First, the law of occurrence of diseases (1) Apple rot disease is caused by fungal infection. Diseases caused by contagious spores spread by wind and rain. In case of high temperature and rainy weather, especially in the young fruit period, frequent sporulation of sporadic disease occurs in the diseased part. If the spraying is not timely, serious disease will occur. (2) The pathogenic bacteria are latent and usually infested in young fruit, and they are almost mature and storage period. Among them, anthracnose mainly occurs in the orchard, and the ringworm disease mainly occurs in the storage period. (3) Disease severity is related to meteorological conditions and tree vigor. Heavy rain occurs in the years of heavy rainfall and light incidence in drought years. Judging from the tree vigor, the incidence of weak trees is heavy, and the robust trees are lightly diseased, and the fruit is weaker than the robust trees. (4) There is a large difference in disease resistance among apple varieties. The Golden Crown, Green Banana, Red Star, and Fuji were among the most severely affected, and Guo Guang, Marshal, Zhuguang, Cockscomb, and Jonakin were among the most affected. Second, control methods 1, clear the source of overwintering bacteria. 1 In the autumn and winter, carefully remove the small knots, sick branches, and broken branches on the trees, and burn them together. 2 Thoroughly scrape off dry rot lesions and rotenia on the branches and disinfect the wounds with 40% Guo Kangbao 5x liquid or Corbett 2-5x liquid. 3 before the germination of the whole tree spray 40% Guo Kang Bao WP 100 times or 50-80 times Corbicum solution to prevent rotten fruit disease. 4 Do not plant hedgehogs and poplars near the orchard to prevent the spread of pathogens to fruit trees and aggravate anthrax and ringworm disease. 2, strengthen management to enhance the tree disease resistance. 1 Reasonable pruning, improve the ventilation and light conditions of the crown. 2 to avoid partial nitrogen fertilizer, pay attention to the reasonable application of nitrogen, phosphorus, potassium fertilizer, try to increase organic fertilizer, July-August orchard greening to enhance tree vigor. 3 Pay attention to irrigation when drought, in order to increase the nutrient storage capacity of the tree and increase the resistance to disease. The specific irrigation time was before freezing, before budding and flowering, after flowering, and during fruit expansion. 3, spray the appropriate period. The fungicide is sprayed once every 10-15 days, but the specific time depends on the amount of rain. Rain is sprayed more and rain is sprayed less. Drug types include fungicides, inhalants and protective agents, among them: 1 Dasheng M-45 is a high-efficiency bactericide, requiring spray before the rain, the protection period is about 10 days. 2 There are carbendazim, thiophanate and mancozeb in the internal absorbent. No rain is effective within 24 hours after spraying, and it must be sprayed when it rains. 3 Bordeaux solution is used as the protective agent. It must be sprayed within 3 days after the rain. If the liquid does not dry, it must be sprayed or sprayed with lime. Organic Wolfberry 220 Specifications Organic Bulk Wolfberry 220 Specifications,Bulk Red Wolfberry 220 Specifications,Natural Bulk Wolfberry 220 Specifications,Organic Wolfberry 220 Specifications NINGXIA STARLIGHT FOOD TRADE CO.,LTD , https://www.starlightfood.com
Prevention of apple rot disease
In recent years, apple rot fruit disease in Tongyi Town, Pulandian City, has been widespread, among which Fuji apple has a rotten fruit rate as high as 6.8% and Guoguang rot fruit rate is 0.57%, causing great economic losses to the fruit farmers. Based on the experience and lessons learned from the prevention and treatment of the disease in production, we propose the following prevention and treatment methods based on the occurrence and characteristics of the disease in the local area for the benefit of the majority of farmers.
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