602 



STATE BOARD OF AGRICULTURE. 



Plate III 



Michigan Technical Bulletin No. 5.3 



iii 



• I— ( 







P]ate III. Fig. 1. Infection on leaflets (upper left) and on leaf petioles. 

 (Photograph and inoculation by Dr. G. H. Coons.) 

 Fig. 2. Diseased (left) and healthy (right) plants of the same 

 age. (3^ nat. size.) 



