Apologies if the photo quality is insufficient. In a particular bit of forest, I found an area with a large birch population that all seemed to be suffering from the same issue. Something is causing the leaves to first stripe green and yellow, then turn brown/black, and while there are new leaf buds forming, trees are seemingly losing the leaves faster than they can replace them. There are other areas with birch trees on the same forest that don’t have this issue at all. In the affected area, some trees have only one or two leaves left with any green in them at all.
This is in New England, USA
Sadly the birch tree borer is wrecking havoc on the birch trees. Where I am in the Midwest, we have completely dead forests from that stupid bug.
That’s kind of what I was wondering, the bronze birch borer has been expanding its range and it’s definitely in some areas around my state already
Do you know if neem is effective against them?