Targets for prevention and control: fruitworm, leaf roller moth, leafhopper, stink bug, white beetle chafer, scab, bacterial perforation, brown rot. Prevention measures: 1. Strengthen the summer pruning to make the trees airy and transparent. 2. Manually capture the red neck beetle and dig its larvae. Trapping white star flower chafer. 3. To control hawthorn leafhoppers and two-leafhoppers, spray 1% avermectin EC 5000 times or 1.8% ESPN 4000-6000 times. 4. Spray fungicide once every 10 to 15 days, control brown rot, scab, anthrax, and perforation, 70% mancozeb WP can be used 500 to 600 times, 70% thiophanate-methyl 1500 times, 80% WP WP 800 times, 80% DM m-45 WP 800 times or 1% Bacterine 200 times. 5. In the middle of June, spray 20% urea-urea emulsifiable concentrate 8000-10000 times, 25% buprofezin WP 1500-2000 times (or 50% chlorimuron EC 1000-1500 times), 2.5% time Emulsion 3000 times (or 20% chloramphenicol 3000 times) to control the heartworm, scale insects, stink bugs, leaf roller moth and so on. 6, enter the booming growth season, prone to deficiency of disease, can be used to supplement the nutrients required to spray fertilizer. 7, protect and use various natural enemies resources.