VIRUS NECROSIS OF TOBACCO VEINS
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
Virus necrosis of tobacco veins browning of tobacco veins occurs all over Poland and causes major economic losses. Studies of a number of orders show that the necrosis of tobacco veins is caused by a virus, which belongs to the group of potato virus Y Solanum virus 2. Under natural conditions, the virus is transferred most frequently by peach-tree lice Myzoides persicae and potato lice Aphis rhamni. Mechanical innoculation stroke of healthy plants by the sap of diseased plants can also result in an infection, and that increases the possibility of spreading the disease. Virus necrosis of tobacco veins is not transferred by seeds. It hibernates in bundles of potatoes, but not all varieties of potatoes are carriers of the virus.