Big Vein of lettuce is transmitted by

Solution(By Examveda Team)

The big vein of lettuce is transmitted by Bacteria.
Lettuce big-vein disease causes leaf distortion and ruffling in affected lettuce plants. Affected plants have veins that become large and clear, causing the rest of the leaf to become ruffled. Severely infected plants may fail to form a lettuce head.
This disease was first associated in 1983 with a rod-shaped virus named lettuce big-vein associated virus (LBVaV), which is transmitted by the obligately parasitic soil-inhabiting fungus, Olpidium brassicas.