Apple mildew is a disease that damages the fruit when the fruit is close to maturity to storage, causing fruit mold, heart rot or early shedding. The control of apple mildew disease should adopt a combination of the growth and treatment of the growing season and the storage conditions under the storage period.
After removing the bacteria from the fungus, the fruit, fruit and leaves in the orchard should be removed in time. The dormant period is combined with winter pruning to remove the pests and branches and dead branches, reducing the source of overwintering bacteria.
Growth period of chemical control 1 flower bud expansion to the red stage, combined with prevention and control of apple powdery mildew, etc., can choose a permeable, therapeutically effective fungicide, such as: 30% diphenyl ether carbazole propiconazole suspension 1000-1500 times Liquid or 430 g / liter of tebuconazole suspension 2000-3000 times solution, 1.5% thiazolone water emulsion 500 times solution to remove the pathogen spores produced on the branches and dry branches.
2 At the initial flowering stage, choose a disinfectant that has no effect on the fruit setting to eliminate the germs on the flower. For example, 3% anti-mycin water 400 times solution, or 4% agricultural anti-120 water agent 600-800 times solution, 80% mancozeb WP 700 times solution.
3 young fruit period, this is the key period to prevent and cure mold heart disease, should choose the systemic fungicide 10 days after apple flowering, combined with prevention and control of apple ring disease, anthracnose, spray 430 g / liter of tebuconazole suspension agent 4000- 5000 times liquid, or 10% difenoconazole water dispersible granule 3000-4000 times liquid, 70% ethyl phosphorus aluminum manganese zinc wettable powder 1000 times liquid.
After harvesting, the fruits with poor hardness and lack of luster on the fruit surface should be removed and put into storage. If there are conditions, it can be pre-storaged in the warehouse at 10-15 °C for a short time. After the diseased fruit is removed, it is stored in the air-conditioned cold storage.
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