During the 20th century, protein bait sprays with insecticides have been one of the most popular and effective methods for controlling fruit flies (Melon fruit fly, Bactrocera cucurbitae (Coquillet), Oriental fruit fly, B. dorsalis (Hendel), and Mediterranean fruit fly, Ceratitis capitata (Weideman)). GF-120, a proteinaceous bait spray (DowAgrosciences, Indianapolis, IN), is a spinosad insecticide shown by some researchers to be less harmful to non-targets than malathion. However, the potential for negative impacts upon non-target insects remains. We assessed these potential impacts in two Hawaiian environments: native ohia forest and strawberry guava forest. Two 110 m transects, separated by a minimum of 200 m, were set up within each forest type. Vegetation was identified and assessed along transects to ensure similar species diversities within each forest type sampled. McPhail traps and bucket traps were placed in an alternating sequence every 5 m along each transect. Treatments of GF-120 were applied to one transect within each forest type, controls consisted of the second transect where no treatment applications were applied. Types of insects captured in the two forests were significantly different (P < 0.05). The types of insects captured significantly differed (P < 0.05) between treatments and controls. However, no significant difference (P < 0.05) was identified in the total number of insects captured in GF-120 treated versus control areas.
Species 1: Diptera Tephritidae Bactrocera cucurbitae (Melon fruit fly)
Species 2: Diptera Tephritidae Bactrocera dorsalis (Oriental fruit fly)
Species 3: Diptera Tephritidae Ceratitis capitata (Mediterranean fruit fly)
Keywords: protein bait, nontarget insect
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