There are four EAB treatment options: soil injection, trunk injection, bark spray or canopy spray. Make summer treatment applications in the morning when temperatures are moderate. Used most often, soil and trunk injections get to the root of the problem by targeting the borers tunneling inside the tree. What treatment options are there for emerald ash borers? Emerald Ash Tree Borer Control Trunk Injection Ash Tree Treatments Kill 99% --100% Emerald Ash Borers Lanoha Nurseries now offering professional EAB treatment service Professional tree injection is the latest and best way to efficiently treat Emerald Ash Borer. Injections are made in the bottom 12'' of the tree, at intervals of 6'' apart. Emerald Ash Borer treatment options The most common EAB treatments are soil injections and trunk injections. The emerald ash borer (EAB) is the most destructive invasive forest insect ever to have invaded North America. Both deliver the product right into the tree's tissue, which is then evenly dispersed throughout the canopy. If soil is dry, water trees prior to treatment. Emerald Ash Borer treatment in the spring will prevent the adult beetles from feeding and laying eggs in the tree, whereas summer treatment will kill the larval stage of EAB feeding under the bark. This causes a disruption in the movement of nutrients and water within the ash tree, and eventually kills it. The Emerald Ash Borer is an invasive pest that destroys ash trees by boring into the bark and feeding on the transportation tissues of the tree. Trunk injection involves using a special injection tool which places and seals the insect control directly into the trunk where it is quickly taken up by the vascular system and distributed throughout the tree. Emerald Ash Tree Borer Control How to Measure Your Ash Tree To Estimate The Cost of Trunk Injection Treatments Estimate Cost of Injection Treatment Dose rate of formulation and cost are determined by your tree’s diameter at breast height (DBH). treatment methods.