Orientation behaviour of the predatory hemipteran Perillus bioculatus to plant and prey odours |
| |
Authors: | Joop JA van Loon Eline W de Vos and Marcel Dicke |
| |
Institution: | (1) Laboratory of Entomology, Wageningen Agricultural University, P.O. Box 8031, 6700 EH Wageningen;(2) The Netherlands;(3) The Netherlands |
| |
Abstract: | The pentatomid predator P. bioculatus responded by positive odour-conditioned anemotaxis when exposed to airborne volatiles emitted by potato plants damaged by Colorado potato beetle larvae, whereas intact potato plants and non-feeding larvae as odour sources failed to elicit anemotaxis. Walking tracks of adult predators had higher values of straightness and upwind fixation when odours emanating from mechanically damaged plants were encountered than tracks registered in response to air carrying volatiles from intact plants, but these parameters returned to control values within 1–2 h after damage was caused. In contrast, air led over plants damaged by beetle larvae elicited orientation responses at least 3 hours after feeding damage ceased. The combination of chemical data on headspace composition, olfactory sensitivity established in electro-antennogram studies and behavioural data presented here imply a role of sesquiterpenoid plant volatiles as odorous cues eliciting attraction of this predator to damaged potato plants. |
| |
Keywords: | anemotaxis predation prey searching odours tritrophic interactions Perillus bioculatus Leptinotarsa decemlineata |
本文献已被 SpringerLink 等数据库收录! |