The active ingredient in Rid is an insecticide called pyrethrum extract. Rid also contains an ingredient called piperonyl butoxide. This helps the pyrethrum extract work better because it prevents ...

The insecticidal compound pyrethrin is synthesized in Dalmatian pyrethrum (Tanacetum cinerariifolium (Trevis.) Sch.Bip.; Asteraceae), a plant species endemic to the eastern Mediterranean. Pyrethrin is ...