Prevention and Control of Diseases and insect pests in kiwifruit Orchard in Winter

With the expansion of kiwifruit cultivation area and fruit-hanging area, the occurrence and harm of diseases and insect pests are becoming more and more serious. The prevention and control of diseases and insect pests in kiwifruit orchard in winter can achieve twice the result with half the effort in promoting the transformation of tree potential, the control of diseases and insect pests in spring and summer and the healthy growth of kiwifruit trees. According to the investigation of our station in recent years, the main diseases found in kiwifruit are canker, bacterial flower rot, root-knot nematode, root rot, leaf blight, black spot and so on. The main pests are beetle beetle, spotted wax cicada, bugs, small salary beetle, red spider, peach borer, leafhopper, cricket and so on. After kiwifruit picking at the end of autumn, the trees need to rest and fatten up to enhance their overwintering resistance. After falling leaves should be combined with deep turning, pruning, removal of dead branches and leaves, weeds and spraying chemicals to achieve the purpose of effective control. The main diseases of kiwifruit are all dormant in winter, parasitic in diseased branches, fallen leaves and rotten fruits, which can be combined with winter shearing to remove diseased branches, insect branches, fallen leaves and fallen fruits in the garden and bury or burn them deeply. This can effectively eliminate pathogens such as canker, leaf blight and black spot, and reduce the source of infection. The prevention and control of root-knot nematode can be combined with deep ploughing before winter to remove the diseased roots and fine root masses of 5cm and 15cm in the topsoil of diseased plants, remove the disease residue, reduce the pathogen and reduce the harm. Root rot can be caused by wound infection caused by underground pest grub, ground tiger and so on. Therefore, soil medicament treatment can be combined with deep ploughing to eliminate its underground larvae and pupae. Soil treatment with 3% carbofuran 3 kg per mu can not only eliminate root-knot nematodes, but also eliminate underground pests, reduce the overwintering base of pests, and greatly reduce the harm in the coming year. In kiwifruit orchards with severe canker disease, on the basis of winter scissors clearing the orchards, stone-sulfur mixture of 0.3-0.5 Baume was sprayed twice and Bordeaux solution of 100 Bordeaux was sprayed for comprehensive control. Shell insects often spend the winter on tree trunks and branches. In winter, rags, grass handles, bamboo brushes and other tools can be used to wipe the dense overwintering insect sources and reduce the insect population in the coming year. The insect branches on the vines can be removed with winter pruning. Leafhoppers and bugs lay eggs in weeds and withered leaves or adults overwintering, which can be combined with garden cleaning and weeds eradication, so as to eliminate overwintering adults and eggs. While pruning and clearing the garden in winter, eradicating weeds and turning deep into the soil, comprehensive prevention and control of diseases and insect pests can be carried out in a targeted manner, and the best control effect can be obtained.