Patch Retention Time in an Omnivore, Dicyphus hesperus is Dependent on Both Host Plant and Prey Type |
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| Authors: | Sherah L VanLaerhoven David R Gillespie Bernard D Roitberg |
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| Institution: | (1) Department of Biology, University of Windsor, Rm 119 Bio, 401 Sunset Avenue, Windsor, ON, Canada, N9B 3P4;(2) Pacific Agri-Food Research Center, Agriculture and Agri-Food Canada, P.O. Box 1000, Agassiz, BC, Canada, V0M 1A0;(3) Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, Canada, V5A 1S6 |
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| Abstract: | We examined patch residence times for an omnivorous predator, Dicyphus hesperus on a variety of plants and prey. Individual D. hesperus were placed in cages containing either mullein, tomato, pepper or chrysanthemum plants, and either no prey, Mediterranean flour moth eggs, greenhouse whitefly pupae or two-spotted spider mite adults. Patch residence times were typically greater than 24 h. The probability of remaining on the patch was greatest on mullein and tomato, followed by chrysanthemum and least on pepper, whereas probability of remaining on the patch was greatest when flour moth eggs were present, and least when no prey were available. Patch residence time in D. hesperus was determined by both the prey, and the species of plant, in an independent fashion. Our results reinforce the notion that for omnivores, the patch itself is as important as the prey that it harbors. |
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| Keywords: | Heteroptera Miridae biological control retention arrestment |
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