ST. PAUL, Minn. (AP) - Minnesota is plotting its next steps in the fight to stop the spread of emerald ash borers.
The Minnesota Department of
Agriculture says it's drawing on innovative research from the University
of Minnesota and the U.S. Forest Service to attack the tree pests using
their natural enemies - stingless wasps that prey on emerald ash
borers.
The Forest Service is studying
how well the wasps, as well as emerald ash borers, tolerate cold
winters. At the same time, university researchers are studying how far
the stingless wasps can fly.
MDA Biological Control
Coordinator Monika Chandler says the data will help officials determine
how best to deploy the stingless wasps against ash borer infestations.
Emerald ash borers have killed millions of trees since they arrived in North America in the 1990s.