Bui. 1058, U. S. Dept. of Agriculture. 
Plate If I. 
Wisconsin No. 22 Oats, Sprayed with Water Suspension of "Stock" 
Halo Organism. 
Not injured before spraying on June 29, 1918. Collected in July, 1918. Photographed in 
January, 1921. Three-fourths natural size. 
