Apple orchard mosaic disease is a common viral disease, diseased fruit grower weak. Infection characteristics After the eucalyptus body is infected with the virus, the whole body is poisoned and life-threatening. Symptoms appeared shortly after germination, and developed rapidly from April to May, and then slowed down. Basically stopped development from July to August, and even hidden, and re-developed after the autumn shoots. In severe cases, leaves will appear in late May, with an average yield reduction of around 30%. It is mainly spread by grafting. Scion and rootstock poisoning are the main sources of infection. The incubation period is 3 to 27 months. The virus can be inoculated onto the cucumber with the juice of the young leaves. The occurrence of the disease is greatly affected by environmental conditions and host growth conditions. When the temperature is 10-20 °C, the light is strong, the soil is dry, and the tree is weak, which is conducive to the occurrence and spread of the virus. î ‹î ‹ Control method 1 Strictly select virus-free scion and seedlings to reproduce apple seedlings. Before scioning, spray the general manager of the tree to disinfect or disinfect with a new high-fat membrane 100 times to isolate the virus for about 10 minutes. 2 Strengthen the nursery inspection, find that the diseased seedlings were removed and burned, and the whole garden sprayed the tree guards to sterilize and disinfect. 3 strengthen the management of sick trees. Remove the severely ill trees and saplings that have lost the ability to regenerate the trees; if the trees are slightly ill, increase the application of organic fertilizer, properly recut, enhance the tree potential and reduce the harm. Electromagnetic Flowmeter,Ultra Mag Flow Meter,Mag Flowmeter,Insertion Mag Flow Meter Jiangsu Baichuang Instrument Group Co.,Ltd , https://www.subcip.com