The wasp and woodpeckers havent stopped anything in Minnesota. The plague is spreading and all over the metro dead ash trees are standing or being cut down.
They haven’t stopped the emerald ash borer plague in any other state either, this article is pure BS. The fact that it asserts that all is well because there are lots of little sapling ash trees is either meant to be misleading or just plain ignorance, i.e. emerald ash borers don’t go after saplings, and the saplings we have are those produced by the mature trees just before the beetles killed them.
What I understood it to say was that it took time for the bird and wasp population to catch up as they discovered the new food source.
Nor did they claim it was happening everywhere.
We still have plenty of dead ash on our property and evidence of ash borers.
But we do have woodpeckers, nuthatches, and parasitic wasps. And hopefully, they’ll help control the infestation somewhat.