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The wasps are a natural predator of the emerald ash borer, an invasive beetle that has killed tens of millions of ash trees in Illinois and 12 other states. "The borer... makes a zig-zag pattern," said Speckan.Will emerald ash borer survive the winter?
Winter temperatures of approximately −38 °C (−36 °F) limit range expansion., and overwintering emerald ash borer survive down to average temperatures of −30 °C (−22 °F) because of antifreeze chemicals in the body and insulation provided by tree bark.Is the emerald ash borer a lethal beetle?
Emerald ash borer adult beetles fly during the summer and lay eggs on ash trees. Once hatched, the larvae Emerald ash borer is a lethal threat to ash in our state.Where did this emerald ash borer come from?
The Emerald Ash Borer (EAB) is actually native to Asia including China, Korea, and Japan. In its native land it does feed on native asian ash trees. However, the ash trees there seem more resistant to this beetle. In Asia, there are also several predators that have co-evolved with these beetles.