Population Dynamics in the Squash Bug (Heteroptera: Coreidae)-Squash Plant (Cucurbitales: Cucurbitaceae) System in Oklahoma1
Authors: FARGO, W. S.; RENSNER, P. E.; BONJOUR, E. L.; WAGNER, T. L.
Source: Journal of Economic Entomology, Volume 81, Number 4, August 1988 , pp. 1073-1079(7)
Publisher: Entomological Society of America
Abstract:The population dynamics of the squash bug, Anasa tristis (DeGeer), and the seasonal development of the squash plant, Cucurmta pepo L. variety 'Hyrific,' were monitored during 1984 and 1985. Numbers of squash bugs increased dramatically throughout the season. Overwintered adults and subsequent oviposition occurred soon after plant emergence. The development of first-generation nymphs and adults slowly increased the total number of squash bugs in the field. The development of a second generation caused a pronounced increase in the total numbers present. The numbers of nymphs, adults, and eggs in the field increased at an exponential rate beginning about Julian date 192 (10 July). Late in the season the rate of oviposition decreased. Squash bugs complete two to three generations per year in Oklahoma. Our data suggest that early-season control of squash bugs is essential to prevent high densities of insects from occurring late in the year. Mean plant leaf area and the number of leaves followed a sigmoid-shaped growth curve, increasing slowly early in the season, becoming faster through midseason, and slowing again late in the season. The numbers of flower buds, flowers,and immature and mature fruit also followed a sigmoid-shaped growth curve throughout the season.
Document Type: Research Article
Publication date: August 1, 1988
- 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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