Q.I Have a Healthy 3 Yr Old Nectarine Tree
It produces less than 1-3 nectarines a year that end up falling off each year. Recently, I noticed a clear golden sap oozing from most of the tree bark and when I touch it, it is crystallized. I don’t see any tree damage or wounds. Is this normal? The pictures of the peach canker is not what I am seeing. Thanks, Di

Certified GKH Gardening Expert
Since you stated it was a clear sap, this leads me to believe that peach borers may be the issue. Here is more information: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-borer.htm