About my aspen tree oozing
My aspen tree is oozing a lot of dark brown liquid out of what appears to be bored holes. I don't know if it is sap or not. It looks very unhealthy and in wondering if I have to cut it down. I don't really want to but if it is a disease I will so it doesn't spread to my other trees. I'm uploading a photo so you can see it and hopefully have some advice for me. Thank you very much for your time, Matt.
Certified GKH Gardening Expert
You forgot to upload the photo but let me give this my best shot. This could be a poplar borer infestation. I would review the following article and if you agree, follow one of the recommended control options: