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Reproduction and Development of the Potato Stalk Borer, (Coleoptera: Curculionidae) with Notes on Field Biology

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Biological studies of the potato stalk borer (PSB),Trichobaris trinotata (Say), were conducted in central Texas from July 1981 to August 1982. The PSB oviposits in the stem terminals of horsenettles, Solanum carolinense L., in the field. Cultivated potatoes, Solanum tuberosum L., served as the host for laboratory rearing studies. Subsequent development occurred in the stems of the host plants. The duration of the egg and combined larva stages averaged 7.4 and 58.4 days, respectively, in the laboratory. The prepupal period ranged from 2 to 6 days, and the pupal stage averaged 12.1 days in duration. Limited field observations indicated that the PSB is univoltine in Texas and overwinters in the adult stage inside the stalks of horsenettles. A pteromalid, Neocatolaccus tylodermae (Ashmead), was identified as a natural enemy of the PSB. Simple life and fecundity tables for the PSB were constructed from laboratory data. Life-table analysis showed generation mortality was highest during the larva stage. Data from the life and fecundity tables were used to calculate basic population statistics for the PSB. The net reproductive rate (times increase per generation) was 15.8 and the capacity for increase per year was 2.8.

Document Type: Research Article

Publication date: December 1, 1986

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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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