Palatability of Insecticides to Honey Bee Workers (Hymenoptera: Apidae)

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Honey bee, Apis mellifera L., worker consumption of a 40% sucrose solution and six different concentrations each of avermectin, hydramethylnon, and methoprene was tested. Each concentration of each compound was emulsified in a 40% sucrose solution. Concentration experiments, also based on consumption of each compound, were performed to eliminate acutely toxic concentrations from the palatability experiment. A concentration was considered lethal if it caused 90% mortality after 24 h. The LC C90 for each compound was 0.0013% for avermectin, 2.5% for hydramethylnon, and 8.2% for methoprene. The emulsifying agents, where available, were tested separately. For the palatability experiment, avermectin was tested at concentrations ranging from 0.000041 to 0.0013%, hydramethylnon from 0.03215 to 1.0%, and methoprene from 0.04687 to 1.5%. Consumption of all three insecticides at all concentrations was equal to or greater than consumption of controls.

Document Type: Research Article

Publication date: December 1, 1989

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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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