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Flight arrestment of tethered Dendroctonus pseudotsugae and Trypodendron lineatum (Coleoptera : Scolytidae) in response to olfactory stimuli



Flight arrestment of tethered Dendroctonus pseudotsugae and Trypodendron lineatum (Coleoptera : Scolytidae) in response to olfactory stimuli



Annals of the Entomological Society of America 64(6): 1273-1286



The flight and arrestment responses of male T. lineatum and male and female D. pseudotsugae beetles were analysed by means of an automatically recording flight mill . Before an arrestment response to female frass could occur, males of T. lineatum required 30 minutes' flight exercise and those of D. pseudotsugae 90 minutes. No response to frass was obtained from female D. pseudotsugae even after flight exercise, but both male and female D. pseudotsugae responded to the odour of Pseudotsuga menziesii phloem tissue; it is suggested that females may detect some insect-produced 'masking' compound in the frass. The role of the arrestment response in host selection by scolytids is discussed.

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Accession: 014482094

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DOI: 10.1093/aesa/64.6.1273


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