Raspberry ketone-supplemented diet has no effect on fitness parameters or lure responsiveness in male melon flies, Zeugodacus cucurbitae (Diptera: Tephritidae)
Abstract The male annihilation technique (MAT) and sterile insect technique (SIT) are often used to control pestiferous tephritid fruit flies (Diptera: Tephritidae). MAT involves the deployment of traps containing a male attractant and insecticide with the goal of drastically reducing male abundance and ultimately eliminating the entire population. SIT, which involves the mass production, sterilization, and release of the target species, may also be implemented to achieve final extirpation. Generally, simultaneous implementation of MAT and SIT is counterproductive, because the presence of large numbers of male-specific traps in the environment (MAT) would greatly reduce the number of sterile males available for copulating with wild females (SIT). However, studies on the Queensland fruit fly, Bactrocera tryoni (Froggatt), indicate that concurrent use of MAT and SIT may be feasible. Sexually mature males of B. tryoni are attracted to the raspberry ketone and its synthetic analogue cue-lure. Males of B. tryoni fed raspberry-ketone-supplemented diet when newly emerged showed lower attraction to cue-lure baited traps than control males. In addition, newly emerged males provided this diet displayed accelerated sexual maturation, which would allow the early release of sterile males and reduce pre-release holding costs. Here, we examined whether the addition of raspberry ketone to the adult diet of male melon flies, Zeugodacus cucurbitae (Coquillett), produced effects similar to those observed for B. tryoni . Despite using similar methods, no significant effect of raspberry ketone-supplemented diet on time to sexual maturity, survival, mating competitiveness, or attraction to cue-lure baited traps in mass-reared Z . cucurbitae males. Highlights Feeding Zeugodacus cucurbitae males raspberry ketone supplemented diet did not affect time to sexual maturation. Raspberry ketone supplemented diet did not affect responsiveness to cue-lure baited traps in male Zeugodacus cucurbitae . Survival of male Zeugodacus cucurbitae was not influenced by feeding on a raspberry ketone supplemented diet. Raspberry ketone enhanced diet did not impact mating competitiveness in male Zeugodacus cucurbitae . Graphical abstract [DISPLAY OMISSION]
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