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Background Selection of suitable predators for the control of the spider mite,  Panonychus citri  is always a challenge due to the lack of their reliable predicted efficacy. In this laboratory study, biological control potential of  Neoseiulus californicus ,  N. cucumeris  and  Scapulaseius newsami,  against  P. citri  using the “Relative Control Potential” (RCP) metric to compare their efficacies was evaluated. The functional response type was determined at different prey densities (after 24 h). Results The type II functional responses were observed from all the tested predators feeding on 3 different life stages of  P. citri , except  N. cucumeris,  which was fed only on eggs. All predatory mites preferred eggs of  P. citri  with a higher attack rate (1.397) in  N. cucumeris , followed by  N. californicus  (1.238) and  S. newsami  (0.975). Handling time was also lower in  N. cucumeris  than other mites, with a trend as: for  N. cucumeris , eggs &gt; adults &gt; immature stages; for  N. californicus , immature stages &gt; eggs &gt; adults, while for  S. newsami , eggs &gt; immature stages &gt; adults. The integration of greenhouse abundance and fecundity (%) data resulted in a higher RCP for  N. cucumeris  than other predators. Conclusion Neoseiulus cucumeris  was selected as the most suitable predatory mite for the control of  P. citri  with a higher RCP and potential to maximum reproduction.  S. newsami,  which was used for the first time, gave almost similar results compared to  N .  californicus  but with lower efficacy.

egyptian journal of biological pest control

Selection of suitable predatory mites against, Panonychus citri (McGregor) (Acari: Tetranychidae) using relative control potential metrics and functional response