Chiral specificity in responses by the bark beetleDendroctonus valens to host kairomones |
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Authors: | Kenneth R Hobson David L Wood Laurence G Cool Peter R White Toshikazu Ohtsuka Isao Kubo Eugene Zavarin |
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Affiliation: | (1) Department of Entomological Sciences, University of California, 94720 Berkeley, California;(2) Forest Products Laboratory, University of California, 94804 Richmond, California;(3) Department of Forest Resources, Utah State University, 84322-5215 Logan, Utah;(4) Present address: Forest Service Lab, USDA Forest Service, 860 N. 1200 E., 84321 Logan, Utah |
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Abstract: | The attraction of the red turpentine beetle,Dendroctonus valens, to the resin volatiles of its host,Pinus ponderosa, is elicited by three chiral monoterpenes. In field assays response was greatest to (S)-(–)--pinene; 92% (S)-(–)--pinene found inP ponderosa resin was not attractive. However, 75% (R)-(+)--pinene, which occurs inPinus lambertiana, a sympatric host ofD. valens, was attractive. (S)-(–)--Pinene interrupted response to (R)-(+)--pinene. (S)-(+)-3-Carene from both hosts was attractive at the (R)-(+)--pinene level. Three sympatric coniferous nonhosts each have the same attractive monoterpenes but produce less resin. These studies demonstrate the importance of chirality of host compounds in the host finding behavior of this bark beetle. |
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Keywords: | Dendroctonusvalens coleoptera Scolytidae host selection chiral enantiomer kairomone Pinus ponderosa -pinene" target="_blank">gif" alt="agr" align="BASELINE" BORDER="0">-pinene -pinene" target="_blank">gif" alt="beta" align="MIDDLE" BORDER="0">-pinene monoterpene olfaction |
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