Further attractasnts for the scolytid beetle, Taenoglyptes fulvus

In field tests, mentha-1,8-dien-4-ol, a major oxidation product of d-limonene with selenium dioxide, greatly increased activity for the scolytid beetle, Taenoglyptes fulvus (Cryphalus fulvus auct.). The attractant, however, does not seem to be contained in neutral host volatiles from fresh phloem of Pinus densiflora, and this suggests that it may be either a sort of pheromone of beetle origin or, if not, simply a mimic. Further detections of the oxidation products of pinenes, i.e. pinocarvone, trans-pinocarveol, and verbenone in the host volatiles, in addition to those of myrtenal and myrtenol are also described.