PLATE 2 
A. —A pecan twig killed during the year previous by a severe infection of pecan 
scab. 
B. —The black spots on the middle portion of the twigs are slightly raised 
masses of closely woven mycelium formed by the pecan scab fungus. Such spots 
produce Fusicladium spores during early spring. About natural size. 
C. —The large flat lesions on the middle portion of the twig are the results of 
early spring infections. The fungus is dead in such spots and does not form 
the overwintering stromata. Natural size. 
D. —A last year’s scab-killed nut, situated among the new leaves and inflores¬ 
cence. Scab-killed nuts are often a fertile source of the early spring infections. 
E. —A pecan twig showing old scab spots that are now beginning to heal over. 
