PLATE 7 
Plants of Harvest Queen (Red Cross) wheat grown in plots of inoculated (A) and 
uninoculated (B) disinfected soil. 
A. —Thin stand caused by severe attack of rosette disease. The soil in this plot 
had been disinfected in the same way as that in B, but was inoculated with a small 
amount of infested soil when seed was sown. 
B. —Good stand of wheat. The soil in this plot had been disinfected with for- 
malhyde previous to seeding and was not inoculated. Both A and B were sown at 
same rate and at same time with clean seed. 
