Damage by insects to crops is generally recognized to be of great importance. Not infrequently we see estimates of losses, but even these fail to impress most of us until some widespread insect depredation occurs, such as an outbreak of armyworms, or of white grubs. Several years ago; at the request of President Raymond A. Pearson, the writer made the following estimate of the annual losses caused by insects in Iowa.
Proceedings of the Iowa Academy of Science
©1918 Iowa Academy of Science, Inc.
Webster, R. L.
"Food Conservation and Economic Entomology,"
Proceedings of the Iowa Academy of Science, 25(1), 117-122.
Available at: https://scholarworks.uni.edu/pias/vol25/iss1/16