The farmcrops of Iowa pay a heavy toll annually to insects. While many species figure in this loss to the farmers, a comparatively small number of species are responsible for a very large percentage of the total destruction. White grubs, the larval form of the May beetle, find place among these most destructive forms and if taken over a considerable period of years should likely be ranked most expensive of all.
Proceedings of the Iowa Academy of Science
©1930 Iowa Academy of Science, Inc.
Jaques, H. E.
"The 1929 Distribution of White Grubs in Iowa,"
Proceedings of the Iowa Academy of Science, 37(1), 387-388.
Available at: https://scholarworks.uni.edu/pias/vol37/iss1/106