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) leafless petioles "match-stick" symptoms, and (C, shown here) "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