Environmental Entomology (2005) 34, 690-695

Andrés Quiroz, Fernando Ortega, Claudio C. Ramírez, L.J. Wadhams and Karina Pinilla (2005)
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
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.
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Database assignments for author(s): Claudio C. Ramirez

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
pheromones/attractants/traps

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Hylastinus obscurus	Clover (Trifolium)	Chile (continental)