The Potato Leafhopper and Its Control 7 
Fic. 4.—Early Ohio potatoes killed by “hopperburn.’’ Great abundance of leafhoppers and a period 
of hot, dry, July weather caused these potatoes to succumb to ““hopperburn” in ashort time. 
Fic, 5.—Main-crop potatoes protected from “hopperburn” by Bordeaux mixture. Two sprayings 
with Bordeaux mixture kept this field fairly free from ‘‘hopperburn,” 
