Neem oil is a brilliant, naturally derived pesticide among a host of other uses. It has a very distinctive smell - a cross between garlic and stale oil used for frying chicken. It takes some getting used to, especially if used for skin or scalp care. I make something I call a 'pesticide for people, plant, and pets', using Neem oil, essential oils of peppermint, lavender, and tea tree. To keep my plants pest free - I put about a pint of water into a spray bottle, add 15-20 drops of essential oilsSee full review