Editing Pyrethrum (section)

{{short description|Genus of plants and natural insecticide}}
{{more cn|date=May 2011}}

'''''Pyrethrum''''' was a genus of several Old World plants now classified in either ''[[Chrysanthemum]]'' or ''[[Tanacetum]]'' which are cultivated as ornamentals for their showy [[Pseudanthium|flower head]]s. '''Pyrethrum''' continues to be used as a common name for plants formerly included in the genus ''Pyrethrum''. Pyrethrum is also the name of a natural [[insecticide]] made from the dried flower heads of '''''[[Tanacetum cinerariifolium|Chrysanthemum cinerariifolium]]''''' and '''''[[Chrysanthemum coccineum]]'''''. The insecticidal compounds present in these species are [[pyrethrin]]s.