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Pharaoh Ant (Hymenoptera: Formicidae): Fenoxycarb Baits Affect Colony Development

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Fenoxycarb, an insect growth regulator, was highly effective against the Pharaoh ant, Monomorium pharaonis (L.). Fenoxycarb acts by reducing egg production in the queens; the colonies eventually die because of worker attrition. The best laboratory results were obtained using concentrations of 0.25, 0.5, and 1% in peanut oil. These concentrations significantly reduced worker numbers by 12 wk and quantity of brood by 5 wk, if not sooner; however, more than one baiting was necessary to eliminate the colonies completely. Also, in some tests, colonies fed fenoxycarb baits at concentrations of 0.1, 0.25, and 0.5% Significantly delayed the production of winged reproductives. Intermediate castes (individuals that were larger than workers yet smaller than queens) were produced at lower concentrations (0.05, 0.1, and 0.25%). Higher concentrations of 2.5 and 5% were not effective, probably because of repellency of the chemical. These results demonstrate that fenoxycarb is as effective as the commercially available bait, Pharorid (methoprene), for the control of the Pharaoh ant.

Document Type: Research Article

Publication date: August 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.
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