofezin (Chuanshanling, Propofol, Youlode, Saiwang), valid for 25-45 days; thiazine (Aktai), valid for 25-30 days, Pyrazidone (Feidian), valid for 40-45 days. The efficacy of the above long-acting agents is slow, and it has high killing effect on young nymphs and eggs, so it should be applied in rice planthopper egg incubation stage and low age nymph stage. Quick-acting pesticides: chlorpyrifos (Tongshun, Lesbon, Xinnongbao), isoprocarb (leaf cicada powder), dichlorvos, mainly used in serious rice planthopper fields, are the main pesticides for emergency control. Concurrent control agents: fipronil (fipronil) is mainly used to control the second generation of Chilo suppressalis on rice. It has a good effect on rice planthopper and has a long period of validity. Control of rice leaf roller: Probophos (chlorophos, Kulong), chlorpyrifos (Tongshun, Lesbon, Xinnongbao), avermectin (blue sharp), fluoronitrile-chlorpyrifos (Qiji) and chlorobenzamide (Kangkuan), etc., should be used from the peak of egg hatching to the second instar larvae to control advanced instar larvae, and the above pesticides can be mixed to enhance the insecticidal effect. Tricyclazole, Fuji No. 1 and Fuji No. 5 are recommended for the control of rice blast (including panicle neck blast), and Jinggangmycin + triadimefon, rice amide and Aimiao EC are recommended for rice false smut control. Rice amide and Aimiao EC have good control effect on neck blast at the same time. Click to get massive rice planting technology click to get massive grain planting technology