Stem and Twig Lesions. Stem lesions often indicate infection has been present for at least a year. They serve as a reservoir for persistent inoculum and are able to produce inoculum
for up to four years. When they occur on woody tissue, they are the same color as the branch but have a raised, wart-like surface (Fig. 6a). Symptoms on twigs and fruit are similar and consist of dark brown or black raised corky lesions surrounded by oily or water-soaked margins (Fig. 6b). As the lesions mature, they appear scabby or corky
Fruit Lesions. Young lesions are raised, blister-like, tan, and can be surrounded by yellow halos, depending on fruit maturity (Fig. 7). As lesions age, they become dark brown to black with brown to black sunken, corky centers, and they may have yellow halos (Fig. 8). Old lesions often have a gray appearance. Generally, the lesions are circular and vary in size. Lesions cause blemishes and early fruit drop, thereby reducing fruit yield (Fig. 9). The internal quality of the fruit is not affected.