On the Many Frustrations of Gardening: Pierce’s Disease
...pectively, and eventually leaf margins dry or die in concentric zones; (2) fruit clusters shrivel or raisin; (3) dried leaves fall leaving the petiole (leaf stem) attached to the cane; and (4) wood on new canes matures irregularly, producing patches of green, surrounded by mature brown bark.” “Fruit clusters shrivel or raisin.” Turney described the life cycle of the sparpshooter, one of the main carriers of Pierce’s, who spread the diesase by feed...