6 
Colorado Agricultural College 
Pig. 3 Healthy and affected grains of common millet; 1, 2, 3, and 6, 
healthy grains; 4, 6, and 7, smutted grains. 
head in the case of Kursk, Hungarian and Siberian millets before one 
can determine whether plants are smutted or not. This is because the 
dark orange or yellowish color of the mature heads obscures the char¬ 
acteristic color of affected heads. 
Aside from the smut masses evident in the head, affected plants 
exhibit no other external evidence of the smut. The leaves and stem 
show no signs of the disease, except that affected plants are usually 
stunted and the heads frequently misshapen (Figs. 4 and 5 and 6 .) 
Examination of affected heads shows that in most cases every grain 
of the head is destroyed, altho it often occurs that only a part of the 
head is smutted and, furthermomre, only a few gains free from smut 
may be found between the diseased ones. 
The disease is evident in the heads even before they emerge from 
the sheath; the glumes enclosing the smut masses appear whitish and 
translucent. Except for the peculiar yellowing of the heads, as in 
