Field Studies on Rate of Hatch of Western Corn Rootworm1 Eggs in Missouri During 1965-682

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To facilitate an explanation of the erratic performance of soil insecticide in controlling the larvae of Diabrotica virgifera LeConte, a field study was conducted on hatching rate of western corn rootworm eggs. Biweekly soil samples were taken during June and July from 1965 to 1968. These samples were processed by washing, and the residuum was examined microscopically for immature forms. These data were compiled, and statistical analysis was based on rate of egg hatch. For 3 of the 4 years (1965, 1966, 1968), it was shown that western corn rootworm egg hatch began about June 1 in Missouri and proceeded at the average rate of 2.91% per day, until hatch was completed. For 1967, the data showed an average rate of 1.77% per day, and eclosure began about June 4. Although initial date of hatch was similar for the 4 years of this study, a significant difference in rate of egg hatch was observed.

Document Type: Research Article

Publication date: February 1, 1971

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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