Citrus is an evergreen fruit tree, which has a long growing period and many types of pests and diseases. The number of sprayings is large throughout the year, which may lead to increased drug resistance, reduced natural enemies, and drastic increase in the cost of drugs and pesticide residues. Winter is an important season for controlling citrus pests and diseases. Citrus orange pests and diseases prevention and control are of great importance. The control effect is good, the cost of pesticides is reduced, and the fruit quality and benefits can be significantly improved. From November to the spring of the second year after fruit picking, the citrus and pests both enter the dormant period, the tree resistance is improved, and the resistance to diseases and insect pests is reduced. Through a variety of control methods and increased drug concentration, the control effect is improved. , A large number of sources of overwintering diseases and pests will be eliminated, which will have a multiplier effect for pest control in the following year. Citrus aphids, calf, scale insects, canker disease, and soot disease are the main types of citrus winter pests and diseases. At the same time, attention should be paid to the focus of prevention and control according to the occurrence of pests in the local production season. Pruning the garden combined with winter pruning, cutting off the branches and leaves of diseases and insects, and focusing on the eradication of diseased leaves, dead branches and fruit of scale insects, horny horny hornworms, gizidines, cankers and soot; comprehensive eradication of weeds and nearby hosts Plants, remove lichens, mosses, and dry piles thoroughly; extirpate the diseased plants of the yellow dragon, extirpate or saw dead trees or branches damaged by natural calamities, resinous diseases, etc.; remove the wintering swallowtails, leaf roller moths, codling moths, etc.蛹 刷 刷 刷 刷 刷 刷 刷 刷 刷 刷 刷 刷 蛹 蛹. Pruning the branches, leaves, and grass of the Qingyuan Garden must be burned to destroy the overwintering pests and overwintering sites. Fertilizing soil is carried out before the budding in autumn/winter till spring. The main soil is fertile soil, pond mud, river mud, field mud, turf mud and so on. It is planted around the tree plate and has a thickness of 2-4 cm and 15-20 tons per mu. . Autumn and winter soil, there is fertilizer, drought and water, improve soil permeability, promote root growth, restore the tree vigor. At the same time, there are also functions such as improving pest resistance, removing insects, eliminating grass and preventing cold. The deep tumbling of the whole garden through deep gardening can kill some of the larvae and dragonflies in winter, such as flower buds, weevil, or big fruit fly, and accelerate the decay of diseased tissue debris. After the garden is cleared in winter each year, deep-turning is performed in combination with the application of organic fertilizer. Deeply turning 20-30 centimeters around the crown, cutting off a few old roots, promoting new roots, and loosening the mature soil. For the red and yellow soils with soil acidity, 50-100 kg of lime are applied to the entire soil before deep-falling to neutralize the pH value and increase the soil calcium nutrients, effectively preventing the occurrence of physiological fluidic gum disease. Orchard antifreeze uses lime to add clay or cement to seal the trunk cracks, or Tianniu, Giardinus boring. Before the frost, the trunk was wrapped around the grass, the tree tray was used for soil cultivation, and the trunk was brushed white to prevent frost damage and resin diseases. Correction of the deficiency of the disease According to the diagnosis of soil nutrients and the observation of orchards all over the country, the red-yellow loam soil in the south often produces nutrient deficiency elements such as calcium deficiency and magnesium and trace elements such as zinc and boron. Applying magnesium sulfate, zinc sulfate, and borax in combination with fertilization in winter, combined with deeper application of lime to increase calcium, can effectively prevent the above deficiency diseases and increase fruit yield and quality. Other Dna Analysis Instrument,Gene Analyzer For Medical Use,Fully Automatic Gene Analyzer,Fragment Analysis Equipment Nanjing Superyears Gene Technology Co., Ltd. , https://www.superyearsglobal.com