Apple trunk rot, also known as carcass rot, commonly known as black plaster disease, mainly harms the main and side branches and near the grafting interface of young trees, and can also damage the fruit.
Regularity: Apple trunk rot is a disease caused by fungi. The pathogen overwinters on the diseased branches, and the spores are transmitted by wind and rain in the following spring, and invade from the wound, dead buds and skin pores, and the pathogen has the characteristics of latent infection, and after invasion, it first grows on the dead tissue of the wound, and then spreads to the living tissue. The peak of onset was in August and October.
Control technology
Strengthen cultivation management. Enhancing tree potential and improving tree disease resistance are the fundamental measures for disease prevention. In order to prevent the disease of young trees, it is necessary to strengthen the management of nurseries to cultivate strong seedlings. The bud seedlings should be cut 15-20 days before germination, the wound should be disinfected with 1% copper sulfate, and then coated with Bordeaux solution for protection. When seedlings are planted, it is advisable to be flat with the ground at the grafting joint, avoid planting deep, and water enough to shorten the seedling delay time.
Scrape off lesions. The initial damage of dry rot is generally limited to the surface layer, and the lesions should be scraped and treated in time. After scraping, the sick part is disinfected with drugs such as fungus and poison clearing. Heavy scraping can also be used to eradicate the germs carried by the tree.
Pharmaceutical prevention and control. Before the germination of fruit trees, it is necessary to combine the prevention and control of other pests and diseases, and spray 5% fungus toxin clear or 2% pesticide 120 water agent 100 times solution or 3-5 Baumé stone sulfur mixture to protect the trunk.
How to prevent and control apple trunk rot is introduced here, I hope it will be helpful to everyone. If you want to buy high-quality and high-yield apple trees, you can download the Seed Bank App, and the country's excellent apple tree varieties are available for everyone to choose from.
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