Researchers collaborating between Wales and Uganda report that a mosquito-repellent lotion made from locally grown catnip works as well as DEET in laboratory and field tests. The project focuses on Nepeta cataria, a common mint-family herb. Scientists say the plant’s insect-repelling chemical, nepetalactone, is the active ingredient responsible for the repellent effect. Trials conducted in rural, malaria-endemic areas in Uganda measure mosquito avoidance and compare the catnip-based product with DEET, a widely used commercial repellent. The researchers report that the catnip lotion achieves similar effectiveness while being more affordable, which they describe as potentially important for communities that need preventive measures against mosquito-borne diseases such as malaria. The initiative is also presented as an economic opportunity: by using locally cultivated catnip and supporting a community enterprise model, it aims to create local jobs and a supply chain for the repellent rather than relying on imported chemical products. Both laboratory and field results are cited as showing strong performance for the homegrown lotion.