1. UC IPM
A healthy grape leaf (left) compared with leaves with corky bark, <i>Grapevine virus B</i> right, and leafroll due to one or more <i>Grapevine leafroll-associated viruses</i> center.
A healthy grape leaf (left) compared with leaves with corky bark, Grapevine virus B right, and leafroll due to one or more Grapevine leafroll-associated viruses center.
Credit: Jeffrey Hall