20 



A Bulletin on Orchard Practice 



to be learned about these diseases of which the Gall ic the 

 more common. It is found on the roots of various kinds of 

 fruit trees and other fruit-bearing plants, and other plants as 

 well. 



The above report says, galls often occur in connection with 

 hairy-root, but these are results of wounds rather than a 



CROWN- GALL on Apple Root. 



form of this disease. *Apple crown gall is of two types," 

 says the report. "A hard! callous form is common on grafted 

 trees at the union of the root and scion, and at any other point 

 of the root system where wounds occur in either the cultivation 

 or transplanting of trees." "A second type is a soft form more 

 common on seedlings," meaning seedling stock used for graft- 

 ing. In my opinion this "soft" form may be the same as that 

 designated as the "callous" form, being soft by reason of the 

 softer tissues of young seedlings. 



All forms of root disease should be rejected and destroyed 

 both by the nurserymen and planters. 



No remedy for this disease has yet been found, and much 

 concerning it remains to be studied. F. A. H. 



