3ul. 684, U. S. Dept. of Agriculture. 



Plate I. 



Microscopic Characters of the Apple Bitter-Rot Fungus 



Fig. 1. — A peritheeium from an artiflcial culture of GlomereUa cingulata isolated from a canker 

 caused by Phyllosticta solitaria. X 3c0. 



Fig. 2. — Asei from a peritheeium obtained in the same manner as that shown in figure 1. X 350. 



Fig. 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. 



Fig. 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. 



