EAB Management Options for Homeowners and Professionals

The UW-Madison Emerald Ash Borer in Wisconsin webpage offers many links that will help tree owners and tree care providers make the appropriate decisions in regards to managing ash trees.

Stated in the Homeowner Guide to EAB Insecticides:

A variety of insecticide products are available to homeowners for control of emerald ash borer (EAB). Based on current research however, treatments are suggested only for ash trees located within 10 to 12 miles of a confirmed EAB site, or for trees located within a quarantined area. Insecticide treatments are not necessary for ash trees located outside of these areas. Even within the 10 to 12 mile radius, not all trees should be treated. Due to the expense of yearly insecticide treatments, one should consider the value of a particular ash tree in relation to insecticide treatment costs before making any treatments. In addition, consider the health of each tree before treating. Research suggests that insecticide treatments are significantly more effective on EAB-infested ash trees with less than 40% canopy dieback. Insecticide treatments are not suggested for trees with greater than 40% canopy dieback. Trees with greater than 40% canopy dieback should be removed and destroyed in accordance with established guidelines.

The timing of application depends on the type of product you purchase.  Some products are best applied in the spring while others can be applied in the summer.  Please note, with our current abnormally dry conditions, uptake of any systemic product may be less than optimal.  Consider watering your trees 1-inch of water per week for several weeks before applying.  As always, read labels carefully before handling any pesticide.

More information:

• UW-Extension Fact Sheet: Homeowner Guide to EAB Insecticides
• UW-Extension Fact Sheet: Professional Guide to EAB Insecticides