Abstract
During the summer of 1931 grasshoppers (Melanoplus bivittatus and M. differentialis) destroyed 75 per cent of the crops over an area 17,000 square miles in extent and 25 per cent of the crops over an additional 13,000 square miles. Commercially made poisoned bran mash gave good results. Air-planes were used successfully and economically in scattering grasshopper bait in corn fields. Maximum feeding on poisoned bran mash took place most commonly at air temperatures of 75 to 85°.
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