612 



Potato. 



Thirty-second Annual Report 



Blackleg caused by Bacillus jjhijtophthorus, from St. 

 David. 



Scab caused by Oospora scabies, from Santa Cruz Valley. 



Rhizoctoniose caused by Rhizoctonia solani, from Santa 

 Cruz Valley. 



Fig. 9.— Trunk of peach tree killed by crown gall. Note the large gall at 

 base of the trunk on the left side. 



ORCHARD TREES 



Apple 



Die-back caused by Cytospora rubescens, from Apache 

 County. 



