An understanding of the impact of acaricides on predatory mites is crucial for integrated pest management (IPM) programs. The present study evaluated the sublethal effect of spirodiclofen on life table parameters of the subsequent generation of the predatory mite, Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) fed on Tetranychus urticae Koch under laboratory conditions. The sublethal concentrations LC10, LC20 and LC30 were determined based on a dose-effect assay. Exposure to the sublethal concentrations of spirodiclofen had no significant effects on developmental time of offspring of treated mites. Compared with LC10 treatment, the oviposition period of treated mites with LC20 and LC30 concentrations decreased significantly. The intrinsic rate of increase (r), finite rate of increase (λ) and net reproductive rate (R0) were not affected by sublethal concentration. Our results suggest that sublethal concentrations of spirodiclofen may not affect the population parameters of offspring from treated A. swirskii.
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. 3