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Comparison of Three Methods for Sampling Northern Corn Rootworm (Coleoptera: Chrysomelidae) Adult Populations in Two Quebec Cornfields

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Abstract:

We found that two sampling methods, direct counting and monitoring insects in emergence cages, were equally efficient for estimating the size of two populations of the adult northern corn rootworm, Diabrotica longicornis barberi Smith and Lawrence, at any time of the season in southern Quebec. Both these techniques can also be used for estimating total numbers of insects emerging in a season. However, the direct-counting method was found to be more economical and less time-consuming than the use of emergence cages. A yellow vinyl sticky-tag trap (15.2 by 6.4 cm) was suitable for detecting and monitoring beetle emergence and activity, but was not reliable for estimating the absolute population.

Document Type: Research Article

Publication date: October 1, 1984

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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