CEREALS 



361 



tribution, being found in all the 

 fields examined in Ohio. In one 

 field it is estimated to have re- 

 duced the yield from 75 bushels to 

 25 bushels, and it is assigned as a 

 prominent cause of shriveling, such 

 as is often attributed to rust, as 

 well as of whitening and blighting 

 of plants preceding ripening. Upon 

 the heads the disease resembles 

 scab, with the exception that no 

 rose-colored coating is present; 

 instead black acervuli are found 

 upon close examination. Parts of 

 the head above the points of at- 

 tack die. The portion of the head 



that is killed is a total loss, and the general decrease in 

 vigor of the plant results in shriveled light grains. Upon 

 stalks and leaf sheaths, beginning at the ground and extend- 

 ing over several internodes, the acervuli may be so numer- 

 ous as to cause blackening. 



Fig. 156. — Basal portion of 

 rye plant showing anthrac- 

 nose upon stem and leaf 

 sheath. After Manns. 



FlQ. 157. — Normal rye kernels and shriveled ones due to antliracnoae. 

 After Manns. 



