66 MANUAL OF FRUIT DISEASES 
one on the upper surface. At maturity the walls of the cup- 
shaped structures split and recurve in a stellate manner. In 
cases of severe infection the leaves turn yellow and fall. Some- 
times 200 to 300 spots may occur on a single leaf. The diseased 
Fic. 18. — Cedar-apples in winter condition. 
fruits are recognized by the presence of the cup-shaped fruit; 
ing bodies which are usually aggregated at the calyx-end. Not 
infrequently the lesions develop on the side or on the stem- 
end. As previously noted the fruits are dwarfed as a result 
of their being affected when they are young. Rust is rarely 
