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1 October 2012 Retail Firewood Can Transport Live Tree Pests
W. R. Jacobi, J. G. Hardin, B. A. Goodrich, C. M. Cleaver
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Untreated firewood can harbor destructive insects and pathogens and transport them to uninfested areas. In a national survey of retail locations selling firewood in 18 states, over half (52%) of the firewood was from sources out of the purchase state and 50% showed evidence of insect infestation. In a three state survey of southern Rocky Mountain retailers, the most common retailer types carrying firewood were grocery stores and department or big box stores followed by gas stations or convenience stores. In 2007–2009, we purchased 419 firewood bundles from retailers in Colorado, New Mexico, Utah, and Wyoming and caged the firewood to quantify insect emergence. Live insects emerged from 47% of firewood bundles over 18 mo of rearing time. Approximately 11 insects emerged on average from each infested bundle (1–520 per bundle). Pine, fir, and mixed-conifer bundles yielded the greatest number of insects. Beetles (Coleoptera) were prominent and made up the majority of individuals (3–60 individuals in each of 24 families). Most Coleoptera were bark and ambrosia beetles (subfamily Scolytinae) while wood borers (Buprestidae, Cerambycidae, Siricidae) occurred in lower numbers. Firewood with evidence of previous or current insect infestation was more likely to have insects emerge than firewood without such evidence. The risk of moving live native or nonindigenous insects in untreated firewood is high because insects emerged up to 558 d from purchase date. Retail firewood should be heat treated in a manner to eliminate insects that is uniformly accepted across North America.

© 2012 Entomological Society of America
W. R. Jacobi, J. G. Hardin, B. A. Goodrich, and C. M. Cleaver "Retail Firewood Can Transport Live Tree Pests," Journal of Economic Entomology 105(5), 1645-1658, (1 October 2012).
Received: 13 February 2012; Accepted: 1 June 2012; Published: 1 October 2012

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Asian longhorned beetle
bark beetle
emerald ash borer
exotic insect
wood borer
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