Bui. 684, U. S. Dept. of Agriculture. 



Plate III. 





Bitter-Rot Cankers on Apple Branches of Various Ages. 



Each of these cankers was located above a clump of rotted fruits and was producing spores in 

 immense numbers. The varieties are Givens, Jonathan, and Ben Davis. Bentonville, 

 Ark., 1915. 



