One of the oldest pesticides known, pyrethrum is also the strongest insecticide allowed under National Organic Standards guidelines. Made from the dried flowers of a little white daisy now classified ...

THE insecticidal properties of the flowers of certain species of pyrethrum (Chrysanthemum) have been known for a long period, the very high toxicity of the active principles to insects and their ...

Pyrethrum is a naturally occurring mixture of chemicals found in certain chrysanthemum flowers. It was first recognised to have insecticidal properties around 1800AD in Asia and was used to kill ticks ...