When a simple smell puts mosquitoes at the run
We know her for her freshness. They hate her viscerally. It is not an invention of grandmother or a folk remedy: Science has just confirmed that some natural smells act as a powerful repulsive against mosquitoes. Among them, a molecule found in candles, oils, soaps … and that you often already have in your bathroom.
Researchers from the University of California have observed that certain volatile organic compounds such as the geraniola substance present in particular in lemongrass, geraniums or rose oil, Disturb the olfactory receptors of mosquitoes AEDES AEGYPTIthe species responsible for the transmission of viruses such as dengue or chikungunya. Result: these insects, unable to properly analyze their environment, flee the smell Before even identifying a prey.
What scientific studies say about this natural repulsion
Geraniol is one of these compounds called “biopesticides”, validated by the Environmental Protection Agency (EPA) in the United States for their effectiveness in low concentration and their Low human toxicity. Unlike the chemical repellents type Deet, these substances do not kill the insect but strongly disorient.
Studies carried out between 2023 and 2025 have shown that mixtures containing between 10 and 20 % geraniol allowed a 75 % reduction in bites within a radius of 1 meter for 1 h 30 to 2 h. A performance that competes with certain conventional products, while being more respectful of the skin and the environment.
Even better: according to a publication of Journal of Medical Entomology (2024), when combined with a hydrophobic support (such as L-PDMS polymer), geraniol can maintain its action Until six o’clockeven outdoors.
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Geraniol, present in lemongrass oils and rose soaps, is one of the molecules that mosquitoes are most effectively fleeing according to science.
How to easily enjoy this natural mosquito repellent at home
Good news: you probably already have that smell in your home. Here’s how to use it wisely, without changing everything:
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Light a Candle with lemongrass or geranium oil On the terrace in the evening.
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Add a few drops of geraniol in an essential oil diffuser.
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Prefer soaps or shower gels with rose, geranium or lavender Before outings.
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Plant Geranium Rosat or lemongrass in a pot near the openings.
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Slide one Lingette or handkerchief soaked in Geraniol In your pockets or your picnic bag.
It’s discreet, it’s nice, and it works. Simply.
Validated efficiency: figures, duration, security
Natural repellents have long been perceived as less effective. However, the situation has changed. A French study of 2024, published in Parasite Epidemiology and Controlevaluated 20 repulsive substances : Geraniol was in the top 3 in terms of Immediate olfactory repulsion.
According to Crossed EPA and INRAE data:
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Geraniol acts in 3 to 5 minutes After broadcasting.
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Il Reduces the number of mosquito landings from 70 % to 90 %.
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Il does not present any danger to children or pets.
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on natural degradation Avoids any accumulation in aquatic environments.
And as it is present in many everyday products, there is no need to run in pharmacy to equip it.
© Shutterstock
Citronelle, geranium, pink: these sweet fragrances are actually powerful natural repellents against mosquitoes according to the latest entomological studies.
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