TL;DR: Oil of lemon eucalyptus (OLE) is a plant-derived active ingredient used in EPA-registered mosquito and tick repellents. It contains PMD, a compound responsible for its repellent properties, but OLE is not the same as lemon eucalyptus essential oil.
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Oil of lemon eucalyptus is a plant-derived active ingredient used in EPA-registered mosquito and insect repellent formulations
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PMD (p-menthane-3,8-diol) is an important repellent compound associated with OLE.
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Oil of lemon eucalyptus and lemon eucalyptus essential oil are not the same thing – and should not be treated as interchangeable
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Protection time depends on the specific formulation, concentration, and target pest – always follow the product label
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Murphy's Naturals oil of lemon eucalyptus mosquito repellent spray uses 30% OLE and provides up to 6 hours of mosquito protection, along with labeled protection against multiple tick species.
What Is Oil of Lemon Eucalyptus (OLE)?
If you've spent time looking for a plant-based mosquito repellent, you've probably encountered several similar-sounding terms: oil of lemon eucalyptus, lemon eucalyptus oil, OLE, PMD. They aren't all the same thing – and the differences matter when you're choosing a repellent.
Oil of lemon eucalyptus comes from the lemon-scented eucalyptus tree, Eucalyptus citriodora (also known as Corymbia citriodora). The plant's oil is processed to create OLE, a plant-derived active ingredient used in mosquito and insect repellents.
OLE contains a compound called PMD that plays an important role in its repellent properties. But you don't need to know the chemistry to understand the key distinction: an oil of lemon eucalyptus insect repellent is a formulated repellent product – not simply a bottle of lemon eucalyptus oil or essential oil.
Understanding what OLE is – and what it isn't – makes it easier to choose and use an oil of lemon eucalyptus mosquito repellent correctly.
What Is Oil of Lemon Eucalyptus Used For?
Oil of Lemon Eucalyptus is primarily used as an active ingredient in personal insect repellents designed to help repel mosquitoes and, depending on the product, ticks.
You'll most commonly find it in an oil of lemon eucalyptus bug spray, pump spray or mist designed for application to exposed skin and clothing.
Different products may carry different pest and protection-time claims, so always check the label to see exactly what your OLE mosquito repellent is designed to repel.
What Is PMD (p-Menthane-3,8-diol)?
PMD, short for p-menthane-3,8-diol, is an important repellent compound associated with oil of lemon eucalyptus.
It's one of the reasons OLE works as an insect repellent, and you'll occasionally see terms like PMD mosquito repellent used when reading about OLE.
That's really the main connection you need to know: PMD helps give OLE its repellent properties.
Oil of Lemon Eucalyptus vs. Lemon Eucalyptus Essential Oil – What's the Difference?
Here's where the naming gets confusing.
Despite sounding almost identical, oil of lemon eucalyptus and lemon eucalyptus oil (or lemon eucalyptus essential oil) are not the same ingredient.
Oil of lemon eucalyptus (OLE) used in registered repellents is a processed, plant-derived active ingredient containing PMD. Pure lemon eucalyptus essential oil is different and shouldn't be assumed to provide the same repellent protection.
The CDC specifically distinguishes OLE/PMD repellent products from unformulated or "pure" lemon eucalyptus essential oil and does not recommend the latter as an insect repellent because it has not undergone the same validated testing for safety and efficacy.
So if you're looking for a lemon eucalyptus oil bug repellent or mosquito repellent lemon eucalyptus oil product, check the active ingredient on the label rather than relying on the product name or scent alone.
How Does OLE Mosquito Repellent Work?
A mosquito repellent doesn't need to kill mosquitoes to do its job. Its role is to help discourage them from landing and biting.
In an oil of lemon eucalyptus mosquito repellent, OLE serves as the active repellent ingredient. PMD, a compound associated with OLE, plays an important role in that repellent effect.
As with any repellent, how well and how long it works depends on the finished formulation, correct application, concentration, and the pests listed on the product label.
What Does Oil of Lemon Eucalyptus Repel?
OLE is best known for mosquito and tick protection, but that doesn't mean every oil of lemon eucalyptus bug spray is designed to repel every insect.
Like any oil of lemon eucalyptus bug repellent, the specific insects covered depend on the finished formulation and product label.
Does Oil of Lemon Eucalyptus Repel Mosquitoes?
Yes. Oil of lemon eucalyptus mosquito repellent is used in EPA-registered products designed to help repel mosquitoes.
How long that protection lasts depends on the concentration, finished formulation, and directions on the individual product label.
Does Oil of Lemon Eucalyptus Repel Ticks?
Certain OLE formulations are also registered for tick protection.
An oil of lemon eucalyptus tick repellent may protect against one or more tick species, but the species covered and protection time vary by product.
So, does lemon eucalyptus repel ticks? Properly formulated and registered OLE repellents can. Check the label to see exactly which tick species the product is designed to repel and for how long.
What Are the Benefits of Oil of Lemon Eucalyptus Insect Repellent?
For people interested in plant-derived repellents, oil of lemon eucalyptus insect repellent offers several practical benefits. The exact performance still depends on the finished product, concentration, and label.
OLE Is a Plant-Derived Repellent Active Ingredient
OLE is derived from lemon eucalyptus and is used as the active ingredient in EPA-registered oil of lemon eucalyptus bug repellent products.
That distinction is important: plant-derived doesn't simply mean an essential-oil blend. OLE is used in finished repellent products that have been evaluated for safety and effectiveness when used according to their labels.
Oil of Lemon Eucalyptus Can Provide Hours of Mosquito Protection
OLE can provide multi-hour mosquito protection when used in properly formulated repellent products.
There isn't one universal protection time for every oil of lemon eucalyptus spray. How long it lasts depends on the concentration and finished formulation, which is why protection times should always be taken from the individual product label.
OLE Repellents Can Protect Against Mosquitoes + Ticks
Certain OLE-based repellents are registered for both mosquito and tick protection, allowing one personal repellent to address both types of pests.
The exact tick species covered and protection times vary by product, so check the label rather than assuming every OLE formula provides the same coverage.
How Effective Is Oil of Lemon Eucalyptus Against Mosquitoes?
Oil of lemon eucalyptus is an established active ingredient used in EPA-registered skin-applied insect repellents. EPA registration means the finished product has been evaluated for safety and effectiveness when used according to its label.
But there isn't one universal level or duration of protection for every OLE product. Concentration, formulation, correct application, and the target pest all matter.
EPA's repellent finder reflects this by allowing consumers to compare registered products by active ingredient, insect, and protection time rather than treating every product made with the same active ingredient as identical.
How Long Does Oil of Lemon Eucalyptus Last?
The simple answer: it depends on the product.
There isn't one universal protection time for every oil of lemon eucalyptus spray. Duration can vary based on the concentration, formulation, target pest, and the specific claims of the finished product.
Mosquito and tick protection times can also differ within the same repellent, so always check the product label for the stated protection window and reapplication directions.
How to Apply Oil of Lemon Eucalyptus Bug Spray
The best way to use any oil of lemon eucalyptus bug spray is straightforward: follow the product label. More isn't automatically better, and application directions can vary by formulation.
Specifically for the Murphy's Naturals Lemon Eucalyptus Oil Mosquito and Tick Repellent apply to exposed skin and clothing. For best results, spread evenly with hand to moisten all exposed skin. Do not spray directly on face. To apply to face, dispense on palm of hand and spread on face and neck. Reapply once as needed. Do not apply more than twice per day.
Apply Oil of Lemon Eucalyptus Repellent to Exposed Skin + Clothing as Directed
Apply repellent only where the product label permits. Some OLE repellents are labeled for application to exposed skin and clothing, while directions can vary by product.
How to Apply Oil of Lemon Eucalyptus Repellent to Your Face
Don't spray repellent directly onto your face.
Apply it to your hands first, then carefully spread it over exposed facial skin while avoiding your eyes and mouth. When applying repellent to a child, CDC similarly advises adults to spray it onto their own hands first and then apply it to the child's face.
How to Use OLE Repellent With Sunscreen
When using sunscreen and insect repellent together, apply sunscreen first. Allow it to absorb, then apply repellent according to the product label.
When to Reapply Oil of Lemon Eucalyptus Repellent
Reapply only as directed on the specific product label.
A product’s mosquito protection time should not be assumed to match its tick protection time—or the protection time of another OLE formula.
After returning indoors, wash treated skin with soap and water.
Is Oil of Lemon Eucalyptus Safe to Use?
Safety guidance applies to the finished repellent product, so the most important step is to follow the directions and precautions on the specific product label.
EPA-registered skin-applied repellents are evaluated for human safety and effectiveness when used according to their label directions.
A few basic guidelines:
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Read and follow the product label.
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Avoid eyes, mouth, cuts and irritated skin.
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Don't use more than directed.
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Wash treated skin after returning indoors.
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Follow any age or location-specific restrictions on the product.
What Does the CDC Say About Oil of Lemon Eucalyptus?
The CDC includes oil of lemon eucalyptus (OLE) and PMD among the repellent active ingredients in its mosquito and insect repellent guidance.
CDC also distinguishes formulated OLE/PMD repellents from unformulated lemon eucalyptus essential oil. In other words, lemon eucalyptus oil or essential oil should not automatically be treated as equivalent to an OLE repellent product.
How Does OLE Compare With Other Repellent Ingredients?
OLE is one of several active ingredients used in registered skin-applied insect repellents. Others include DEET, picaridin, PMD and IR3535.
One of OLE's clearest distinctions is its source: oil of lemon eucalyptus is plant-derived, while ingredients such as DEET and picaridin are synthetic.
Beyond that, protection time, pests covered, concentration and application directions depend on the finished product. That's why it's more useful to compare specific repellent labels than to assume one active ingredient will always perform the same way across every formulation.
For a closer look at the differences between these active ingredients, read our guide to DEET vs. picaridin vs. oil of lemon eucalyptus.
Where Does Murphy’s Naturals OLE Come From?
Murphy's Naturals partners with Citrefine®, the family-run company behind Citriodiol®, to source the oil of lemon eucalyptus used in our repellents. OLE has been a core part of Murphy's approach to plant-based mosquito protection for years.
Citriodiol® is produced from Eucalyptus citriodora. The production process uses steam distillation and a closed-loop recycled-water system designed to minimize waste.
For us, how an ingredient is sourced matters alongside how well it performs. Our OLE gives us a plant-derived repellent active ingredient with proven outdoor utility, sourced with the outdoors it's meant to help you enjoy in mind.
Murphy’s Naturals Oil of Lemon Eucalyptus Repellents
Murphy's offers OLE protection in two formats, both made with 30% oil of lemon eucalyptus as the active ingredient. The difference comes down to how you prefer to apply it.
Lemon Eucalyptus Oil Mosquito + Tick Repellent Spray
Shop Lemon Eucalyptus Oil Mosquito + Tick Repellent Spray →
Murphy's Naturals Lemon Eucalyptus Oil Mosquito + Tick Repellent Spray keeps the formula simple: 30% oil of lemon eucalyptus, water and corn ethanol. It provides:
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Up to 6 hours of mosquito protection
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Up to 4 hours against deer ticks
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More than 8 hours against lone star and brown dog ticks
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Application to exposed skin and outdoor gear
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No dyes or added fragrance
The formula goes on with a light, non-greasy feel and carries the naturally fresh scent of lemon eucalyptus – without added fragrance.
Available in 2 oz and 4 oz sizes.
Lemon Eucalyptus Oil Mosquito + Tick Repellent Mist
Shop Lemon Eucalyptus Oil Mosquito + Tick Repellent Mist →
Murphy's Naturals Lemon Eucalyptus Oil Mosquito + Tick Repellent Mist uses the same 30% OLE active ingredient in a continuous fine-mist format.
Its 360° application makes it easier to cover ankles, legs, shoulders and other hard-to-reach areas, while providing the same labeled protection times against mosquitoes and the listed tick species.
Like the Spray, the Mist offers a light feel and fresh lemon eucalyptus scent with no added fragrance.
Same plant-derived active. Two ways to apply it. Pick your format, get outside and let the bugs find somebody else's plans to interrupt.
Explore all Murphy’s Naturals mosquito repellents.
Frequently Asked Questions
What Is Oil of Lemon Eucalyptus?
Oil of lemon eucalyptus is a plant-derived active ingredient used in mosquito and insect repellents – commonly referred to as oil of lemon eucalyptus OLE or simply OLE. It comes from lemon eucalyptus and contains PMD, an important compound associated with its repellent properties.
Is Oil of Lemon Eucalyptus the Same as Lemon Eucalyptus Essential Oil?
No. Oil of lemon eucalyptus used in registered repellents is different from unformulated lemon eucalyptus oil or lemon eucalyptus essential oil. CDC specifically distinguishes formulated OLE/PMD repellents from pure lemon eucalyptus essential oil.
What Is Oil of Lemon Eucalyptus Used For?
Oil of lemon eucalyptus is primarily used as an active ingredient in personal insect repellents designed to repel mosquitoes and, depending on the formulation, ticks.
Does oil of lemon eucalyptus repel ticks?
Yes, certain registered OLE formulations are designed to repel ticks. The specific tick species covered and protection time vary by product, so check the label of the repellent you're using.
How long does oil of lemon eucalyptus last?
Protection time depends on the finished product, concentration and target pest. There isn't one universal protection time for every oil of lemon eucalyptus spray, so check the product label for its stated protection window and reapplication directions.
Can you put oil of lemon eucalyptus directly on your skin?
Use a finished repellent product according to its label rather than applying unformulated oil directly to your skin. Some oil of lemon eucalyptus bug spray formulations are designed for direct application to exposed skin.
Is oil of lemon eucalyptus as effective as DEET?
Both oil of lemon eucalyptus and DEET are active ingredients used in EPA-registered skin-applied repellents, but protection varies by concentration, formulation and individual product. Compare the labeled protection claims of specific repellents rather than assuming every OLE or DEET product performs identically.
What insects does oil of lemon eucalyptus repel?
OLE is commonly used in products registered for mosquito protection, and some formulations also carry tick claims. The exact insects covered vary by product, so check the label rather than assuming every OLE repellent protects against the same pests.
How effective is oil of lemon eucalyptus against mosquitoes?
Oil of lemon eucalyptus is an established active ingredient used in EPA-registered mosquito repellents. Its effectiveness depends on the concentration, finished formulation, correct application, and the product’s labeled protection time, so not every OLE repellent will perform exactly the same.
