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Eucalyptus can work for repelling mosquitoes, but it all depends on the type of eucalyptus you’re using. It’s not as simple as planting an eucalyptus plant or even using essential oils.
What does have real scientific backing is something called oil of lemon eucalyptus (often shortened to OLE). This is a refined extract from the Corymbia citriodora tree, processed to concentrate its active compound, PMD (para-menthane-3,8-diol). OLE is recommended by the Centers for Disease Control and Prevention (CDC) and registered by the EPA for use as an insect repellent.
Testing by Consumer Reports found that 30% OLE products can provide protection comparable to low-to-moderate concentrations of DEET, typically lasting five to seven hours. That said, in high-density mosquito environments or areas with elevated disease risk, DEET or picaridin remain the more reliable choices.
While OLE-based products can be useful, they work best alongside other measures. Eliminating standing water, keeping vegetation trimmed, and using personal repellents consistently all help reduce your exposure. DIY approaches, including natural repellents, tend to offer short-term relief rather than lasting control.
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