Winter Control of Diseases and Pests of Fruit Trees
Fresh White Garlic,Fresh Garlic,White Garlic Rich Farmer International Trade Co., Ltd. , http://www.jnfreshfruit.com
In winter, pests of all kinds of fruit trees are in a dormant period, and comprehensive prevention and control of diseases and insect pests in fruit trees will be strengthened, which will reduce the overwintering base number of disease and insect pests in fruit trees, reduce the amount of prevention and treatment in the following year, and ensure high yield and quality of fruits. First, tying the grass in the fruit tree before the winter to tie the grass, lure the insects to the grass to lay eggs in the winter, to the deep winter after the solution to burn off the grass. It can eliminate a large number of pests and eggs that overwinter in the grass. 2. Turn over the orchard to deepen the soil, and kill the pests in winter through the cold and drought to achieve the purpose of extermination. Generally, the depth of the garden is 30-40 cm. The better the time is, the closer it is to soil freezing. At this time, the pests have entered a dormant state and cannot be re-entered into the winter. Third, scrape the saying: "eat pears, scrape bark." This is because many diseases and pests that damage fruit trees such as rot, ring rot, red spider, etc., survive winters in cracks in the rough skin and scrape the bark in winter to remove these diseases and insect pests. Practice has proved that it is best to scrape the rough skin in the early fall and winter, so that the pests can be eliminated in the early stages of wintering. The degree of scraping the skin, the general grasp of small trees and weak trees should be light, big trees and Wang trees should be heavy principles, the light only scraped dead dry skin, severe scraping to the cortex yellowish green appropriate. After shaving, the rough skin is buried or burned. Fourth, the Qing is the clear garden. Some diseases and insect pests of fruit trees often overwinter in weeds and deciduous trees, or they can overwinter in diseased branches, fallen leaves, fallen fruits, and frozen fruits. Therefore, after deciduous fruit trees, weeds, fallen leaves, fallen fruits, and diseased branches in the orchard should be promptly removed and buried or burned. Fifth, shearing combined with winter pruning, cut off those with pests and diseases of branches, such as diseased branches, stamens, etc. to conduct a thorough pruning, cleaning and concentrated burning after cutting. In addition, various aging fruit branches and branch groups that have been growing for many years are also potential sites for wintering diseases and insects, and should be rejuvenated in a timely manner. 6. Spraying is usually done after pruning the fruit trees and before the sprouting of fruit trees in early spring. It is best to spray twice. A 3-5 degree lime sulfur agent can be used, requiring the trees to be sprayed on the ground. This will not only protect the wounds and branches, but also eliminate some of the pests that have passed through the winter in trunks and soil. VII. Coated trees with white coating can reduce sun burning and freezing injury, delay germination and flowering of fruit trees, avoid the danger of late frost, and can also treat trunk diseases and pests, that is, killing pests that overwinter in skin joints. The proportion of whitening agent can be as follows: 10 parts of quicklime, 2 parts of lime sulfur, 1-2 parts of salt, 36-40 parts of water, and a small amount of pesticide. Whitening time is best twice, first after falling leaves and before the soil freezes, and the second time in early spring. The main part of the white painted area is the main trunk, the main branch, the base of the main branch, the south of the trunk, and the sunburst on the tree fork. Pay attention not to apply it to the bud to prevent burning. The whitening agent should be dry and dilute properly so as not to be lost during coating. After drying, it is not necessary to fall off or fall off.