PLATE 6 
Plants of Harvest Queen (Red Cross) wheat from disinfected (left) and undisin¬ 
fected (right) pails of soil. 
A. —Healthy plants from one pail of disinfected infested soil shown in Plate 5, B 
at left. 
B. —Diseased plants from one pail of undisinfected infested soil shown in Plate 5, 
B, at right, showing severe attack of rosette disease. 
