Oak Sap Leak
I have a large oak tree leaking sap about a foot above the
ground. The sap turns into a white foam like appearance. I dug away some
of the bark in the area and covered the area with black prunning paint.
The sap continues to leak.
It will eventually stop but since it is still the growing season it
will probably take some time.
Anthony R. Brach, PhD
Missouri Botanical Garden
c/o Harvard University Herbaria
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Update: June 2012