The Simple Eucalyptus Trick That Helps Repel Household Pests

Two amber glass bottles with a dropper on a wooden plate eucalyptus leaves and cloth around them — Credit:
Anastasiia Krivenok / Getty Images

Dealing with pests from time to time is part of everyday life, but that does not make it any less frustrating. While many people turn to harsh chemicals for quick results, starting with natural remedies is often a safer and more practical approach—especially in the early stages of a problem. If the issue escalates into an infestation, however, it is best to call a professional.

One natural option is eucalyptus, which can help repel pests in your home. We spoke with pest management expert Jim McHale to explain how eucalyptus works, the most effective way to use it, and the common mistakes to avoid.

Jim McHale, president of JP McHale Pest Management

How to Use Eucalyptus Oil for Pest Control

If you notice a pest problem in your home, start by sealing and caulking any potential entry points.

The most effective way to use eucalyptus for pest control is to apply it as an oil-based solution around your home. "A 5% solution, applied around avenues of entry, vulnerable pathways, and openings, may deter rodents and crawling pests," McHale says.

Eucalyptus oil emits a strong odor that signals a threat to pests, as it's not a scent that's typically found in their natural habitat. For the best results, reapply the solution daily, as consistent use is critical to effectively keeping pests out of your home.

When to Call a Professional

Other methods—such as soaking cotton balls in eucalyptus oil and placing them near harborage sites—are rarely effective, McHale says. The scent doesn't last long enough, and once it fades, pests may use the cotton as nesting material. If pests are already present in the area, the weakened odor is not strong enough to deter them.

If the problem escalates and natural remedies are no longer effective, it's time to call a professional. "Exclusionary methods, live trapping, and strategic use of rodenticide can be more effective and efficient," McHale warns.

Common Mistakes to Avoid

When using eucalyptus oil for pest control, keep pets and young children away from treated areas. "It is toxic to them," McHale warns. "The oil needs to be mixed with water; pure eucalyptus can burn skin and cause health issues in some animals."

McHale adds that Integrated Pest Management (IPM) requires a holistic approach. A combination of methods—such as eliminating harborage, sealing entry points, using natural determents, and removing food sources—creates a more effective, long-term pest control strategy. Relying on a single method is rarely enough.

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Sources

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