The relationship between temperature and the development of the West Indian sweet potato weevil, Euscepes postfasciatus, on an artificial larval diet containing powdered sweet potato root, was examined at different fixed temperatures from 22 to 31°C. The developmental periods for egg, larvae, and pupae stages shortened in correlation with increased temperature. The thermal constant was 769.2 degree-days and the developmental zero for female and male was 11.1 and 11.7°C, respectively. Although we can rear this weevil at temperatures ranging from 22 to 31°C, rearing temperatures should be kept between 25 and 28°C because the developmental stages were too long at 22°C and the larval period was delayed at 31°C. The basis for these developmental data will be a useful key factor in designing a plan to eradicate the weevil by using a mass-rearing system and SIT.
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I would like to thank Dr M. Sakakibara for valuable comments on the original manuscript. This study was supported by the progressive understanding and cooperation of the Okinawa Prefectural Government Fruit-Fly Eradication Project Office (current name Okinawa Prefectural Plant Protection Center).
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Shimoji, Y. Effect of temperature on the development of the West Indian sweet potato weevil, Euscepes postfasciatus (Fairmaire) (Coleoptera: Curculionidae) on an artificial diet. Appl Entomol Zool 46, 51–54 (2011). https://doi.org/10.1007/s13355-010-0006-x
- West Indian sweet potato weevil
- Euscepes postfasciatus
- Artificial diet
- Thermal constant
- Optimal temperature