Α-pinene
Guides
Hylastes opacus
crenulate bark beetle
Hylastes opacus is a bark beetle in the family Curculionidae, subfamily Scolytinae, native to the Palearctic region and recently introduced to North America. The species breeds in stumps and roots of dead or dying pines (Pinus) and occasionally other conifers. Adults use host volatiles as chemical cues to locate suitable breeding material, with documented attraction to nonanal, ethanol, and (-)-α-pinene. The species has been recorded in North American locations including Vermont and New York.