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Long handling times of Praon unicum by Harmonia axyridis result in protection from predation

Authors

  • F. W. Simon,

    Corresponding author
    1. Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada
    • Correspondence

      Franz W. Simon (corresponding author), Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada. E-mail: fsimon@sfu.ca

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  • D. R. Gillespie

    1. Agriculture and Agri-Food Canada, Agassiz, BC, Canada
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Abstract

The intraguild predator Harmonia axyridis has a longer handling time of Praon unicum mummies in contrast to Aphidius matricariae mummies and the pest aphid Myzus persicae. In addition, the rejection rate of P. unicum is higher as compared to the Amatricariae and M. persicae. Harmonia Axyridis also has a shorter residence times when foraging in P. unicum patches. The longer handling time may provide P. unicum with a refuge from intraguild predation by H. axyridis. Thus, Praon unicum could be a better biocontrol agent than A. matricariae in the presence of intraguild predation, as it will face lower predation rates.

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