PLATE 3 
A. —Representative root system of a good inbred strain of corn. The com was 
planted June 2, 1922, and was excavated 77 days after planting. Less than 10 per 
cent of the roots showed evidence of root rotting. 
B. —Representative root system of an inbred strain of com susceptible to rootrot. 
Over 96 per cent of the roots showed evidence of root rotting. 
