Mosaic virus causes mottled yellow and green leaves ... Prune diseased branches off trees and shrubs. (When you do this, ...

The symptoms of rose black spot and the tobacco mosaic virus (TMV) are shown below. dig up and destroy infected plants wash their hands after handling infected plants wash tools that have come ...

Tobacco mosaic virus is used by scientists as a model organism ... Ash dieback causes the infected tree to wither and die Ash dieback is a fungal disease which causes ash trees to lose their ...