A Model for Predicting Efficacy of Carbaryl Bait for Control of Rangeland Grasshoppers

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Abstract:

Three dosages of wheat bran bait (0.56, 1.12, and 1.68 kg/ha) containing 1.96% carbaryl by weight were applied by aircraft to infested rangeland. Percentage control of grasshoppers at 48 h after treatment averaged 42, 59, and 66 for the 3 respective doses. A mathematical model that assumed only 73% vulnerability to the bait predicted control to within 2 percentage points of observed averages. Efficiency of the bait was estimated at 0.16, or ca. 6 flakes/dead grasshopper. The model suggested that bait treatments could be made much more economical by increasing the efficiency of individual flakes and by reducing the rate of application.

Document Type: Research Article

Publication date: October 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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