First, change the focus of prevention and control link Rot disease in the incidence of rot disease has two peaks in spring and autumn, especially in spring, autumn depending on the year (mainly the number of precipitation) and a small peak, but the rot disease like a cold seedlings, no Not at all. The fundamental link in combating rot disease is to do a good job of prevention and control during infestation, and the main infestation period in production is in autumn. Due to the incompleteness of spring prevention and control—the recurrence of old lesions and the new infection of pathogenic seedlings are the causes of the rise of infection in the fall or the main pathogenic link. This is in contrast to the current producers who only focus on spring prevention and control and neglect the autumn control. Direct relationship. Before and after the harvest of autumn fruits, due to suitable weather conditions (mainly temperature), and autumn rain and fog, a large number of spores divide, disperse, and germinate. At the same time, the tree nutrients are mostly transformed into the fruit and the tree resistance is In the weaker stage, the inevitable wounds during the collection period and the neglect of chemical control resulted in a large number of bacterial infections. Second, improve the prevention and control technology 1, increase the level of tree nutrition, improve disease resistance. The orchard should pay attention to balanced formula fertilization, reasonable load, protect the leaves, increase the nutrient level of the tree reserve and so on. 2, strengthen the autumn chemical control. After the orchard enters the autumn, it is necessary to strengthen the targeted chemical control after the shoot growth period to the harvest period. During this period, it was mainly sprayed with 50 times solution of chlorhexidine, 800 times solution of thiophanate-methyl, and 78% of Kebo 500 times solution. At the same time, pay attention to early basal fertilization in the orchards in autumn, and harvest them appropriately in the late evening and late winter. 3, combined with spring curettage. Before the onset of the peak in spring, it is necessary to completely cure the lesions and eradicate the bacteria. From March to April, the lesion was treated by George. First, the disease was completely scraped with a knife. The necrotic tissue of the diseased part and the healthy tissue connected to about 5 mm were carefully shaved, deep to the edge of the essential part and cut into the main part. Spindle-shaped, is conducive to the healing of lesions, timely application after scraping, can be used agricultural anti-120 agent 10 times liquid: the second is to draw, with a knife in the disease on the straight, knife distance 1 cm, both ends Deep to the xylem, both sides beyond the lesions 2-3 mm, after the strips painted agricultural resistance 120 or rot must clear. 4, tracking the treatment of lesions during the growing season. For large lesions, multi-arbitrary trees in the spring after curettage, the growth season follow-up treatment, and then the disease re-scrape treatment, rot must be cleaned 3-5 times liquid or 843 recovery agent stock solution until cured. Third, pay attention to 1, pharmaceutical control. During the growing season, the use of Formamide is avoided when following the treatment of recurring lesions in order to avoid the occurrence of phytotoxicity in the trees. The application of Corbett or 843 rehabilitative agents is recommended, especially for Coral Clearance. 2. Scratch treatment of lesions should be detailed and comprehensive, and remove bacteria source tissue (concentrated burn after receiving). 3, combined with winter cut, pay attention to clean up the decayed shoots. 4. Good prevention and control in the autumn, together with the prevention and treatment in the spring, after 2-3 years in a row, it can fully control its incidence and restore the overall landscape. 5. It is the basis of prevention of rot disease that enhancing the disease-resistance of the tree body from the perspective of fertilizer, water and load.
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