Pyrethrum is an insecticide derived from a plant extract of the species of the genus Chrysanthemum (Daisy), native to southwestern Asia and Africa, whose aromatic flower heads, when powdered, constitute the active ingredient Pyrethrin. The main active ingredients in Pyrethrin is a mixture of four compounds: Pyrethrin I and II and Cinerin II and I.
Pyrethrum has shown to have low level of toxicity to mammals. This family of insecticides is EPA registered for use in many household products and livestock treatment as well for treating unwanted pests in edible plants and fruits. Used properly and at the concentrations stated in the label instructions, Pyrethrum should not be harmful.
Pyrethrum insecticides have been used in agriculture and equine applications for over thirty years, with no known harmful effects.