7 indoor plants that can keep insects away from home during monsoon
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Tulsi (Holy Basil)
Almost every Indian home already has one. Tulsi emits eugenol, a compound that repels mosquitoes and deters insects from settling nearby. A study published in IJCRT found that Ocimum sanctum leaf extracts showed good repellent and larvicidal activity against mosquitoes. Keep it near a window for best effect.
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Neem
Neem is one of India's oldest natural pest deterrents, and research confirms why. A peer reviewed study in the Journal of Insect Science (Oxford Academic) found neem oil showed up to 50% mosquito repellency in closed indoor environments. A small neem plant indoors, especially near entry points, adds a layer of natural protection.
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Lemongrass
Lemongrass contains citronellal, the same compound used in commercial mosquito repellents. A study published in the Granthaalayah research journal tested Cymbopogon citratus oil on human volunteers and found it kept mosquitoes away for up to three hours. Keep a pot near your balcony door or window during monsoon.
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Lavender
Lavender's linalool content interferes with a mosquito's ability to detect human hosts. A 2016 study published in Parasitology Research found Lavandula angustifolia essential oil repelled over 93% of Aedes aegypti mosquitoes indoors. The plant works best in a warm, well-lit room where its fragrance can diffuse naturally.
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Basil (Sabja or Sweet Basil)
Basil releases strong volatile compounds that insects actively avoid. A study in PubMed confirmed that Ocimum basilicum essential oil demonstrated broad anti-insect activity. Another study in ScienceDirect found basil leaf extract formulations achieved up to 95% potency against adult mosquitoes. A small pot on the kitchen counter works well.
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Peppermint
Peppermint's sharp menthol scent is something most insects want nothing to do with. A comprehensive review published in IJFMR covering aromatic plant efficacy against mosquitoes listed peppermint among the key plants whose volatile oils interfere with mosquito olfactory receptors. Crush a few leaves occasionally to release more of the scent indoors.
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Citronella
Citronella is probably the most globally recognised natural mosquito repellent. A ResearchGate study on citronella leaf based herbal repellents confirms that its essential oils disrupt mosquito olfactory receptors, making it harder for them to locate human hosts. Grow it in a wide pot near the main door or balcony.