Effectiveness of polyethylene sheeting in controlling spruce beetles (Coleoptera: Scolytidae) in infested stacks of spruce firewood in Alaska
Contents Holsten, Edward H.; Werner, Richard A. 1993. Effectiveness of polyethylene sheeting in controlling spruce beetles (Coleoptera: Scolytidae) in infested stacks of spruce firewood in Alaska. Res. Pap. PNW-RP-466. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 6 p. Covering stacks of spruce firewood with either clear or black polyethylene sheeting does not raise log temperatures high enough to kill spruce beetle brood in the logs. Based on
... the logs. Based on the results of this study, we do not recommend the use of polyethylene sheeting as a remedial measure for the reduction of spruce beetle brood in infested firewood or log decks in south-central Alaska. The objective of this study was to evaluate the effectiveness of clear and black polyethylene sheeting in raising the temperature of stacks of beetle-infested spruce firewood to kill spruce beetle brood. Ambient temperature and temperatures of the bark surface and inner bark of logs on the top, outside middle, and inside middle of the stacks of firewood were compared for stacks with and without polyethylene. Higher bark surface temperatures were obtained under the clear polyethylene sheeting (36 °C) than under the black sheeting (27 °C) or in the uncovered check stacks (30 °C). The highest inner bark temperature of 30 °C was from the uncovered check stack; however, this was not lethal to spruce beetle brood.