The Emerald Ash Borer (EAB) has currently been found in Keokuk, Mahaska, Marion, Polk and Wapello counties in Iowa. According to the Iowa Department of Natural Resources’ website, trees that are attacked by the Emerald Ash Borer can die within two years. Iowa State University Extension suggestions preventative treatment of ash trees within a 15 mile radius of a known EAB infestation. Spring is the time to treat for EAB.
Prevention and treatment IS possible. Independent university studies¹ have shown TREE-äge from Arborjet to be the most effective treatment of Emerald Ash Borer.
Treatment cost varies with the size and number of trees and is based on the diameter at breast height (DBH), please call us at 641.295.1239 or email us at firstname.lastname@example.org for an exact quote.
Note: Treat trees as a preventative measure before an infestation sets in for better results and healthier trees. There is a significant delay from the time damage is done to the vascular tissue and symptoms are visible in the canopy.
Trunk Injection Treatments
Trunk injection application with TREE-äge® (emamectin benzoate) insecticide RECOMMENDED
A precise dose is applied and sealed inside each tree, eliminating the need for chemical applications to the soil or foliage. Safe and more environmentally friendly.
TREE-äge® is used by the USDA Forest Service and city forester in Chicago, Milwaukee, and many other municipalities.
EAB is an invasive pest introduced from Asia that attacks ash trees (Fraxinus spp.). The wood-boring beetle was found in parts of the Eastern U.S. and Canada in 2002 and continued to spread to neighboring areas.
EAB overwinter in Iowa as a larvae just under the bark. In late spring, they pupate and emerge as an adult beetle through a D-shaped hole in the bark about 1/8” in diameter. The adult is a small, metallic green beetle that feeds on the trees’s canopy leaves before reproducing and laying eggs in the cracks of the bark. The eggs hatch into larvae which burrow through the bark into the tree where they continue to feed in a serpentine pattern until fall.
Iowa State University Extension entomologists recommend having your ash trees checked or treated if you are located within 15 miles of an EAB infestation to prevent this destructive pest.
When to Treat
SPRING -Best time to treat for EAB. Uptake of pesticide is fastest as trees are actively transpiring after a full canopy is developed. Spring treatment will prevent adult EAB beetles from feeding and laying eggs in and on your trees.
SUMMER -After the beetle eggs have hatched, summer treatments will kill the larvae feeding under the bark. Treatments are limited to days with mild to moderate temperatures with sunshine.
FALL -EAB larvae are actively feeding on the tree’s vital vascular tissue. Damage done in the fall will not be noticeable until the next growing season when the canopy begins to leaf out. Treatments are possible up until the time when trees begin to go dormant for the winter.
¹ Insecticide Options for Protecting Ash Trees from Emerald Ash Borer. Herms (The Ohio State University), McCullough (Michigan State University), Smitley (Michigan State University), Sadof (Purdue University),Williamson (University of Wisconsin-Madison & University of Wisconsin at Urbana-Champaign). 2009