pyrethrum

英 [paɪˈriːθrəm]

美 [paɪˈriːθrəm]

n.  除虫菊(尤见于肯尼亚); 除虫菊杀虫剂

复数：pyrethrums　

牛津词典

noun

• 除虫菊（尤见于肯尼亚）
  a type of flower grown especially in Kenya
• 除虫菊杀虫剂
  a substance made from this flower and used for killing insects

英英释义

noun

• spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers
  Synonym:painted daisyTanacetum coccineumChrysanthemum coccineum
• white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below
  Synonym:Dalmatian pyrethrumDalmatia pyrethrumTanacetum cinerariifoliumChrysanthemum cinerariifolium
• made of dried flower heads of pyrethrum plants

双语例句

• Different effects were made by different treatments of concentration chemicals on physiological characteristics of pyrethrum leaves under high temperature stress.
  不同浓度药剂处理对高温胁迫下除虫菊叶片生理特性的影响不同。
• Screened on genotype, hormones and other conditions, we established an efficient regeneration pyrethrum system and studied on planta transformation of different conditions.
  通过对基因型、激素种类等条件的比较研究，建立了除虫菊的稳定高效再生体系，并对除虫菊原位转化的一些条件进行了初探。
• Thus, pyrethrum genotype was one of the most important factors for the regeneration.
  因此，除虫菊基因型是影响其叶片再生的重要因素之一。
• Studies on tissue culture and chromosome identification technology of pyrethrum cinerariae Folium trev.
  白花除虫菊组织培养研究。
• Comparative Studies on the Development of Pyrethrum Flower Head Before and After Introduction
  引种前后除虫菊花头生长发育的比较研究
• GC-MS Analysis of the Chemical Constituents of Natural Pyrethrum Extracted by Supercritical CO_2
  超临界CO2萃取天然除虫菊化学成分的GC-MS分析
• An insecticide derived from a plant, e.g. pyrethrum ( from Chrysanthemum flowers).
  3来源于植物的杀虫剂，例如除虫菊（来源于菊花）。
• Yotech export grade used for intermediate of Agrcultural pesticides, pyrethrum pesticide.
  永达出口标准农药杀虫剂菊酯中间体。
• [ Conclusion] The three months administration showed that natural pyrethrum has no immune toxicity in rats.
  结论天然除虫菊酯经口染毒3个月，未观察到明显的免疫毒性效应。
• Study on Microwave Extraction of Pyrethrum
  微波萃取除虫菊的研究