Citrus fruit is an evergreen fruit tree, which has a long growing period and many types of diseases and insect pests. The number of sprayings throughout the year is high, which may lead to increased drug resistance, reduced natural enemies, and drastic increase in the cost of pesticides and pesticide residues. Winter is an important season for the prevention and control of 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. First, the period of prevention and treatment: Citrus fruit picking from November to spring shooter before the spring of February, this period of citrus and pests have entered a dormant period, increased tree resistance, resistance to diseases and insect pests, through a variety of control methods and improve The concentration of drug used to improve the control effect, a large number of sources of overwintering diseases and pests, to play a multiplier effect for the prevention of pests in the following year. II. Types of pests and diseases to be controlled: Citrus aphids, long-horned cattle, scale insects, canker diseases, and coal-fired diseases are the main types of prevention and control of winter diseases and insect pests in citrus. At the same time, the occurrence of diseases and pests in local production seasons should also be taken into consideration. Focus. Third, comprehensive prevention and control methods: 1. Trim the Qingyuan Garden: Combine the winter pruning, cut off the branches and leaves of disease and insects, and focus on the eradication of diseased leaves, dead branches and residual fruits of scale beetles, trichoderma, gizidines, cankers and soot; comprehensive eradication of weeds And the nearby host plants, thoroughly removing lichens, moss and dried piles; excavating the diseased plants of Huanglong, removing or sawing dead trees or branches damaged by Tianniu, resinous diseases, etc.; removing the wintering swallowtail butterfly, leaf roller moth, Codling moth and other insects, brushing off the overwintering moss on the branches. Pruning the branches, leaves, and grass of the Qingyuan Garden must be burned centrally to eliminate overwintering pests and overwintering sites. 2, fertilizer fertilization: in the fall and winter before the budding, with dry fire soil, pond mud, river mud, mud, turf mud and other fertile soil, cultured in the tree around the thickness of 2 to 4 cm, 15 per mu ~20 tons. 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 increasing pest resistance, removing insects, eliminating grass and preventing cold. 3, the whole park deep turn: Through the deep gardening, you can kill the soil in the winter flower buds, larvae and maggots, such as part of the larvae, and speed up the decay of diseased tissue debris. After the garden is cleared in winter each year, deep-turning is performed with the organic fertilizer application. Deeply turning 20-30 cm 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 plowing to neutralize the pH value and increase the calcium nutrients in the soil, effectively preventing the occurrence of physiological fluidic gum disease. 4. Orchard antifreeze: Use lime to add clay or cement to seal the trunk cracks, or Tianniu and Giardinus bore holes. 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 disease and other diseases. Trunk whitening agent configuration method: 15 to 20 kg of lime, 0.25 kg of salt, lime sulfur solution 1 kg of water plus 50 kg configuration. 5, correction of deficiency syndrome: According to soil nutrient diagnosis and observation of orchards around the country, southern red and yellow loquat citrus often produce calcium deficiency, magnesium and zinc, boron trace elements and other nutrient deficiency symptoms. Applying magnesium sulfate, zinc sulfate, and borax in combination with fertilization in winter, combined with deep application of lime to increase calcium, can effectively prevent the above-mentioned deficiency diseases and increase fruit yield and quality. 6. Spraying and spraying gardens: The whole park sprayed boiled lime 1 to 1.5 degrees lime sulfur or 45% commercial lime sulfur crystals 180 to 300 times liquid to eliminate overwintering pests and reduce the source of overwintering. For citrus plants with serious harm to the locusts, they should be sprayed once with 12 to 15 times liquid of pineine mixture or tea dried pine oil mixture, or 100 to 200 times of 95% oil emulsion. In the winter, the park spraying should be evenly and thoroughly sprayed, and the spray amount should be sprayed on wet branches and leaves of the crown and not dripping. The pineine mixture should be used alone in the production of strong alkali, and it cannot be mixed with pesticides such as organophosphorus pesticides and lime sulfur, and it can only be applied after spraying for 20-30 days. Medical Plaster,Plasters Sprain Plaster,Plaster For Injury,Waterproof Plaster Patch Puyang Degren Medical Equipment Co., Ltd. , https://www.degrenyuwei.com