MASSACHUSETTS 

 AGRICULTURAL EXPERIMENT STATION 



liullctin No. -.^m December, 1939 



Cephalosporium Elm Wilt 

 In Massachusetts 



By Malcolm A. McKenzie and Eunice M. Johnson 



The widespread occurrence of a wilt disease of elm, associated with a fungus 

 of the genus Cephalosporium, became apparent during recent surveys of the 

 State for shade tree pests. This paper reports an attempt to discover whether 

 the disease is specific to the American e!m, as well as a study of the entry and 

 development of the fungus within the host. 



MASSACHUSETTS STATE COLLEGE 

 AMHERST, MASS. 



