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1 June 2005 Response of the Beetle Hylastinus obscurus Marsham (Coleoptera: Scolytidae) to Red Clover (Trifolium pratense L.) Volatiles in a Laboratory Olfactometer
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Abstract

The response of field-collected Hylastinus obscurus Marsham (Coleoptera: Scolytidae) to volatiles from Trifolium pratense L. of different ages was studied in a four-arm olfactometer. Volatiles from 1.5-, 2-, and 2.5-yr-old plants were more attractive than volatiles from 1-, 3-, and 3.5-yr-old plants. Two-year-old plants were preferred during winter, spring, and summer. One-year-old plants were not preferred in their early stages, but preference increased as they aged. Volatiles from 3-yr-old plants were never preferred. The essential oils obtained from 2-yr-old T. pratense elicited an attraction response from H. obscurus. Beetle response is discussed in relation to host-locating behavior.

Andrés Quiroz, Fernando Ortega, Claudio C. Ramírez, L. J. Wadhams, and Karina Pinilla "Response of the Beetle Hylastinus obscurus Marsham (Coleoptera: Scolytidae) to Red Clover (Trifolium pratense L.) Volatiles in a Laboratory Olfactometer," Environmental Entomology 34(3), 690-695, (1 June 2005). https://doi.org/10.1603/0046-225X-34.3.690
Received: 19 December 2003; Accepted: 1 December 2004; Published: 1 June 2005
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