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Seasonal Population Fluctuations of Filipjevimermis leipsandra and Infectivity of Juveniles on the Banded Cucumber Beetle

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Abstract:

Studies of the biology, ecology, and potential of a nematode Filipjevimermis leipsandra Poinar and Welch as a biological control agent for the banded cucumber beetle Diabrotica balteata LeConte were initiated in 1978 at Charleston, SC. Parasitism of the beetle larvae by the nematode was obtained in the field as early as the 1st week in Mar. and as late as the 1st week in December. Most parasitism occurred during periods of high rainfall and high temperature; parasitism was highest in Sept. and early Oct. As many as 23 postparasitic nematodes were obtained from a single larva. Body lengths of post parasitic nematodes ranged from 15 to 62 mm; the number of eggs deposited correlated with the length. As many as 7000 eggs were obtained from one nematode. Parasitism of the insect was obtained in the laboratory by exposing 1st instars to field collected soil or to potting soil with F. leipsandra eggs. The amount of parasitism obtained from a given number of beetle larvae and nematode eggs varied considerably despite our attempt to control the conditions as precisely as possible. The most post parasitic nematodes were obtained from soil that received the highest levels of nematode eggs.

Document Type: Research Article

Publication date: April 1, 1980

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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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