1. UC IPM
Pinot Noir grape leaves that prior to the normal time of fall color have turned red between the veins due to leafroll caused by one or more <i>Grapevine leafroll associated viruses</i>.
Pinot Noir grape leaves that prior to the normal time of fall color have turned red between the veins due to leafroll caused by one or more Grapevine leafroll associated viruses.
Credit: Jack Kelly Clark