Relation of Empoasca fabae to Hopperburn and Yields of Potatoes12

Abstract

Observations on injury to Bliss Triumph potatoes caused by different populations of E. fabae in outdoor cage expts. indicate a close straight-line relationship between nymph populations and % of hopperburn. Relatively great yield reductions resulted from low leafhopper densities, and with further increases in leafhopper populations the yield reductions became proportionally less great. E. fabae injury appeared to have little, if any, adverse effect on the subsequent yielding ability of tubers from affected plants.