What are Botanical Pesticides? July 11, 2016 Definition Botanical Pesticides or natural insecticides are organic and natural pesticides that are derived from plants and minerals, that have naturally occurring defensive properties. These types of pesticides have become more popular since they do not release toxins as they decompose. Also, they have proven to be more useful than conventional insecticides as insects become more resistant to synthetic pesticides. Want to Know More? Plants use self-created pesticides as a form of defense against diseases, herbivores, and insects….