Semiochemical disruption of the pine shoot beetle, Tomicus piniperda (Coleoptera: Scolytidae)

The pine shoot beetle, Tomicus piniperda (Coleoptera: Scolytidae), is an exotic pest of pine in North America. We evaluated blends of senriochemical disruptants, which included nonhost volatiles and verbenone, for their ability to disrupt attraction of T pimperda to traps baited with the attractant a-pinene and to Scots pine, Pinus sylvestris L., trap logs. In Michigan and in Ontario, Canada, a single blend of nonhost volatiles alone [comprised of 1-hexanol, (Z)-3-hexen-1-ol, (E) -2-hexen-1-ol, 3-octanol, and 1-octen-3-ol] or the nonhost volatile blend combined with verbenone significantly reduced attraction of T piniperda to attractant-baited traps by 68-77%. Similarly, verbenone plus the nonhost volatile blend or a similar blend without 1-octen-3-ol also significantly reduced attack density of T 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 recommended operational disruptant consisted of 1-hexanol, (Z)-3-hexen-1-ol, (E)-2-hexen-l-ol, 3-octanol, and verbenone.