Comparative rearing parameters for bisexual and genetic sexing strains of Zeugodacus cucurbitae and Bactrocera dorsalis (Diptera: Tephritidae) on an artificial diet

다국어 초록 (Multilingual Abstract)

The Sterile Insect Technique (SIT) is an important component of area wide programs to control invading orestablished populations of pestiferous tephritids. The SIT involves the production, sterilization, and release oflarge numbers of the target species, with the goal of obtaining sterile male x wild female matings, which yieldinfertile eggs. A major advance in SIT involved sex-linked, genetic manipulations that allowed the productionand release of male-only strains (also termed genetic sexing strains, GSS). The use of GSS avoids matings betweensterile males and females, which may divert males from seeking and mating with wild females, and studiesshow that male-only releases result in greater suppression of wild populations than standard bisexual releases(i.e., those including both males and females). GSS based on sex-linked pupal color exist for Zeugodacus cucurbitae(Coquillett) and Bactrocera dorsalis (Hendel), two important agricultural pest species, but their rearingcharacteristics have not been documented in detail. The goal of the present study was to compare the pupal colorsexing and bisexual strains for each of these species with respect to important rearing parameters, including eggproduction and eclosion of larvae from eggs (egg hatch), pupal recovery, and weight, emergence rate, and flightability. In both species, most of these parameters were significantly greater for the bisexual strain than the GSS,and, for a given number of eggs, the production of flight-capable adults was approximately 2 times greater in thebisexual strains of both species. The potential usefulness of GSS in SIT against Z. cucurbitae and B. dorsalis isassessed based on these findings.

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