Bui. 684, U. S, Dept. of Agriculture. PLATE III. 
BITTER-ROT CANKERS ON APPLE BRANCHES OF VARIOUS AGES. 
Each of these cankers was located abov 
immense numbers. The varieties are Givens, Jonathan, and Ben Davis. Bentonville, 
Ark., 1915. 
ea clump of rotted fruits and was producing spores in 
