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<br /> <br /> <br /> <br /> <br /> <br />Emerald Ash Borer Management Plan <br />City of St. Anthony Village, MN <br />WSB Project No. 022315-000 Page 12 <br />days and larval densities were reduced by 99 percent compared to untreated trees”. <br />The insecticide is toxic to EAB larvae and adults upon ingestion. <br />Photo 4: Tag on Ash Tree Indicating <br />it has been Protected from EAB <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />Photo Credit: St. Anthony Village Facebook Post, <br />November 2022 <br /> <br /> The applied injection is systemic, so the tree takes up the insecticide in its <br />xylem tissues (water conducting system). <br /> The insecticide is injected where the root system and trunk interface is pulled <br />upward by the tree, spreads through the canopy in all the fine branches and <br />can be detected inside the tree tissues and leaves. <br /> The insecticide has a two-year efficacy period, with early research indicating <br />it might be possible to stretch treatments to every three years. <br />According to a handout created by the University of Minnesota and two other <br />universities detailing Frequently Asked Questions Regarding Potential Side Effects <br />of Systemic Insecticides Used to Control EAB , emamectin benzoate is “…derived <br />from a naturally occurring soil bacterium, has been registered for more than ten <br />years as a foliar spray to control pests in vegetable and cotton fields…and similar <br />products are used in veterinary medicine as wormers for dogs, horses and other <br />animals.” <br />The trunk injection can be performed on a tree 8-10 times (20-year time period) for <br />the price it would cost to: <br /> Remove the tree <br /> Grind the stump <br /> Replace the tree <br />At the end of the 20-year treatment cycle, a tree and all its ecosystem services <br />and benefits to the community have been preserved. <br /> The average stem diameter (DBH) of St. Anthony Village public trees <br />slated for protection is about 20” or about 80 years old, planted in 1943.