In some biological programs, multiple predator species are released to control a single prey species. While in some cases release of multiple species may provide a better control, in other cases species may interact with each other with possible negative outcome on biological control program. In this study, intraguild predation was assessed among three phytoseiid species, Amblyseius swirskii (Athias-Henriot), Neoseiulus barkeri (Hughes) and Phytoseiulus persimilis Athias-Henriot under laboratory conditions in either absence or presence of Tetranychus urticae Koch and/or pollen. Adult females of all three predator species exhibited higher predation rate on larvae than on the other immature stages. Phytoseiulus persimilis did not feed on the nymphal stages of the other two phytoseiid species, while A. swirskii and N. barkeri fed on all juvenile stages of the two others. Females of A. swirskii consumed more phytoseiid larvae than did the other two species. However, the predation of females of the three species on immature stages decreased significantly when prey/food was added to experimental units. Our results suggest that the three species, A. swirskii, N. barkeri and P. persimilis are potentially prone to intraguild interactions with each other, and A. swirskii is the strongest intraguild predator. The results of this study may be helpful in selecting effective biological control strategies against spider mites.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 21 • No. 4