Bul. 684, U.S. Dept. of Agriculture. BEATE e |: 
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MICROSCOPIC CHARACTERS OF THE APPLE BITTER-ROT FUNGUS. 
Fie, 1.—A perithecium from an artificial culture of Glomerella cingulata isolated from a canker 
caused by Phyllosticta solitaria. X 350. 
Fig. 2,—Asci from a perithecium obtained in the same manner as that shown in figure 1. 350. 
Fia. 3.—Ascospores from asci obtained in the same manner as those shown in figure 2. x 425. 
Fig. 4.—Section through an acervulus from a bitter-rot spot on a Ben Davis apple artificially pro- 
duced through the agency of spores from pure cultures of the fungus. The cultures were made 
from conidia obtained from a bitter-rot canker.  X 350. 
Fia@. 5.—Conidiophores and a conidium from the acervulus shown in figure 4. x 350. 
Fig. 6.—Conidia from the acervulus shown in figure 4.  X 425. 
