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Sap from oak tree

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From: Hank Morris City: Sierra Madre, CA
Hi, we have a oak tree problem of sap. Is that a seasonal problem or is the tree dying? It is 100+ Years.
	Extension Message From: James Schmidt Extension Specialist, Home Horticulture/4-H Department of Crop Sciences schmidt1@illinois.edu
Here in the Midwest, aphids are typically the cause of sap dripping down on everything under the canopy. If there is a structural issue like a broken out branch or an acute crotch angle that has pulled apart the sap comes from those locations. Not being familiar with western oaks, I would suggest you contact a certified arborist to determine the cause and potential treatment program
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