Canadian Forest Service Publications
The overwintering physiology of the emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae). 2011. Crosthwaite, J.C.; Sobek, S.; Lyons, D.B.; Bernards,M.A.; Sinclair, B.J. Journal of Insect Physiology 57:166-173.
Available from: Great Lakes Forestry Centre
Catalog ID: 35825
CFS Availability: PDF (request by e-mail)
Available from the Journal's Web site. †
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Ability to survive cold is an important factor in determining northern range limits of insects. The emerald ash borer [Agrilus pianipennis) is an invasive beetle introduced from Asia that is causing extensive damage to ash trees in North America, but little is known about its cold tolerance. Herein, the cold tolerance strategy and mechanisms involved in the cold tolerance of the emerald ash borer were investigated, and seasonal changes in these mechanisms monitored. The majority of emerald ash borers survive winter as freeze-intolerant prepupae. In winter, A. pianipennis prepupae have low supercooling points (-30 C), which they achieve by accumulating high concentrations of glycerol (4 M) in their body fluids and by the synthesis of antifreeze agents. Cuticular waxes reduce inoculation from external ice. This is the first comprehensive study of seasonal changes In cold tolerance in a buprestid beetle.
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