Burrowing into my Grapefruit Tree?
My first post here and I am in need of some professional advice.
I have a beautiful grapefruit tree in my backyard that we treat very well, over the last few weeks on one of the main limbs i have noticed what appears to be burrowing of some sort? Thought it might be a woodpecker but it is only on this one limb.
I am attaching an image, hopefully you all can tell me what is causing the issue so I can remedy it.
Thanks for your help!