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In a laboratory bioassay, termites were allowed to tunnel into a 5-cm core sample of sand (pH 8.1) treated with termiticides following an application protocol before construction. Termiticides (active ingredient) tested were; Dursban TC (chlorpyrifos), XRM-5160 (chlorpyrifos), Equity (chlorpyrifos), Dragnet FT (permethrin), Prevail FT (cypermethrin), BiHex FT (bifenthrin), Pryfon 6 (isofenphos), Demon TC (cypermethrin), PP321 (Iambda-cyhalothrin), and Sumithion 20MC (fenitrothion). Because the vertical integrity of the treated sand was maintained, termites were exposed to termiticides in the same orientation as would occur under field conditions. Results 3 h after the termiticide application indicated that all formulations of termiticides tested provide equal barrier protection against the eastern subterranean termite, Reticulitermes flavipes (Kollar). The Formosan subterranean termite, Coptotermes formosanus Shiraki, however, generally tunneled deeper into sand treated with organophosphates than sand treated with pyrethroid termiticides. Treated plots were covered by concrete slabs for 1 yr. Results of a second bioassay with the 1-yr-old samples indicated the loss of barrier efficacy of the isofenphos treatment against both termite species. Possible factors that contributed to isofenphos degradation are alkaline sand, high precipitation, and microbes.
Document Type: Research Article
Publication date: June 1, 1993
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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.