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Flight of the Chinese white pine beetle (Coleoptera: Scolytidae) in relation to sex, body weight and energy reserve

Published online by Cambridge University Press:  20 October 2010

H. Chen ,
Z. Li ,
S.H. Bu  and
Z.Q. Tian
H. Chen*
Affiliation:
College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
Z. Li
Affiliation:
College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
S.H. Bu
Affiliation:
College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China
Z.Q. Tian
Affiliation:
Department of Foreign Languages, Northwest A&F University, Yangling, Shaanxi 712100, China
*
*Author for correspondence Fax: +86 29 87080157 E-mail: [email protected]
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Abstract

The flight distance, flight time and individual flight activities of males and females of Dendroctonus armandi were recorded during 96-h flight trials using a flight mill system. The body weight, glucose, glycogen and lipid content of four treatments (naturally emerged, starved, phloem-fed and water-fed) were compared among pre-flight, post-flight and unflown controls. There was no significant difference between males and females in total flight distance and flight time in a given 24-h period. The flight distance and flight time of females showed a significant linear decline as the tethered flying continued, but the sustained flight ability of females was better than that of males. The females had higher glycogen and lipid content than the males; however, there was no significant difference between both sexes in glucose content. Water-feeding and phloem-feeding had significant effects on longevity, survival days and flight potential of D. armandi, which resulted in longer feeding days, poorer flight potential and lower energy substrate content. Our results demonstrate that flight distances in general do not differ between water-fed and starved individuals, whereas phloem-fed females and males fly better than water-fed and starved individuals.

Keywords

Dendroctonus armandiflight performancebody sizeenergy reserve
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 101 , Issue 1 , February 2011 , pp. 53 - 62
Copyright
Copyright © Cambridge University Press 2010

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