How to prevent and cure apple rot in summer?

How to prevent and cure apple rot in summer? Please introduce the methods for the prevention and control of apple tree rot. For many years, attention has been paid to the prevention and control of apple tree rot in spring, ignoring the prevention and control in summer and autumn, resulting in a high recurrence rate of the disease and can not be completely cured. However, according to the incidence law of the rot disease, the first scraping treatment in spring is changed to summer and autumn prevention and cure, combined with spring control, and bridging the big disease spot, a good control effect can be obtained. The main results are as follows: 1. The pathogen of apple rot is a weak parasitic fungus, overwintering on the bark with mycelium, conidia and molecular spore horn, and the spores are spread by Rain Water spatter. Summer is the active growth period of apple trees, which is not conducive to the expansion of pathogens, but the dying tissues in the cortex and other parts create good conditions for the spread and infection of rot, and the bacteria invading the bark form very small epidermal ulcer spots after this expansion. When the tree entered the dormant period, the living ability decreased, the incidence accelerated, a small incidence peak appeared, the symptoms were obvious, but the deep rest period expanded slowly. 2. Control countermeasures according to the characteristics of bacterial spores transmitted by Rain Water in summer, after scraping off the dying tissue of fallen cortex, dried trees and branches of diseases and insect pests in summer and autumn, apply 50 times 4% agricultural antibiotic 120 fruit tree type liquid to eliminate the latent infection base of pathogens. Combined with the prevention and control of other diseases of fruit trees, 4% agricultural resistance 120 fruit tree type 600-800 times liquid or 1RV 2VL 200 times Bordeaux solution 3muri 4 times a year are carefully sprayed to eliminate pathogens in the latent infection period and fundamentally control the incidence of dormancy period. The second is to smear 50 times 4% agricultural antibiotic 120 fruit tree type or 9281 or 834 rehabilitation agent after scraping the disease spot in spring. Apply loess mud on the disease spot, about 1 cm thick, and then wrap it tightly with plastic paper (about 10-15 cm wide). Generally, the disease spot falls off after 3 months, and callus is produced around it. Strengthening the tree potential and improving the disease resistance are the fundamental measures to control the rot disease. Reasonable adjustment of fruit amount: improve site conditions, implement scientific fertilization; autumn control spring irrigation, reasonable irrigation; timely control of early defoliation diseases and insect pests, timely control of root diseases to achieve the purpose of disease prevention of strong trees. It is difficult to fully heal the serious disease spot bridging the big disease spot in a short time, which seriously affects the nutrient transport of the tree. Therefore, the bridging treatment should be carried out in time after scraping, which is beneficial to restore the tree potential and prolong the life span. Click to get more apple tree planting techniques click to get more fruit planting techniques