The Effect of Warming Winter Temperatures on the Severity of Pierce's Disease in the Appalachian Mountains and Piedmont of the Southeastern United States

Fig. 2. Pierce’s disease symptoms on grape vines showing (A) marginal chlorosis and necrosis, (B, shown here) leafless petioles "match-stick" symptoms, and (C) "green island" symptoms.



Image from Plant Health Progress article:
The Effect of Warming Winter Temperatures on the Severity of Pierce's Disease in the Appalachian Mountains and Piedmont of the Southeastern United States