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Effect of physiological factors on the flight ability of Calliptamus italicus L

K. Cao,Ji-wei Mai,Qiong Liu,J. Dou,Qiu‐Zhong Wen,Xiao Chen,Hongjiang Xiao,R. Jashenko,Rong Ji

Published 2019 in Physiological entomology (Print)

ABSTRACT

Calliptamus italicus L. is a major migratory pest that often causes serious agricultural losses in the desert/semi‐desert steppe of Central Asia. The present study aims to understand the physiological factors that affect migration of C. italicus by examining the relationships between flight capacity, energy accumulation, ovarian development and Juvenile hormone (JH) titre. The results show that flight capacity decreases with age, being greatest among 2‐day‐old males and lowest among 13‐day‐old locusts. There is no significant correlation between energy accumulation and flight capacity, although JH titre is negatively correlated with flight capacity. Energy accumulation and flight capacity first increases then decreases in 1–13‐day‐old females. Glycogen accumulation is significantly correlated with flight speed, and triglyceride accumulation is significantly correlated with flight distance, duration and speed. Changes in JH titre in 1–13‐day‐old females show double titre peaks, which are negatively correlated with flight capacity. Seven‐day‐old C. italicus have the highest glycogen and triglyceride accumulation, greatest flight capacity, grade II ovarian development and lowest JH titre. By contrast, 13‐day‐old C. italicus have the lowest triglyceride accumulation, lowest flight capacity, grade IV ovarian development and lowest JH titre. Taken together, these findings demonstrate that there is a trade‐off between ovarian development and flight capacity of C. italicus.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Physiological entomology (Print)

  • Publication date

    2019-07-30

  • Fields of study

    Agricultural and Food Sciences, Biology

  • Identifiers
    DOI 10.1111/phen.12298
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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