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An Evaluation of Alternative Insecticides to Diazinon for Control of Tephritid Fruit Flies (Diptera: Tephritidae) in Soil

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Diazinon has been used extensively in the past as part of California eradication programs for tephritid fruit flies (Diptera: Tephritidae) as a soil drench, but it is being phased out for this purpose in the United States. Therefore, in this study, the toxicity of Platinum, Force, Admire, Regent, and Warrior was estimated after application to sand and soil as drenches for control of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann); melon fly, Bactrocera cucurbitae (Coquillett); and oriental fruit fly, Bactrocera dorsalis (Hendel), in Hawaii. Susceptibility of each species differed. In sand, the order of toxicity at LC50 based on the 95% confidence limit overlap approach for C. capitata from most toxic to least toxic was diazinon > Force = Warrior > Admire = Platinum > Regent. The order of toxicity for B. dorsalis was diazinon > Platinum = Warrior = Force > Regent = Admire. The order of toxicity for B. cucurbitae was Warrior = diazinon > Force = Regent = Platinum = Admire. Based on the dose ratio method, Warrior was not significantly different at LC50 than diazinon for B. cucurbitae only. All other insecticides were significantly different from diazinon at LC50. Studies in sand were followed by an evaluation of specific concentrations of Warrior and Force in soil collected from two sites on the island of Kauai. Average concentrations that caused at least 95% mortality in soil in all three fruit fly species were 121 g active ingredient (AI)/ha for Force and 363 g (AI)/ha for Warrior compared with 182 g (AI)/ha for diazinon. These results indicate that Force and Warrior could be used as soil treatments for control of tephritid fruit flies.

Keywords: Bactrocera; Ceratitis; Force; Warrior; soil insecticides

Document Type: Research Article

Publication date: February 1, 2009

More about this publication?
  • 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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