Bayer makes a drench that works, I hear. Purdue extension service may be able to put you in touch with someone more knowledgeable.On the other hand it was a pleasure, when I arrived home, to re-meet our city's head Arborist and Horticultural boss.
He greeted me by name.
He was here for his monthly inspection of my ash tree.
I found out that my uninfected ash tree has a serial number and a GPS location recorded.
I first met him last year when my wife called me to the front door, "Talk to this guy. He wants to cut down our maple tree at the street."
My first words to him when we met were, "You Bast**d! WHY!?!" He was used to fielding complaints, though.
Our (stunning in the fall) red maple was tearing up the sidewalk and creating problems for handicap access compliance. It was a large maple, so they do that stuff.
Jokingly I suggested they move the sidewalk.
Soon after they were there, whipping my tree to shreds. I kept a decent stack of BBQ wood though.
My ash tree today got a 100% uninfected rating again. I asked what I could do to help preserve it and keep it healthy.
He says, "Sir, I wish I knew."