The European corn borer is at present considered to be the No. 1 insect pest of corn in South Dakota. It is now known (by specimen records) to be present in every county east of the Missouri river and in Lyman, Gregory and Tripp counties west of the Missouri River in South Dakota. During 1948 the corn borer did an estimated $2,500,000 worth of damage in our state~ In 1949 this damage figure was increased to $7,545,000.
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South Dakota State College
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Spawn, Gerald B., "The Use of Aircraft in European Corn Borer Control" (1950). Agricultural Experiment Station Entomology Pamphlets (1940-1952). 14.