If your area has emerald ash borers, you need to know what to look for and how to protect your tree before it's too late. Two common emerald ash borer treatments used are soil treatments (drenches or injections) and trunk injections.
Here are the basics of both these treatments.
The emerald ash borers don't live in the soil, so treating the soil may sound like an odd choice. However, what happens is that the tree's roots suck up the treatment, allowing it to get inside the tree's tissues naturally.