| 单词 | pyrethrum powder |
| 释义 | > as lemmaspyrethrum powder b. In full pyrethrum powder. A powdered insecticide containing pyrethrins, obtained from the flower heads of Tanacetum cinerariifolium and related plants. Cf. pyrethrin n. ΘΚΠ the world > physical sensation > use of drugs and poison > poison > [noun] > insecticide or pesticide acaricide1841 pyrethrum1876 benzene hexachloride1884 systemic1893 alphachloralose1894 pyrethrin1896 hexachlorethane1898 pesticide1933 bomb1944 bug juice1944 adulticide1945 miticide1946 chlordane1947 HCH1947 lindane1949 allethrin1950 Pybuthrin1951 isodrin1953 monosulfiram1953 mirex1962 naled1963 propoxur1964 methiocarb1966 carbofuran1968 aldicarb1969 pirimicarb1970 tickicide1971 methoprene1974 1868 Times 30 May 11/6 A well-known German traveller..describes the powder of the Pyrethrum roseum as a specific against all noxious insects.] 1876 G. B. Goode Classif. Coll. Illustr. Animal Resources U.S. 45 Protection from insects: Nets for beds and for face... Smudges, (such as pyrethrum powder.). 1888 Insect Life 1 145 Pyrethrum powder was freely used. 1902 Chambers's Jrnl. 22 Feb. 191/1 A house where a case of fever had occurred would be fumigated with burning pyrethrum, contiguous dwellings being treated in the same manner. 1927 F. Balfour-Browne Insects ii. 46 Cayenne pepper and even Pyrethrum Powder form a suitable pabulum for a few kinds. 1978 C. Jeffrey in V. H. Heywood Flowering Plants of World 268/3 Tanacetum cinerariifolium is the main commercial source of natural pyrethrum, used as an insecticide. 2001 Star–Herald (Scotsbluff, Nebraska) 9 June a4/2 One of organic farming's most widely used pesticides—pyrethrum—has been classified as a ‘likely human carcinogen’. < as lemmas |
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