I have a 4 year old Willow Hybrid that is dying. Last fall two trees were infected with Willow Scale. Treated with BioAdvanced 12 Month Tree and Shrub Protect & Feed Concentrate. In March they both seemed to be bouncing back with new healthy growth. Then 2 weeks ago one of the trees started to get brown leaves. I don't see anything obvious but would like to try and save this tree. Any advise or a direction I can follow to diagnose and treat before it's too late would be greatly appreciated. Thank you in advance.
