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Downtoearthdigs
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on June 29, 2017
Did the tree suffer an injury? Is the sap dripping from wounds in the tree?
Insects can leave a sticky residue called Honeydew.
These links have more information.
https://extension.psu.edu/pests/plant-diseases/all-fact-sheets/wetwood-or-slime-flux
https://www.gardeningknowhow.com/plant-problems/pests/insects/aphids-tree-disease.htm
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