Soil Disinfection for Potato Wart 
Plate 2 
Treatments Given in 1921—Photographs Made in 1922 
A. Stunted growth of potatoes during 1922 in a plot treated before planting time in 1921 with lime- 
sulphur l to 5, one-half gallon per square foot. (Photographed August 10,1922) 
B. Spindling growth of potatoes during 1922 in a plot treated before planting time in 1921 with 1 per 
cent HgCb, 1 gallon per square foot. (Photographed August 10, 1922) 
C. Growth of potatoes during 1922 in a plot treated before planting time in 1921 with 2 ounces of sul¬ 
phur per square foot. (Photographed September, 1922.) The potatoes planted in the spring of 1922 
failed to grow and the plot was replanted during the summer. In some cases the distorted stems did 
not reach the surface of the ground and few stems exceeded 1 inch in height 
