What is Horticultural Oil?
Oil based pesticides are an effective and ecologically friendly way to handle many garden insect pests and even some diseases. The majority of pest control oils are some type of mineral oil, a refined petroleum product. There are a few vegetable oils that are also effective pesticides, such as cottonseed oil and soybean oil. The oil is usually combined with some type of emulsifying agent so that it can be mixed with water and used as a spray.