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Environ. Entomol. 33(2): 221-226 (2004) ABSTRACT The pine shoot beetle, Tomb pinipc~du (Coleoptera: Scolytidae), is an exotic pest of pine in North America. We evaluated blends of semiochemical disruptants, which included nonhost volatiles itnd verbenone, for their ability to disrupt attraction of T. pinipwda to traps baited with the attractant a-pinene and to Scots pine, Pinus srjlucstris L., trap logs. In Michigan and in Ontario, Canada, il single blend of nonhost volatiles alone (comprised of 1-hexanol, (2) -3-hexen-1-01, (E) -2-hexen-1-01, 3-octanol, and 1-octen-3-01) or the nonhost volatile blend combined with verbenone significantly reduced attraction of T. pinipc~rla to attractant-baited trays by 68-77%. Similarly, verbenone plus the nonhost volatile blend or a similar blend without I-octen-3-01 also significantly reduced attack density of 7'. piniperda on pine trap logs by 56-74% in both Michigan and Ontario. Although relative responses between the different blends were slightly different between Michigan and Ontario, the recom- mended operational disruptant consisted of I-hexanol, (2)-3-hexen-1-01, (E)-2-hexen-1-ol,3-octanol, and verbenone.

Semiochemical Disruption of the Pine Shoot Beetle, <I>Tomicus piniperda</I> (Coleoptera: Scolytidae)