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Keep your Emerald Ash Borer plans in spite of cold weather

Published: January 8, 2014 by the Central Office

Contact(s): Bill McNee, DNR Forest Health Specialist, phone (920) 360-0942; Joanne Haas, public affairs manager, Division of Forestry, 608-209-8147. Photos available from Bill McNee; email address: bill.mcnee@wisconsin.gov

A forest health expert says the ongoing frigid air hugging the state is not enough to wipe out the tree-killing pest known as the Emerald Ash Borer.

It seems these guys have figured out how to take winter's cold shoulder.

Bill McNee of the Department of Natural Resources says experts predict that many EAB larvae will die, but the ash tree pest isn't going away. Their native habitat in eastern Asia experiences cold winters and the pest is adapted to them.

"They are somewhat protected beneath the tree bark and many of them will survive the recent cold temperatures," McNee says. "It will be a little warmer beneath the bark than the outdoor air temperature, and the wind chills do not affect them because they are sheltered."

McNee says experts predict that populations of the pest are likely to rebound this summer, since each female beetle that emerges this summer will lay 50-100 eggs.

At this point in time, it is not known if larval mortality will have any significant impact on Wisconsin's ash trees or significantly delay ash tree mortality. Forestry experts do not recommend changing EAB management plans solely due to the cold weather.

Additional information about Emerald Ash Borer, insecticide treatments and forest management can be found online at:

http://datcpservices.wisconsin.gov/eab/index.jsp

Last Revised: Wednesday, January 08, 2014

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