Qing is the Qingyuan. Some pests and diseases of fruit trees often overwinter in weeds, deciduous leaves, dead branches, fruit falling, and dead fruits. Therefore, after the leaves of the fruit trees fall, the weeds, fallen leaves and dead branches of the orchard should be removed in time, and the wells should be buried or buried. burn.
Turning over is the ploughing orchard. The wintering pests in the soil can be frozen to the surface or killed, or eaten by birds and other natural enemies. Tilling orchards can be combined with organic fertilizer application. Generally, the depth of the garden is 30-40 cm. The better the time is, the better the freezing effect is. The pests have entered the dormant wintering state and cannot re-enter the winter.
Scraping is to scrape the bark. Because many of the pathogens and pests that damage fruit trees are wintering in rough skin cracks and winter bark, they can be removed. Practice has proved that bark scraping is best carried out in the late fall and early winter, which also eliminates the pests and diseases in the early winter. The degree of scraping the skin generally grasps the principle that the small tree and the weak tree should be light, the big tree and the wan tree should be heavy. The lighter only scrapes the dead rough skin, and the heavy one scrapes to the cortex and the yellowish green is suitable. After scraping, the rough skin is collected and buried or burned.
Cut and combine winter pruning, cut off those branches and dead fruits with pests and diseases, and burn or bury them deeply.
Spraying is usually carried out after deciduous fruit trees and before germination with 80-100 times of arsenic arsenic and 30 times of crystal stone sulphur mixture. It is best to spray twice. Spraying requires the ground to be sprayed on the tree, which not only protects the wounds and branches, but also eliminates some of the pests that overwinter in the branches and soil.
It is painted white. It can reduce the sunburn and freezing damage and the pests and diseases that survive the winter under the trunk of the trunk, which can delay the germination and flowering of the fruit trees and avoid the harm of night frost. It is better to apply white twice, the first time after the leaves and before the soil is frozen, the second time in the early spring. The whitening agent formula is: 12 parts of quicklime, 1 part of salt, 3 to 4 parts of clay, 1 part of stone sulfur, and 25 to 30 parts of water. The white-coated part is mainly composed of the trunk, and the main branch, the base of the backbone branch, the trunk of the trunk, and the branch of the trunk are mainly coated. Be careful not to apply it to the bud to avoid burning the bud. It is advisable to apply the white concentration so as not to flow or dry. (Hengcheng City Taocheng District Forestry Bureau) Zheng Yi "Hebei Science and Technology News"
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