Hey there, fellow tree lover! As a botanist who specializes in Emerald Ash Borer treatments for ash trees f. I wanted to share a recent experience with you. I received a late-night text from a client who was worried about woodpecker damage on his tree and possible EAB infestation. We did an Emerald Ash Borer treatment to the tree last July, but was wondering if he needed to get it re-injected this year.
After looking at the pictures he sent me, it seemed like the woodpecker damage could have been random pecking. However, it's important to note that EAB can stay in a pupa state for up to 18 months, during which time they are not susceptible to treatment. They can only be affected when they are in larva form feeding on the cambium layer or in their adult beetle state munching on leaves. So, if the treatment was done while the EAB were in either of these stages, re-injecting the tree this year might not be necessary.
It's also worth mentioning that we're not entirely sure why woodpeckers are targeting ash trees. It could be that they smell something within the tree, hear scratching, or are simply responding to other stimuli. If your tree is showing minimal damage and was treated within the last year, it's best to monitor it closely for any changes before deciding on a re-treatment. If you're still unsure, I recommend reaching out for a professional opinion. Keep on caring!