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pyrethrum    
n. 除虫菊

除虫菊

pyrethrum
n 1: made of dried flower heads of pyrethrum plants
2: white-flowered pyrethrum of Balkan area whose pinnate leaves
are white and silky-hairy below; source of an insecticide;
sometimes placed in genus Chrysanthemum [synonym: {pyrethrum},
{Dalmatian pyrethrum}, {Dalmatia pyrethrum}, {Tanacetum
cinerariifolium}, {Chrysanthemum cinerariifolium}]
3: 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 [synonym: {painted daisy}, {pyrethrum}, {Tanacetum
coccineum}, {Chrysanthemum coccineum}]
4: used in former classifications for plants later placed in
genus Chrysanthemum and now often included in genus Tanacetum
[synonym: {Pyrethrum}, {genus Pyrethrum}]


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  • Pyrethrum - Wikipedia
    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: Overview, Uses, Side Effects, Precautions . . . - WebMD
    Learn more about Pyrethrum uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Pyrethrum
  • Pyrethrum Tanacetum Plant Growing Care Guide for Gardeners
    In this Gardener's HQ guide, we'll explore cultivating Pyrethrum Tanacetum plants in your garden, indoor spaces, and other settings Plant Characteristics: Pyrethrum have daisy-like blooms that help to attract beneficial insects, making them a valuable addition to an eco-friendly wildflower garden
  • Pyrethrum | Definition, Description, Insecticide, Species | Britannica
    pyrethrum, any of certain plant species of the aster family (Asteraceae) whose aromatic flower heads, when powdered, constitute the active ingredient in the insecticide called pyrethrin
  • Growing Guide for Pyrethrum – Chrysanthemum - Backyard Gardener
    From the Greek pyr, fire, probably with reference to fever, since the plant was used medicinally to assuage fever (Compositae) These hardy plants are admirable for a sunny border and last well as cut flowers Long known as pyrethrum they are botanically classified under Chrysanthemum
  • Cultivating Pyrethrum: The Natural Insect Repellent - LoveToKnow
    Pyrethrum refers to several flowers in the genus Chrysanthemum The name is most commonly used to refer to Chrysanthemum cinerariifolium and Chrysanthemum coccineum Pyrethrum are a natural insect repellant and are grown in vegetable gardens and landscapes to keep insects away from other plants
  • Pyrethrins and Pyrethroids | Public Health Statement | ATSDR
    Pyrethrum is a naturally occurring mixture of chemicals found in certain chrysanthemum flowers Pyrethrum was first recognized as having insecticidal properties around 1800 in Asia and was used to kill ticks and various insects such as fleas and mosquitos
  • PYRETHRUM Definition Meaning - Merriam-Webster
    The meaning of PYRETHRUM is any of several chrysanthemums with finely divided often aromatic leaves including ornamentals as well as important sources of insecticides
  • Pyrethrin vs. Pyrethrum: Unraveling the Insecticidal Duo
    Pyrethrum refers to the naturally occurring extract obtained from dried pyrethrum flowers (Chrysanthemum cinerariifolium or Tanacetum cinerariifolium) This extract is a complex mixture of several insecticidal compounds, including pyrethrins I and II, cinerins I and II, and jasmolins I and II
  • Pyrethrum | Horizon Sopyrwa
    Pyrethrum is a natural insecticide derived from the dried flowers of the chrysanthemum plant Its rapid-acting, low-toxicity properties, along with a lack of insect resistance, make it a globally sought-after product





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