Trunk Injection Fact Sheet For EAB Control*

• Through trunk injection, small doses of insect control are carefully measured and injected directly into the tree’s transport tissues, enabling distribution within the tree, but limiting the impact to the environment.
• The best time to treat Ash trees in our area is from May through October when trees are most active, and water or nutrients are actively flowing in the tree. The larval (damaging) stage of EAB does its worst from August through October.
• Injections are made in the bottom 18 inches of the tree, at intervals of around 6” apart. The depth for the injection is between 5/8” and 1  5/8” into the tree. A 10” diameter tree would receive approximately a 1.5 ounce injection for two years of protection.
• Trunk injection formulations can take hours to weeks to move throughout the tree. Most often trees are protected within a few days.
• Trunk injection is widely considered to be the most effective and consistent method available for preventing EAB from attacking a tree, or killing EAB in an infested tree. It can stop damage even if the tree is already under attack without harming the surrounding environment.
• Researchers at Michigan State, Ohio State, Purdue, the University of Illinois, and University of Wisconsin have concluded that Arborjet’s trunk-injected systemic insecticides are the most effective treatment options, providing very effective control of EAB for two years, with a single application, even under heavy infestation pressure.

*supplied by Arbortjet, makers of Tree-Age used by Kinnucan