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22 February 2017 Comparative Evaluation of Development and Reproductive Capacity of Two Biotypes of Lilioceris cheni (Coleoptera: Chrysomelidae), Biological Control Agents of Air Potato (Dioscorea Bulbifera) in Florida
Veronica Manrique, Ellen C. Lake, Melissa C. Smith, Rodrigo Diaz, Carly Franko, Paul D. Pratt, Min B. Rayamajhi, William A. Overholt
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Abstract

A Chinese biotype of Lilioceris cheni Gressitt and Kimoto (Coleoptera: Chrysomelidae) is being mass reared and released in Florida for biological control of the invasive air potato vine, Dioscorea bulbifera L. (Dioscoreales). Another biotype from Nepal is under investigation for determining whether its release would benefit the ongoing biological control program. We compared temperature-dependent development, fecundity, life table parameters, and consumption of the two biotypes in the laboratory. Both biotypes completed development at 20–30 °C, although survival of Chinese beetles was higher at 20 °C and 27.5 °C, and survival of Nepalese beetles was higher at 30 °C. In addition, Nepalese beetles developed at a faster rate at 20 °C, and consumed air potato foliage at a higher rate at 25 °C. The most important difference between the biotypes, with regard to biological control purposes, was the shorter generation time of Nepalese beetles, which resulted in a higher intrinsic rate of population increase, despite much higher fecundity of Chinese beetles. The higher intrinsic rate of increase of the Nepalese beetles may allow a more rapid population increase in the field, and thus, greater damage to air potato plants. However, differences in other life history traits, such as overwintering ability, diapause, and cold tolerance, will also influence field performance.

© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
Veronica Manrique, Ellen C. Lake, Melissa C. Smith, Rodrigo Diaz, Carly Franko, Paul D. Pratt, Min B. Rayamajhi, and William A. Overholt "Comparative Evaluation of Development and Reproductive Capacity of Two Biotypes of Lilioceris cheni (Coleoptera: Chrysomelidae), Biological Control Agents of Air Potato (Dioscorea Bulbifera) in Florida," Annals of the Entomological Society of America 110(3), 310-316, (22 February 2017). https://doi.org/10.1093/aesa/saw100
Received: 15 July 2016; Accepted: 15 December 2016; Published: 22 February 2017
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KEYWORDS
biological control
fertility life table
Insect biotype
temperature-dependent development
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