Abstract

To investigate whether the informational value of herbivore-induced plant volatiles (HIPV) changes according to foraging conditions, eight populations of the predatory mite Neoseiulus womersleyi were reared under two conditions. The patch-leaving tendency was tested using kidney bean leaf disc in a wind tunnel as a mimic prey patch. When predators were reared under unstable rearing conditions, patch-leaving tendencies were increased by HIPV in the airflow. Patch-leaving tendencies of predators reared under stable rearing conditions were not affected by the HIPV. These results suggest that the informational value of HIPV in a predator's patch-leaving decision would differ depending on foraging conditions.

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