322 



MANUAL OF TREE DISEASES 



many upright laterals arise and in time large brooms are 

 formed. The foliage of the brooms is yellowish and the leaves 

 smaller than normal. The ultimate effect of the production of 



FiQ. 62. — Witches'-broom on black spruce 

 caused by a dwail mistletoe. 



several brooms, even on an older tree, is slow starvation of the 

 remainder of the tree. As shown in the illustration (Fig. 63), 

 the tree finally dies, the brooms being the last part to succumb. 



