CEREALS 



337 



borne spores, which come, in part, from diseased ears, but 

 more largely from diseased stalks left in the field. 



Fig. 143. — Dipiodia on old shanks. After Burrill & Barrett. 



Any method of reducing the amount of infective trash, 

 particularly old stalks near or in the fields, aids in control 

 z 



