I have several chili mesquite trees that are dripping sap on their trunks. They are young trees, 2-3 yrs. Too much sap! What is causing it? Thank you for helping.
Dripping sap might be caused by some kind of damage to the trunk, or borer insects; or it might be honeydew from one of several insects. These articles have more information: https://www.gardeningknowhow.com/ornamental/trees/tgen/what-is-tree-sap.htm
Here's more information on Chilean mequite: http://cals.arizona.edu/desertlegumeprogram/pdf/aridus19-2.pdf
If you still have a question, you can take some samples of your plants to the county extension service. This link will help you find the nearest office: