Biology and Control of Centrinaspis capillatus (Lec.) in Redtop1

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A small weevil, Centrinaspis capillatus (Le Conte), is a serious pest of redtop in Illinois, and it frequently reduces seed production by as much as 75%. The weevil overwinters in the adult stage in the soil in fields of redtop. It leaves hibernation in May and soon begins to oviposit in stems of the host plant. The egg stage lasts 8 to 10 days. The larva feeds for 30 to 40 days in an internode of the stem and then crawls into the soil where it remains relatively inactive for another 30 to 40 days before pupating. The pupal stage lasts 10 to 14 days. There is one generation each year. Centrinaspis capillatus (Le Conte) is present in redtop throughout southern Illinois but it is not recorded from northern Illinois. Tests with insecticides indicate 1/4 pound of dicldrin or 1/2 pound of heptachlor per acre will control this insect.

Document Type: Research Article

Publication date: August 1, 1959

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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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