The meteorological diseases of kiwifruit can be broadly divided into high temperature and drought, floods, sunburn, strong winds, and low temperature damage. These natural factors directly affect the reproductive growth of kiwifruit, resulting in a decline in yield and quality, and require attention and prevention. First, the prevention and treatment of water deficit diseases. This disease, commonly known as drought damage, mostly occurs in the high-temperature season from July to August. In the case of persistent high-temperature drought, it often causes leaf wilting and scorching, and the fruit cannot expand. Prevention method is every 4-6 days, in the morning and evening irrigation, in order to reduce temperature and humidity. It is better to use irrigation to feed horse water, or to drain water in the garden drainage ditch, and spray water at the same time. Conditional orchards, drip irrigation better. Second, the prevention and treatment of waterlogging disease. The disease mostly occurred during June-August, due to the high rainfall during the rainy season or the annual heavy rain caused by tropical storms and strong typhoons. Flood-damaged and wet-damaged. Flood damage type: due to too much water, can not be ruled out in time. When water accumulates for more than 12 hours, it will cause direct water damage to the plant's underground. Wet damage type: the whole plant is affected by the soil moisture in the tillage layer for a long time in the state of water saturation and severe oxygen deficiency in the soil. Flood damage is an acute disease that is often devastating. The prevention and control method is to choose the edge of the ditch where the drainage is smooth and the sunny slope when setting up the park. Before planting, open the drainage ditch and the surrounding ditch and outlet ditch so that the ditch and ditch can communicate with each other. Third, the prevention of wind damage. From July to August each year, tropical storms, strong typhoons, or friendlier winds often occur, resulting in broken branches and leaves, and even collapsed frames, causing great losses. Precautionary measures include: when planning the establishment of parks, windbreaks should be provided, and species such as fast-growing Chinese fir and metasequoia should be preferred. Reinforce the rack surface, choose the type of scaffolding, and set up about 60 concrete poles per acre. The top of the column is drawn into a rack with No. 8 wire, and then it is drawn into a 50-60 cm wide grid with 12-14 iron wires. Fourth, the prevention of fruit sunburn. Due to the direct sunlight, the sunny side of the fruit often turns dark brown and fluffy. The fruit flesh is necrotic when severe, and the peel is submerged and becomes leathery. The control method was fruit bagging after one month of fruiting. Fifth, the prevention and control of frost damage. Frost damage is divided into winter frozen and spring frozen. Winter freezing: The trunk of the plant is frozen in the winter and the local or ring-shaped bark peels off at an area of ​​10-15 cm above the ground. The heavy-bearing plant will die in the spring above the frostbite. Spring freezing: Generally occurs from the end of March to the beginning of April. Due to the abnormal climate and high temperatures, plants in dormant state will sprout early. When the cold air is encountered, it will freeze the buds. The fundamental measure to prevent frost damage is to strengthen the comprehensive management of orchards, promote branch-filling, and increase the cold resistance of trees. Before the onset of frost in spring, the twigs were tightly covered with a film, which could have a good antifreeze effect.
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