A beetle from Asia was identified in July, 2002, as the cause of widespread ash (Fraxinus spp.) tree decline and mortality in southeastern Michigan and Windsor, Ontario, Canada. Larval feeding in the tissue between the bark and sapwood disrupts transport of nutrients and water in a tree, eventually causing branches and the entire tree to die. Tens of millions of ash trees in forest, rural, and urban areas have already been killed or are heavily infested by this pest.
Control options depend on the size of the tree and how much insect pressure there is.
For trees under 18” and under low insect pressure annual soil injections or bark sprays can be used.
For trees over 18” and areas with high insect pressure trunk injections with Emamectin benzoate are required.
“We weren’t there for the tree removal, but it was like they were never there. Just a tiny mulch pile. We were very happy with them.” Adam, Newmarket, NH