emerald ash borer
would like to know your advise on protecting my very large ash tree from emerald ash borer. I had Kevin from Eagan Forestry come out. It is currently not infected from what we can tell. I have been treating it for the last 10 years with a product from Gertens, a product by Green light called emerald ash borer killer. The product is now discontinued. I bought a extra one. Kevin thought we should have it professionally treated. He feels the product is for smaller trees. our tree is 22 inches in diameter. Would like some advice.