A section of bark was removed from an ash tree in St. Anthony Park in July of 2009. It was an attempt to draw adult Emerald ash borers, which are attracted by weakened trees. (MPR Photo/Stephanie Hemphill)
A new foil for the emerald ash borer
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Emerald ash borers are expected to spread in Minnesota. But Minnesota plant scientists may introduce a natural enemy to the ash borer later this summer: it's a tiny wasp whose young feed on the slightly larger emerald ash borer larvae.
Guests
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Val Cervenka: Forest health program leader and forest entomologist with Minnesota Department of Natural Resources.
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Geir Friisoe: Division director for plant protection at the Minnesota Department of Agriculture.
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