英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

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}]


请选择你想看的字典辞典：
单词字典翻译
pyrethrum查看　pyrethrum　在百度字典中的解释百度英翻中〔查看〕
pyrethrum查看　pyrethrum　在Google字典中的解释Google英翻中〔查看〕
pyrethrum查看　pyrethrum　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • 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 | Definition, Description, Insecticide, Species | Britannica
    Pyrethrum, any of certain plant species of the aster family whose powdered flower heads constitute the active ingredient in the insecticide pyrethrin Two species are commerically important sources for the naturally derived insecticide, though synthetic compounds have been developed
  • Pyrethrum - Uses, Side Effects, and More - WebMD
    Learn more about Pyrethrum uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Pyrethrum
  • Pyrethrum - an overview | ScienceDirect Topics
    Pyrethrum is actually a natural mixture of six chemicals called pyrethrins (ATSDR, 2003a) You can make that same insecticide today by drying chrysanthemum flowers, extracting, and crushing the seed cases and rinsing them thoroughly in a small quantity of water
  • Pyrethrum Tanacetum Plant Growing Care Guide for Gardeners
    At a Glance: Pyrethrum Tanacetum Plant Characteristics: Pyrethrum have daisy-like blooms that help to attract beneficial insects, making them a valuable addition to an eco-friendly wildflower garden
  • 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
  • Pyrethrum: the natural insecticide - botanicalresources. com. au
    Pyrethrum is a highly effective insecticide which has been used for centuries against all manner of insect pests Now the centre of a high tech agricultural industry in the Australian island state of Tasmania, pyrethrum is exported to the world for use in a wide range of insecticidal preparations
  • Pyrethrum | C43H56O8 | CID 71310221 - PubChem
    Pyrethrum | C43H56O8 | CID 71310221 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety hazards toxicity information, supplier lists, and more
  • 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
  • (PDF) Pyrethrum an Organic and Natural Pesticide - ResearchGate
    Pyrethrum (Tanacetum cineraiifolium) is a perennial plant in the family of Asteraceae which is cultivated for the production of six closely related esters called pyrethrins, which possess





中文字典-英文字典  2005-2009