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Spatial Distribution of Adult Corn Flea Beetles, Chaetocnema pulicaria (Coleoptera: Chrysomelidae), Sweet Corn and Development of a Sampling Plan

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Abstract:

The com flea beetle, Chaetocnenw pulicaria Melsheimer, is an important pest of sweet com because it transmits Erwinia stewartii (Smith) Dye, the causal pathogen of Stewart's wilt. Our goal was to quantify corn flea beetle distribution within and between sweet com plants and develop a sampling method that would be compatible with an existing sampling plan for lepidopteran pests. From plant emergence to tile 5th fully emerged leaf stage, >50% of the com flea beetles were recorded on the uppermost fully emerged leaf and the whorl leaves. For more mature sweet corn, 40-50% of the com flea beetles were recorded on leaves 4-6. The between-plant distribution pattern of adult com flea beetles fit a negative binomial distribution and was aggregated. The Wald sequential probability ratio test was used to develop sequential sampling plans for different combinations of type I and II errors, and 2 sets of decision rule boundaries. The sampling plans were validated and the effect of truncation at 100 samples examined by Monte Carlo simulation techniques. With the upper boundary of the decision rule set at the current threshold, the sampling plan would be reasonably cost effective and compatible with the lepidopteran sampling plan, although the type II error is relatively high.

Document Type: Research Article

Publication date: October 1, 1995

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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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