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Psyche
Volume 2012 (2012), Article ID 290102, 8 pages
http://dx.doi.org/10.1155/2012/290102
Research Article

Biology of Omaspides pallidipennis Boheman, 1854 (Coleoptera: Chrysomelidae: Cassidinae)

1Programa de Pós-graduação em Ecologia, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
2Laboratório de Zoologia, Centro Universitário de Lavras, 37200-000 Lavras, MG, Brazil

Received 30 August 2012; Accepted 8 October 2012

Academic Editor: Kleber Del-Claro

Copyright © 2012 Paula A. A. Gomes et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The biology and the feeding habits of the subsocial species Omaspides pallidipennis were studied at the Floresta Nacional de Passa Quatro, MG, Brazil, during the period from October 2010 to April 2011. The species was bivoltine, beginning its reproductive and food cycle in October (spring) and seeking its diapause sites in April (autumn). The juveniles took 54.4 days on average to complete their development, a period in which the female remained close to offspring, only feeding during the larval stage of the juveniles. It is a monophagous species, feeding only on Ipomoea alba Linnaeus (Convolvulaceae). In the first cycle, the average number of eggs was eggs per egg cluster ( ,837 eggs in 33 clusters) and in the second it was eggs per egg cluster ( ,607 eggs in 91 clusters). Oviposition peaks were observed in the months of November and February. The average durations of the incubation period and the larval and the pupal development in the first cycle were ; ; days, respectively. In the second cycle they wrere ; ; days, respectively.