When the spring equinox arrives, temperatures in many areas of southern Xinjiang have risen significantly, and fruit trees have also blossomed. At this time, it is a critical period for fruit trees to prevent and control diseases and insect pests, especially the number one pest of fruit trees-red spider. Fruit farmer Du in the 13th Regiment of Alar City planted 50 mu of fragrant pear orchard. However, due to poor management, red spiders broke out, causing serious pear leaves to fall off and pear trees to bloom early.
Pear trees bloom in spring according to the growth pattern, but Du's pear trees bloomed earlier in October last year. What's the matter? In order to find out the cause and loss, Du entrusted Xinjiang Zhenguanda Agricultural Technology Co., Ltd. to conduct agricultural technology appraisal and find out the situation.
After accepting the entrustment, the unit appointed technical personnel Zhang Weizhen and Shen Tongan to form an identification team to conduct on-site inspection and investigation of the fragrant pear orchard involved: the main tree planted in the pear orchard involved is fragrant pear, which is 18 years old and has a spacing of 3 meters ×6 meters, diameter at breast height 20-25cm. There are many vegetative branches on the fragrant pear tree in the pear garden. Observing the flower buds on the branches of the pear can find that some of the flower buds have now withered due to early opening, and the wilting florets are clearly visible. Check the adjacent pear orchard with normal management. The flower buds are growing normally, the shape is full, and there is no wilting of the flower after the early opening, and the fruit trees are pruned in place, and the pear trees are growing well.
Red spider has become one of the important pests of garden flowers and trees in recent years. It mainly damages the leaves, stems, flowers, etc. of plants. It pierces and sucks the stems and leaves of plants, reducing the moisture of the affected parts, showing chlorosis and whitening, and the surface of the leaves shows dense pale spots, curling and yellowing. In severe cases, yellow leaves, burnt leaves, leaf curling, leaf falling, and death occur in plants. At the same time, spider mites are also the transmission mediators of viral diseases. Due to poor management, Du's pear orchard caused a red spider hazard, resulting in a yield loss of 121,500 yuan in the orchard.
The agronomist Shen Tongan reminded fruit growers that each spring is an important node for the prevention and control of red spiders. Taking pear trees as an example, first of all, focus on prevention and control within 10 days after the pear trees germinate and fall flowers. This period focuses on the prevention and control of overwintering adult mites and Eggs, harmful mites are lighter, we can spray acaricide in time after falling flowers. By mid-to-late May, the second chemical control can be carried out in time according to the occurrence of harmful mites, and the specific frequency will be determined according to the occurrence. Pay attention to the medication must be even and thoughtful, do not leak the spray phenomenon, try to avoid the windy weather to spray.
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