How to "spray three precautions" in the later stage of wheat

The late growth stage of wheat is the main period for the occurrence of many kinds of diseases and insect pests, such as wheat aphid, wheat red spider, wheat leaf wasp, rust, powdery mildew, leaf blight, scab and so on. In order to simplify the operation, disease and pest control can be combined with foliar fertilizer, that is, the combined application of fungicides, insecticides and foliar fertilizer can have the effect of "one spray and three prevention" at the same time, such as disease control, insect control, dry hot air and so on. At present, the commonly used foliar fertilizers are 0.2% / 0.3% potassium dihydrogen phosphate solution, 0.2% Tianda 2116 plant cell membrane stabilizer solution and 1% / 0.3% urea solution. Foliar topdressing had better be carried out after 4: 00 p. M. on a sunny day, spray again every 7-10 days, and spray 2-3 times in a row. If you encounter rain within 24 hours after spraying, you should spray it again. To control wheat spiders, 0.9% avermectin EC 3000 times can be used to control wheat trematodes, during the peak period from wheat heading to the early flowering stage of wheat, 50% cypermethrin EC is used to spray 20ml / mu of cypermethrin EC to control the first generation of cotton bollworm; to control wheat aphid, 10% imidacloprid EC is used to spray 10g / mu and control gray planthopper To control sheath blight, 5% Jinggangmycin water can be sprayed at the base of wheat stem with 150 ml / mu of water and 75 kg / mu of water, and then sprayed again at intervals of 10: 15 days; to control powdery mildew and rust, 50% EC can be used to spray 50 ml / mu; to control scab, leaf blight and glume blight, 50% carbendazim wettable powder can be used to spray 75g / mu. The mixed occurrence of the above diseases and pests can be controlled by one-time mixed application of antifungal agents.