Figure 9.  (a, top) Fourteen to 15 days after infection galls begin to have a gray, silvery appearance (b, middle) as streaks of blackened tissues due to formation of teliospores occur in inner portions of galls that have been cut transversely. (c, bottom) Kernel galls are hollow because endosperm and embryo tissues of the kernel do not develop. (Courtesy J.K. Pataky) BACK