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Detection of invasive populations of Bactrocera dorsalis relies on traps baited with the male-specific attractant methyl eugenol. Standard protocol involves applying 5 mL of liquid methyl eugenol (1% naled) to a cotton wick, which is then placed inside a Jackson trap. Because of the lure’s high volatility, the lure is replaced every 6 wk. Prolonging the lure’s longevity would increase trap servicing intervals and reduce associated costs. Conducted at 2 sites in Hawaii, the present study investigated the performance of weathered solid dispensers containing 3, 6, or 10 g of methyl eugenol, deployed with solid insecticidal strips, relative to freshly baited liquid-bearing cotton wicks. At the cooler site, the solid lure/toxicant combination captured as many males as the fresh liquid formulation for as long as 12 wk. At the warmer site, the solid lure/toxicant system had shorter longevity, apparently owing to the reduced effectiveness of the insecticidal strip over time. Sumario La deteccion de poblaciones invasoras de Bactrocera dorsalis se basa en trampas cebadas con el atrayente metil eugenol especifico para los machos. El protocolo estandar implica la aplicacion de 5 mL de metil eugenol liquido (naled al 1%) a una mecha de algodon, que luego se coloca dentro de una trampa Jackson. Se reemplaza el senuelo cada 6 semanas debido a la alta volatilidad del senuelo. Al prolongar la longevidad del senuelo aumentaria los intervalos de mantenimiento de las trampas y reduciria los costos asociados. Realizado en 2 sitios en Hawai, el presente estudio investigo el rendimiento de dispensadores de solidos desgastados que contienen 3, 6, o 10 g de metil eugenol, desplegados con tiras insecticidas solidas, en relacion con mechas de algodon con liquido recien cebado. En el lugar mas fresco, la combinacion de senuelo solido/toxico capturo tantos machos como la formulacion liquida fresca durante un periodo de hasta 12 semanas. En el sitio mas calido, el sistema de senuelo solido/toxico tuvo una longevidad mas corta, aparentemente debido a la menor efectividad de la tira de insecticida con el tiempo. Key Words: Bactrocera dorsalis; invasive species; male lure; detection View this article in BioOne

Field Capture of Male Oriental Fruit Flies (Diptera: Tephritidae) in Traps Baited with Solid Dispensers Containing Varying Amounts of Methyl Eugenol