Search results
Results from the WOW.Com Content Network
Pyrethrum was a genus of several Old World plants now classified in either Chrysanthemum or Tanacetum 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 .
It is called the Dalmatian chrysanthemum or Dalmatian pyrethrum, denoting its origin in that region of Europe (Dalmatia). It looks more like the common daisy than other pyrethrums do. Its flowers, typically white with yellow centers, grow from numerous fairly rigid stems. Plants have blue-green leaves and grow to 45 to 100 cm (18 to 39 in) in ...
The conspicuous daisy-like flowers are up to 20 millimetres (3 ⁄ 4 in) across, borne in lax corymbs. The outer, ray florets have white ligules and the inner, disc florets are yellow and tubular. It spreads rapidly by seed, and will cover a wide area after a few years. [3] [4] The plant produces achene fruit, and grows in stony slopes and ...
Tanacetum corymbosum. Tanacetum is a genus of about 160 species of flowering plants in the aster family, Asteraceae, native to many regions of the Northern Hemisphere. [5] They are known commonly as tansies.
Exposure to pyrethrum, the crude form of pyrethrin, [31] causes harmful health effects for mammals. Pyrethrum also has an allergenic effect that commercial pyrethroids don't have. [ 31 ] In mammals, toxic exposure to pyrethrum can lead to tongue and lip numbness, drooling , lethargy , muscle tremors , respiratory failure , vomiting , diarrhea ...
Persian powder is a green pesticide that has been used for centuries for the biological pest extermination of household insects, garden pests, and agricultural pests. [2] It may first have been exported from Persia to Ancient Rome.
The family is commonly known as the aster, daisy, composite, or sunflower family. Most species of Asteraceae are herbaceous plants, and may be annual, biennial, or perennial, but there are also shrubs, vines, and trees. The family has a widespread distribution, from subpolar to tropical regions, in a wide variety of habitats.
Anacyclus pyrethrum, the pellitory, Spanish chamomile, Mount Atlas daisy, bertram, or Akarkara, is a species of flowering plant in the daisy family Asteraceae. [4] It is native to Mediterranean Europe and parts of North Africa, but also naturalised in other parts of Europe, India and Pakistan. [ 5 ]