In June 2009 a research report on Ash tree treatment for the Emerald Ash Borer (EAB) was published by scientific investigators from Ohio State University, Purdue University, Michigan State University and University of Michigan, and University of Illinois.
Their findings identified the most effective treatment for the Emerald Ash Borer (EAB) was emmamectin benzoate.
“A new product that is effective for two years or even longer (emamectin benzoate) has altered the economics of treating ash trees…
Emamectin benzoate is the only product tested to date that controls EAB for more than one year with a single application.
It also provided a higher level of control than other products in side-by-side studies.”
You can read the entire report by clicking on the report cover below.
Insecticide options for protecting ash trees from emerald ash borer. North Central IPM Center Bulletin. 12 pp.

Emmamectin benzoate is applied using tree injection. Learn more about tree injection here. http://www.arborjet.com