A natural insecticide made from several insecticides called pyrethrins. Pyrethrum powder is produced from the flower heads of two species of chrysanthemum grown in the highlands of Africa, South America, and southeast Asia; low toxicity to people and pets.
Pyrethrum refers to several Old World plants of the genus Chrysanthemum (e.g., C. coccineum) which are cultivated as ornamentals for their showy flower heads. It is also the name of a natural insecticide made from the dried flower heads of C. cinerariifolium and C. coccineum. Some members of Chrysanthemum, including these two, are placed in another genus, Tanacetum, by some authorities.