pyrethrum

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py·re·thrum

(pī-rē'thrŭm),
The root of Anacyclus pyrethrum (family Compositae), a shrub native to Morocco; has been used as a sialogogue; its flowers are a source of pyrethrins.
[G. pyrethron, feverfew, fr. pyr, fire, from the hot-tasting root]

pyrethrum

an INSECTICIDE prepared from the dried flowers of the chrysanthemum plant, the active ingredient being called pyrethrin.

pyrethrum

flowers of the plants Chrysanthemum cinerariaefolium (syn. Pyrethrum cinerariaefolium) and C. coccineum (syn. C. roseum). Called also Dalmatian or Persian insect powder. The insecticidal agents are the pyrethrins.
References in periodicals archive ?
A PYRETHRUM, now known as Tanacetum coccineum, the painted daisy, is a perennial.
Pyrethrums, the raw material for pyrethrins, is geographically concentrated in Kenya, Rwanda, Tanzania, Papua New Guinea, Italy, Brazil, Morocco, and Tunisia.
This week's online offer is six Pyrethrum Mixed for just PS2.