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The Spotted Lady Beetle, Coleomegilla maculata (De Geer), as a Predator of European Corn Borer Eggs1

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The spotted lady beetle, Coleomegilla maculata (De G.), is a known predator of the eggs of the European corn borer, Pyrausta nubilalis (Him.), but the actual extent of control had never been Devised for collecting the fecula of the spotted lady beetle and other predators found on corn plants were characterized and a method devised for collecting these pellets beneath the site of borer eggs. By examining the fecula, it could be determined whether this beetle had fed, In two different fields under observation 16.5 and 15.3%of the eggs were fed upon.

Studies on food preference and potential egg consumption showed that the spotted lady beetle would feed only upon pollen, pea aphids, Macrosiplmm pisi (Harr.), or eggs of the European corn borer, when these foods were on appropriate plants, in this case older corn leaves and alfalfa. It was found that the number of eggs an individual adult spotted lady beetle could consunms averaged 59.4 per day. Temperature and rainfall had no significant effect upon feedling.

Document Type: Research Article

Publication date: October 1, 1959

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  • 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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