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.
The lake side of my property is filled with ash trees that are about 12 to 20 inches in diameter. I’m wondering what I should plant to replace them when they start dying. I was thinking about a few tamaracks.