82 GARDEN FOES. 



case of older, woody branches; and it may be taken for 

 granted that a young shoot, onoe attacked, is doomed, the 

 bark being quickly destroyed quite down to the wood, the 

 edges of the wound becoming thickened and rugged. 

 Finally, the wood is also attacked, and not infrequently 

 much reduced in thickness, until at last the branch breaks 



[Photo: H. A. >i.iith. 

 APPLE SHOOTS A'lTACKKD BY CANKER. 



off at the wound. Like tlie majority of destructive para- 

 sites, tlie present fungus possesses two distinct kinds of 

 fruit. The first form, which is most responsible for the 

 sprea<l of the disease, appears under the form of very 

 minute tufts on the cankered portions of bark or woo<l. 

 The second form of fruit, which consists of a further de- 

 velopment of the white tufts of the first form, matures 



