Steve from Wabash,indiana writes
I have been using your Criterion 75 WSP on my ash trees as a drench. Showing mixed results.
Please see our Emerald Ash Borer treatment page. Criterion 75 would still be a top product to use. The down fall is that when treating Emerald Ash Borer, you have to retreat every year.
Answer last updated on: 05/09/2014