Sap "misting" from Douglas Fir trees
We have been finding drops (almost a mist) of sticky , thick fluid on our cars, roof and decks over the past few weeks. Our property has many large Douglas Fir trees on it and we suspect the trees are the source of the fluid. We have seen this sticky stuff in the past few years but ignored it thinking it was a natural phenomenon. This year there is so much more sticky goo we are afraid the trees might be diseased. Does the Extension have experts that could investigate and diagnose our problem?
Lane County Oregon