Prevention points: Strengthen the quarantine of seedlings, and prohibit the transfer of vaccines and scions. The epidemic is destroyed on the spot. Cohesive Bandage With Elastic Adhesive,Cohesive Finger Tape Bandage,Elastic Cohesive Bandage,Cohesive Tape Bandage RFX+CARE Manufacturing Co.,Ltd. , https://www.rk-rfxcare.com
Poplar Mosaic Virus Disease and Its Control
The newly emerged chlorotic spots on the victim's leaves turn into irregular yellow-green spots, which are often distributed along the small veins. The veins are translucent, and there are hidden symptoms with high temperatures. Some poplar clones have become sickened, thickened, hardened, reduced, and even deformed. Some veins and petioles have purplish red necrotic spots, and the central tissues of the lesions die. The disease is a systemic infection. Incidence patterns: poplar mosaic virus can be transmitted through grafting, and forestry production is mainly spread with poisonous cuttings. At present, it is known that poplar pollen seeds do not carry the virus, and the black miracidia and the peach pods do not transmit disease. The dodder seedlings do not transmit disease. Whether or not other insects transmit diseases is yet to be further studied. Poplar due to species differences, the difference in resistance is also very large, I-63, I-69, I-72 Yang susceptible, 107 and other varieties more resistant. The incidence of different tree ridges is not the same. One-year-old seedlings and saplings are onset and the symptoms of big trees are not obvious.