Q.mesquite tree sap
Can I put gauze on my tree? It won’t stop sapping after a year and its staining everything.
Certified GKH Gardening Expert
You can, but if there is something causing damage to the tree, such as a woodpecker or other pest, then it may not solve your problem. This is a tricky situation. You may have to just try and get the sap off of everything often and as best as you can. This article will help: https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-remove-tree-sap.htm
It is not a pest, it just never healed after it was trimmed.