---
title: Why is my oak tree oozing black sap?
description: "This is most likely the result of an infestation of one of these pests: oak borer, longhorned beetle, or roundheaded borers. The best time to treat is May-July. [Read more](https://resources.ext.vt.edu/contentdetail?contentid=2215&contentname=Longhorn%20Beetles%20and%20Roundheaded%20Borers) about these pests on shade trees and how to treat…"
url: "https://www.henricomg.org/docs/why-is-my-oak-tree-oozing-black-sap/"
updated: "2021-08-20"
category: PESTS
---

# Why is my oak tree oozing black sap?

This is most likely the result of an infestation of one of these pests: oak borer, longhorned beetle, or roundheaded borers. The best time to treat is May-July. [Read more](https://resources.ext.vt.edu/contentdetail?contentid=2215&contentname=Longhorn%20Beetles%20and%20Roundheaded%20Borers) about these pests on shade trees and how to treat them.