Catnip Lotion Matches Deet in Uganda Trials
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- Scofield's research team, working between Uganda and Wales, found that a 6% catnip oil lotion matched 15% Deet in field trials in eastern Uganda, while a 2% concentration was only marginally less effective
- Dr Simon Scofield of Cardiff University, a senior lecturer, said Deet is "out of the price bracket" for rural Ugandan subsistence farmers and designed the project to enable local production
- The repellent uses nepetalactone from catnip (Nepeta cataria) — the same compound that triggers feline euphoria — which has known insect-repelling properties not previously commercialized
- The project aims to build a community enterprise in Uganda to produce and sell the lotion, creating a self-sustaining income cycle; the product is currently distributed free via grant funding
- Malaria infects roughly 282 million people a year and killed 610,000 in 2024, mostly young children in African countries, with concerns growing about resistance to both insecticides and frontline drugs
- Swai Kyeba of the Ifakara Health Institute, an independent commentator, warned that topical repellents face low compliance due to frequent reapplication and urged further research on current repellent use before scaling up production
Why it matters: For rural Ugandan subsistence farmers who can't afford commercial repellents, a locally producible catnip lotion matching Deet's effectiveness at a fraction of the cost could become a new tool against malaria, which killed 610,000 people in 2024. But an independent expert's compliance caveat means it would supplement — not replace — existing vector-control measures like insecticide-treated nets.
