-J 



A 



Fig. 130. Blue-mold rot of apples. A, Apple rotted by PenicilUum expansum 

 Link; note the dark, heavily sporing coreinia (1) and the young larger coremia on 

 which conidia are just beginning to develoj) (2). B and C, Apples (Grimes Golden) 

 experimentally infected with strains of P. expansum, NRRL 973 and NRRL 979, re- 

 spectively. D, Apple similarly infected with P. crustosum, NRRL 943, but showing 

 reduced rot. E, Apple inoculated with but not infected by P. cyclopium, NRRL 942. 



511 



