According to years of production and practice surveys, fruit tree pest control in winter is very important. In winter, most fruit trees are in a dormant period, and management and spraying of pesticides are well done . For the prevention and control of pests and diseases, it is very important to avoid and alleviate the harm of the pests to the fruit trees. It is necessary to highlight the following aspects:
1. Remove the fallen leaves and cut off the branches of the disease. Overwintering sites such as apple brown spot, gray spot and pear scab are in the leaves and weeds. By sweeping, it can play a role in eliminating the pathogens of wintering. Most of the pathogens of apple anthracnose, grape white rot, and peach brown rot overwinter on the fruit. The larvae of the pear moth and the apple leaf-rolling moth are overwintering on the shoots, and can be effectively eliminated by combining pruning in winter. These wintering pests and diseases, and the cut pests and diseases are brought to the orchard to burn. Alternatively, use a suitable fungicide pesticide for control, and the specific formula can be queried on the pesticide information online.
2. Deeply turn the fruit and winter irrigation. Through the ploughing of the soil in the fruit, the bacteria and pests that overwinter on the ground are turned into the ground, and the pests that overwinter in the soil are exposed to the soil surface, and the purpose of eliminating pests and diseases can be achieved through the severe cold and drought in winter. The depth of ploughing should be about 30 cm. Orchard irrigation in winter can cause a sudden drop in soil temperature and oxygen content, which is very beneficial for killing root eggs and reducing the degree of emergence of alfalfa.
3. Scrape bark and white. After the leaves, apples, pears, rots, ring rot, pear worms, apple larvae and larvae and adults of red spiders of the hawthorn, mostly overwinter in the rough skin and cracks of the trunk. Scrap off the rough skin, skin, and skin, and receive good results in controlling pests and diseases. It is best to scrape the skin in the late fall and early winter, the skin scraping depth is scraped with rough skin and skin, and the light brown skin layer is suitable. When scraping the skin, a plastic sheet is placed under the tree to collect the scraped bark to bring out the orchard to burn. After scraping the skin, the trunk is painted white, on the one hand, it can kill the pests that overwinter in the bark seam, and on the other hand, it can prevent the plants from being damaged by freezing. The whitening agent formula is: 10 parts of quicklime, 5 parts of stone sulfur mixture, 2 parts of salt, 30 parts of water, and a small amount of insecticide. Apply the trunk and the lower part of the main branch, and strive to be even. It is better to apply white twice, once in the late autumn to early winter, and another in the late winter to early spring. Whitening should be carried out on sunny days, and whitening rain and snow will reduce the effect.
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