pyrethrum

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Synonyms for pyrethrum

made of dried flower heads of pyrethrum plants

white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below

spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers

used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum

References in periodicals archive ?
After the extraction of pyrethrins, a total of 9 parts out of 10 parts are left in the powder form, which is known as pyrethrum marc.
Pyrethrums and Pyrethrum-related chemistries are safe to use, but are only somewhat effective.
Other recommendations include avoiding bananas, which are thought to attract the insects, and planting marigolds, which contain pyrethrums that repel insects.
Dead-head annuals like petunias, sweet peas, pansies, petunias, pelargoniums (geraniums) and French marigolds, and perennials such as delphiniums, shasta daisies and pyrethrums.
Reds and pinks can be found in pyrethrums, gerbera hybrids and the charming little English daisies, bellis perennis.