To prevent and treat apple anthrax in time during the rainy season
Apple anthracnose pathogenic bacteria in mycelium branches in the branches of the dead branches and frozen fruit overwintering, by insects and wind and rain to spread, the early onset, the fruit surface appears light brown blister small round spots, and quickly expanded. The northern region can take place from June to September, and the period from July to August is the peak period, especially when high temperatures occur after rain. Poorly drained orchards and trees with weak trees are early and heavy. Prevention and treatment should pay attention to the following aspects:
Timely removal of pathogens combined with winter pruning to do a good job in the clear garden, seriously clear the tree's stalemate, dead branches and so on. During the growing season, the early stages of disease are removed in time to prevent the repeated infection of pathogens.
Strengthen the cultivation and management efforts to improve the orchard's ventilation and light conditions, timely drainage in the rainy season. Increase organic fertilizers and control the amount of fruit to increase tree vigor and increase disease resistance. At the same time pay attention to the application of foliar fertilizer, especially calcium indispensable, according to many years of experience, under the conditions of adequate calcium supplement, apple anthracnose relatively reduced.
Prevention in advance is mainly prevention before bagging. Before the germination of fruit trees, spraying “sterilization is strong†(12% myclobutanil) 1000 times, has a good effect on reducing the source of overwintering bacteria. The growth period generally starts from about 10 days after flowering and begins spraying control. After entering July, it will give priority to the central diseased plants and severe wards, and continuously spray 3 to 4 times. The specific spraying period depends on the rainfall conditions, adhere to spraying after the rain, rain and more rain, spray less rain.
Commonly-used pharmaceuticals include 800-fold solutions from Mebond Corp., 1000-fold solution from "Ai Mu" (70% thiophanate-methyl), 1000-fold solution from Bing-Sendo, or 1000 times of "Anti-microbial" (72% of Fortune Zinc). Once in ten days. In order to balance the control of other diseases, the top (80% tebuconazole water dispersible granules) 8000 times solution can be added at the same time.
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