Crossword clues for pyrethrum
pyrethrum
The Collaborative International Dictionary
Wiktionary
n. 1 Any of several daisy-like perennial African plants of the genus ''Tanacetum'', especially (taxlink Tanecetum cinerariifolium species noshow=1) 2 (context organic compound English) Any of several insecticides obtained from these plants; pyrethrin
WordNet
n. made of dried flower heads of pyrethrum plants
white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum [syn: Dalmatian pyrethrum, Dalmatia pyrethrum, Tanacetum cinerariifolium, Chrysanthemum cinerariifolium]
spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum [syn: painted daisy, Tanacetum coccineum, Chrysanthemum coccineum]
used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum [syn: genus Pyrethrum]
Wikipedia
Pyrethrum was a genus of several Old World plants now classified as Chrysanthemum or Tanacetum (e.g., C. coccineum) which are cultivated as ornamentals for their showy flower heads. 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 Chrysanthemum cinerariifolium and Chrysanthemum coccineum.
Usage examples of "pyrethrum".
If you use pyrethrum, spray at night, after the bees have quit for the day.
And remember that although pyrethrum is just powdered flowers, it can be toxic and should be washed off the pet once the operation is finished.
Chemical formulations of pyrethrum are more toxic than the natural ones, but they are still less toxic than lindane.
However, prolonged skin contact with pyrethrum can cause an allergic reaction in some people.
But at hortischool, Cape learned about neem spray, extracted from the chinaberry tree and the organic insecticide pyrethrum, which was made from dried daisies.
Sir William Roberts, of Manchester, has advised jujubes, made of gum arabic and pyrethrum, to be slowly masticated by persons who suffer from acid fermentation in the stomach, a copious flow of alkaline saliva being stimulated thereby in the mouth, which is repeatedly swallowed during the sucking of one or more of the jujubes, and which serves to neutralise the acid generated within the stomach.
Potentilla fruticosa, Pratia repens, Pyrethrum uliginosum, Rudbeckia californica, Saponaria ocymoides, Saxifraga mutata, S.
Potentilla fruticosa, Pratia repens, Pyrethrum uliginosum, Rudbeckia californica, R.
All supplies of pyrethrum leaves, flowers and powder, have to be handed over to the crown and used to the maximum effectiveness.
The men doing this work were dressed in tightly wrapped clothing that had been treated with pyrethrum to discourage fleas.
Mary Foster carried in her black-gloved hands a cluster of white pyrethrums, a favorite house-plant in Tuskamuck.
So distinct are its large flesh-coloured flowers that they are often taken at the first glance, when cut, for double pyrethrums or chrysanthemums, but, seen in connection with the plant, the form of foliage and climbing or twining habit of the bindweed soon enable the most casual observer of flowers to recognise its genus.