No CrossRef data available.
Published online by Cambridge University Press: 19 November 2024
Southern pine beetle, Dendroctonus frontalis Zimmermann (Coleoptera: Curculionidae: Scolytinae), has expanded its range further into northeastern United States pitch pine (Pinus rigida Miller) (Pinaceae) forests and established populations on Long Island, New York, since 2014. Although rare, small plantations of eastern white pine, Pinus strobus Linnaeus (Pinaceae), also occur on Long Island and may be attacked by D. frontalis, providing opportunities to assess economic and ecological impacts of the beetle in an uncommon host. We sampled overstorey tree health in three P. strobus stands to assess stand-level damage caused by D. frontalis and documented D. frontalis attack density and brood gallery estimates in P. rigida and P. strobus. Dendroctonus frontalis attacked 37–55% of trees in the stands. Attack density, successful brood galleries, and brood gallery length were higher in P. rigida than in P. strobus. There was variation in these variables among four heights on tree boles. No difference was found for unsuccessful galleries between the two pine species. Information on D. frontalis behaviour and colonisation success in regionally abundant stands of P. strobus will be helpful in assessing risk to the region.
Subject editor: Jon Sweeney