April, ’20] 
JOURNAL OF ECONOMIC ENTOMOLOGY 
Plate 2 
1. Potato plant that had been protected from leaf hoppers throughout season. 
Photographed at time of digging when all unprotected plants in the field were dead. 
2. Potato plant that had been caged with large number of leaf hoppers for three 
days. This plant was burned to a crisp. 3. Typical hopperburn injury to bean 
plant. 4. Portion of potato field showing type of cage used in experiments and 
enclosed hopperburned plant 
