Prevention first, which I understand doesn't help now, but it will in the Future.
Cides become "reverse placebos" really fast. People think they work, or are the cure, so they leave the tree for them to "work", but it wasn't needed in the first place, so the problem gets worse and they use cide B. The problem continues to get worse, but they are convinced the next cide will work. Apply. Still nothing. Then a thread on it. With the use of three chemicals. This is about the 5th one this season.
There have been about 4 threads recently with varying rates of the same kind of damage I've been finding and curing, simply by removing pill bugs from the soil.
This, looks like what my damage may have, if I didn't remove the bugs
I recently got validation in my "health to prevent" thoughts from W.P. , so I am sure I won't have to use cides ever, since my husbandry is also improving.
But further, there is a lot to be said about owning trees that don't fall victim to these problems. Local stuff.
We are too selfish in what we must have.
Here, mugo, spruce, shimpaku, kinda elms, are what lives with little worry of infection.
Remembering we are on a bigger earth, and remaining small, humble, goes a long way into the enjoyment of this hobby.
How does spraying shit on your trees that may give your children defects, cancer, the inability to fight off a new virus....ahem...allow for this to be the relaxing, enjoyable hobby this is supposed to be?
That's the kicker.
We say we do this for joy. We lie to ourselves.
Resorce.
Sorce