Abstract
Abstract Acceptance of a potential host for oviposition by gravid female moths is believed to be predominantly determined by the physical and chemical cues on the substrate surface. We evaluated the effects of substrate physical and chemical stimuli on oviposition by the Indianmeal moth, Plodia interpunctella (Hubner) (Lepidoptera: Pyralidae), in a series of laboratory experiments. The experimental arenas were 5.7-liter plastic boxes that contained a single, uncovered 5-cm-diameter glass petri dish with either artificial substrates alone or artificial substrates applied with 0.1 g-equivalent of a hexane extract of wheat, Triticum aestivum L., or 10 g of wheat kernels. Presence of the chemical extract of wheat significantly increased P. interpunctella oviposition compared with physical stimuli without extract. A dish surface with spherical glass beads elicited significantly enhanced oviposition compared with surfaces with cheesecloth, filter paper, or sandpaper. Increasing the numbers of similar-sized extr...
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