Due to seasonal and rainy weather in recent days, the occurrence of fruit tree rot in this area is more serious in recent years.
Fruit tree rot disease occurs mostly on the trunk, main branches, and side branches, and sometimes the base of the main root is also affected. The onset of symptoms is that the bark of the diseased area is rotten and occurs mostly on the sunny side of the branches and on the branches. In the early stage of the disease, it was slightly immersed in water, and it was depressed. The outline was long oval. The diseased tissue is soft and bad, and the smell of distiller's grains is scattered, causing the death of the branches.
To prevent and control fruit tree rot, the following technical measures are mainly done:
1. It is necessary to scrape the lesions or remove the diseased branches in time.
For the early lesions on the main branches and side branches, the surface of the trunk skin was scraped off with a sharp scraper in time. Generally, it is necessary to scrape off the surface skin of 1 mm until the white-green skin is exposed. Pay attention to scraping the diseased tissue, and take the scraped diseased tissue out of the orchard and burn it. Severe diseased or dead trunks should be sawn off in time and taken out of the orchard to burn.
2. On the basis of scraping off the main stem and main disease tissue, spray a fungicide with a long-lasting and long- lasting effect to kill the latent rot bacteria on the bark to prevent the pathogen from infecting again. Sprayed pesticides can be used with methyl thiophanate 1000 times solution or chlorothalonil 1500 times solution or fruit Fukang 500 times solution. Applying sterilization measures should be applied to the wounds of the diseased tissue. The agent can be applied to the diseased department by using a 5-10 degree stone sulfur mixture or a 45% crystal stone sulfur agent 20 times solution or a fruit Fukang 10-15 times solution.
3. Strengthen cultivation and management.
Increase the application of organic fertilizer, suitable for topdressing. Reasonable scientific and fruit thinning, adjust the load and enhance the tree potential to improve the disease resistance of fruit trees.
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