1. In the current prevention and control of brown planthopper, in order to improve the anti-effect, chlorpyrifos can be mixed with buprofezin (Pu Lingling) and Ruijinte to improve the contact, insect poisoning and fumigation of brown planthopper pests. 2. In the late stage of rice use, it is necessary to pay attention to the amount of spray. In the case of the recommended dosage per acre, the dosage should be increased or decreased with the spray liquid. In the later stage of rice, the upper limit of the dosage should be recommended. The sprayer of manual sprayer should be more than 50 liters per acre, and the sprayer of the stretcher-type motorized sprayer should be more than 300 liters per acre. 3. Obey the safe use rules of pesticides and do a good job in labor protection. 4, grain mulberry mixed plant area, should be careful to use drugs away from the sericulture area to avoid contamination of mulberry leaves and silkworm poisoning by rice fields. Shangqiu Haoyu measuring tools Co., Ltd , https://www.sqhaoyutools.com