Department of Entomological Sciences, University of California, 94720, Berkeley, California.
J Chem Ecol. 1993 Sep;19(9):1837-46. doi: 10.1007/BF00983790.
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)-(-)-β-pinene; 92% (S)-(-)-α-pinene found inP ponderosa resin was not attractive. However, 75% (R)-(+)-α-pinene, which occurs inPinus lambertiana, a sympatric host ofD. valens, was attractive. (S)-(-)-α-Pinene interrupted response to (R)-(+)-α-pinene. (S)-(+)-3-Carene from both hosts was attractive at the (R)-(+)-α-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.
红脂大小蠹对其宿主白皮松的松脂挥发物具有吸引力，这种吸引力是由三种手性单萜化合物引起的。在野外试验中，（S）-（-）-β-蒎烯的反应最大；而在白皮松树脂中发现的 92%（S）-（-）-α-蒎烯没有吸引力。然而，在与红脂大小蠹同域的宿主湿地松中存在的 75%（R）-（+）-α-蒎烯是有吸引力的。（S）-（-）-α-蒎烯中断了对（R）-（+）-α-蒎烯的反应。来自两个宿主的（S）-（+）-3-蒈烯在（R）-（+）-α-蒎烯水平上具有吸引力。三种同域的针叶树非宿主都具有相同的有吸引力的单萜化合物，但产生的树脂较少。这些研究表明了宿主化合物的手性在这种树皮甲虫的宿主寻找行为中的重要性。
