Simulation Studies of Binomial Sampling: A New Variance Estimator and Density Predictor, with Special Reference to the Russian Wheat Aphid (Homoptera: Aphididae)

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Abstract:

Standard methods of obtaining absolute population estimates for the Russian wheat aphid, Diuraphis noxia (Mordvilko), are not feasible because of the insect's small size, aggregated distribution, and difficulty in handling the samples. Because presence-absence information can be obtained easily. prediction of population density based on the proportion of sample units uninfested by the organism (Po) was investigated. Data on sample density (m) and Po for the Russian wheat aphid were obtained weekly in two winter wheat fields. The relationships between In(m) and In(-In Po) and between In(s') and In(m) were determined by regression. Several different published formulae for density predictions and their variances using the above regressions were examined analytically. New density predictor and variance estimators were developed and shown through simulation to be superior to existing estimators.

Document Type: Research Article

Publication date: February 1, 1991

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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