Purple Ash Tree

Question

I have had the purple ash tree treated for emerald ash borer last year and leaves have been falling off all summer. Please tell me why. Thank you

Answer 1

Did you have your tree treated as a preventative or is it detected in your tree?
If your tree is suffering symptoms of stress or disease, I would have it inspected again.
You may want to check with your County Extension Office to check on the progress of EAB disease in your area.

“Autumn Purple” ash trees suffer from several problems. The emerald ash borer, an invading pest, kills infested ash trees within five years if not sooner. Other insect pests include lilac borers, carpenter worms, leaf miners, ash sawflies and ash leaf curl aphids. Nests constructed out of webbing appear in ash trees infested with webworms. These are especially visible in the fall. Plant diseases like fungal leaf spots, powdery mildew, rust, anthracnose, and cankers can cause serious problems for the “Autumn Purple” ash tree.
http://www.emeraldashborer.info/documents/Multistate_EAB_Insecticide_Fact_Sheet.pdf
https://www.gardeningknowhow.com/extension-search/