 Dead arm is a disease that causes symptoms in the common grapevine species, "vitis vinifera", in many regions of the world.This disease is mainly caused by the fungal pathogen, "Phomopsis viticola", and is known to affect many cultivars of table grapes, such as Thompson Seedless, Red Globe, and Flame Seedless.Early in the growing season, the disease can delay the growth of the plant and cause leaves to turn yellow and curl.