Can I spray vinegar on termites?

You can spray vinegar on termites and it may kill some termites on direct contact due to its acidity, but vinegar alone is not effective at eliminating a termite colony and is not recommended as a primary treatment for an active infestation because it does not reach the millions of members underground or inside wood. White vinegar contains acetic acid, typically 5 percent acidity, which can disrupt the outer coating of soft-bodied insects and dehydrate them, so spraying undiluted vinegar directly on visible termites in a small area may kill those individuals within minutes. Some DIY recipes mix vinegar with lemon juice or olive oil to increase acidity, but scientific studies show vinegar has very limited penetration into wood and soil and does not transfer back to the colony like non-repellent termiticides do, so it will not eliminate the queen or the nest. Subterranean termites live in large underground colonies and build mud tubes to reach wood, so killing a few foragers on the surface does not stop the colony from continuing to feed on structural wood. Additionally, vinegar can damage wood finishes, drywall paper, and plants if used excessively. For small, localized drywood termite activity on a piece of furniture that can be isolated, vinegar might be tried as a supplemental cleaning step, but for any structural infestation you need professional treatment including liquid barrier with fipronil or bait systems costing $1,000 to $3,000, plus fixing moisture issues and wood-to-soil contact. Using vinegar may give false security while damage continues unseen.