Burrowing insects like Emerald Ash Borers and Japanese Beetles can do severe damage to a variety of trees in our area. Now is the time to take preventative measures against these pests. The best treatment for burrowing insects is the chemical Imidacloprid. This can be applied to trees in several ways including a spray that is absorbed through the leaves, a systemic soil drench that is absorbed through the roots, or an injection into the trunk of the tree. Bayer and Fertilome both make easy to use products containing Imidacloprid. A treatment of Imidacloprid usually protects trees for a whole year.