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A computer was programmed to use a random-number generator to initially position males and females of Lygus hesperus Knight in a simulated field. The position of the bugs was visualized on a data-display scope. H both sexes were physiologically able, and if the males were within an area encompassed by the females' sex pheromone, mating occurred. The random generator, by using a uniform distribution, was next called upon to move, or reposition, the bugs, which were again tested for mating. Simulations were run with varying densities of both sexes, and with varying sex ratios. With L. hesperus, successful mating did not occur if the density of hugs (sex ratio = 1:1) was below 10/2500 ft2 of field. When the female density was low, a large number of males (sex ratio = 19:1) was required to effect 100% matings in 1 hour, but when female density was high (125 females/2500 ft2) only a slight excess of males was required to obtain 100% mating in 1 hour.
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.