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Before and after the flowering of fruit trees in spring, it is a great opportunity to control pests and diseases. Because this season, various germs and pests began to become active after a winter dormancy, the resistance to drugs was poor, and the leaves did not germinate, there was no shelter, the application was convenient, and fruit trees did not produce phytotoxicity. The “medicine bath†should be promptly performed. Prevention. Pre-harvest control 1. Sprinkle Bami 5 degree lime sulfur in time to control rot disease and inhibit the wintering propagation of red spider. It has a significant effect on the control of bronchitis, leaf curl insects and scale insects. It can also spray 40% of Asabe 100 times liquid. 2. Control after germination. Orchard general spray one time 150 to 200 times 45% crystal rock scum or spray wave 0.3 degree lime sulfur plus 50% 1605 cream 1000 times. It can kill more than 90% of the red spiders and the spores of powdery mildew, defoliation, and other pathogens that have been overwintering in buds, and can also control scarabs and aphids. 3. Control after germination and before flowering. Spray 1500 times 50% of 1605 or 80% dichlorvos 1200 ~ 1500 times liquid, enemy killed and chrysanthemum pesticides 2500 ~ 3000 times liquid. It has obvious control effect on pests and rot diseases. Post-harvest control 1. After the flowering, the 0.3-0.5 Baume degree lime sulfur agent can be used to prevent leaf disease and spider mites. Can also spray 2500 ~ 3000 times of kung fu, extinction sweep, can prevent red spiders and kill leaf insects, pest eggs. 2. Bordeaux mixture (1 kg copper sulfate, 4 kg quick lime, 20 kg clear water) or 40% carbendazim and 600 to 800 times tetromycin can be sprayed within 10 to 15 days after flowering. Prevention of the occurrence of leafy disease, anthrax, and brown-blight disease that are prone to high temperatures and high temperatures. 3. Use of thiamine and dichlorvos is strictly prohibited within 1 month after flowering.