96 Nebraska Agricultural Exp. Station, Research Bui. 12 
DESCRIPTION OF PLATE XIV 
Cross sections of trunk and branches of Ben Davis tree, which was 
starved by having a portion of the root system removed, and inoculated. 
The tree cut off just above the ground. Cross sections 2 inches 
thick were removed at approximately 16-inch intervals. These blocks 
were planed and photographed. The crown and roots were also dug 
up and examined. 
A. Crown of tree. As shown in the photograph little of the 
infection extended into the roots. One root, however, wnlch was close 
to the surface of the ground was infected for several feet. Infection 
emerged below the crown of the tree. 
B. Two sections of trunk and two sections of main limb. 
C and D. Branches attached to the lower right-hand block in B. 
E. Branch attached to opposite lower left-hand block in B. 
Infection was close to the surface over the entire tree. One char- 
acteristic canker was formed on branch D. 
