The past few weeks I’ve had a few property managers and friends ask me about Emerald Ash Borer (EAB) treatments. Tree companies and landscape vendors are are coming to them and saying “You need to get it or their trees will die!” They are 100% accurate, but that isn’t the whole story.
Treatments have proven to be extremely effective in preventing trees from EAB infestations. It is generally a chemical injected into the tree’s vascular system and kills insects that try to make a home inside it. These treatments are expensive and must be done every year!
UPDATE 4/13/2010: I have been informed there is a new product on the market that can be effectively applied every two years. However, this does not change our philosophy on the long-term costs associated with treated ash trees for EAB.
Only treat trees that you REALLY want to keep: old ash at main entrances or trees that may have historical value (like at the state fairgrounds). In my opinion, there aren’t too many ash trees that are worthy of yearly treatments. Ash are not high-value trees or long-lived so you are generally better off using the money you would put into treatments and diversifying with other tree species and waiting for the existing trees to succumb to EAB which probably will not be for many years.
Here is our previous post about EAB that explains a little more in depth Quercus’ approach to EAB.
Have a wonderful day!
Brad