Laboratory bioassays were conducted to evaluate the effect of spinosad bait (GF-120) on three species of tephritid fruit fly parasitoids, Fopius arisanus (Sonan), an egg-larval parasitoid of oriental fruit fly, Bactrocera dorsalis (Hendel), Diachasmimorpha tryoni (Cameron), larval parasitoid of Ceratitis capitata (Wiedemann), and Dirhinus giffardii Silvestri pupal ectoparasitoid of Bactrocera cucurbitae (Coquillet). Testing GF-120 showed that 12.5 ppm, 14.1 ppm, 13.9 ppm, 12.6 ppm of spinosad were enough to kill 50% of female and male D. tryoni and F. arisanus after 24 hours of exposure, respectively. These results may have important implications for decisions concerning best chemicals suited for reducing pest damage while conserving natural enemies in agricultural systems.
Species 1: Diptera Tephritidae Bactrocera dorsalis (oriental fruit fly)
Species 2: Diptera Tephritidae Ceratitis capitata (Mediterranean fruit fly)
Species 3: Diptera Tephritidae Bactrocera cucurbitae (melon fly)
Keywords: spinosad, bait
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