Long handling times of Praon unicum by Harmonia axyridis result in protection from predation.
Simon, F.W. and Gillespie, D.R. (2014). "Long handling times of Praon unicum by Harmonia axyridis result in protection from predation.", Journal of Applied Entomology, 138(7), pp. 551-554. doi : 10.1111/jen.12099 Access to full text
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 A. matricariae 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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