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Mosquito repellent project wins ruchi shah a $25k scholarship her creation and development of an all-natural mosquito repellent science and engineering fair for that project focusing on . Natural insecticide - investigatory project it is the hot chillies that make the most effective repellent garlic's strong odor can also act as a repellent . Cacao leaves as insect repellant essay sample this study is made to find out the effectivity of cacao as an insect repellent it also aims to answer these .
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