Biology of Cosmobaris amertcana Casey1, a Weevil Attacking Sugarbeets2
Authors: LANDIS, B. J.; PEAY, SWALTER E.; FOX, LEE
Source: Journal of Economic Entomology, Volume 63, Number 1, February 1970 , pp. 38-41(4)
Publisher: Entomological Society of America
Abstract:Adult and larval feeding on the petioles of sugarbeets, Beta vulgaris L., by Cosmobaris americana Casey, a weevil that attacks betaceous crops and several weeds, chiefly members of Amaranthaceae and Compositae, interfered with the translocation processes; larval feeding also caused injured petioles to wither and die. In the Northwest, adults first appeared in May and lived 3-4 months; eggs were first deposited in feeding pits in late May, and eggs started hatching in June. The larvae developed slowly, but became full grown in August; those that were not full grown by October died during the winter. Full-grown larvae overwintered in old feeding galleries in weed hosts and only rarely in sugarbeets; pupae and adults were both produced mostly in May. There was 1 generation.
The suitability of various plants for completion of the weevil's life cycle depended largely on the moisture in the parenchymous tissues mined by the larvae. Larvae feeding in watery petioles of sugarbeets drowned in decomposing tissues or starved after the injured part dried and died; larvae feeding in woody stems of weeds were not so affected.
Document Type: Research Article
Publication date: February 1970
- 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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