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Tanacetum cinerariifolium

Keywords Biosynthesis Chrysanthemum cinerariaefolium Natural pyrethrins Tanacetum cinerariifolium... [Pg.73]

The pyrethrins are valuable insecticidal components of pyrethrum flowers, Chrysanthemum cinerariaefolium (= Tanacetum cinerariifolium) (Compositae/Asteraceae). The flowers are harvested just before they are fully expanded, and usually processed to an extract. Pyrethrum cultivation is conducted in East Africa, especially Kenya, and more recently in Ecuador and Australia. The natural pyrethrins are used as a constituent of insect sprays for household use and as post-harvest insecticides, having a rapid action on the nervous system of insects, whilst being biodegradable and non-toxic to mammals, though they are toxic to fish and amphibians. This biodegradation, initiated by air and light, means few insects develop resistance to the pyrethrins, but it does limit the lifetime of the insecticide under normal conditions to just a few hours. [Pg.188]

The pyrethrum daisies Chrysanthemum (=Tanacetum) cinerariifolium and C. cocci neum contain several compounds that kill insect pests on contact. You can purchase this insecticide in several forms The dried flqwer heads are called pyrethtum, while the extmeted active ingredients are called pyrethrin. (Pyrethroids are synthetic versions of the insecticide that are even more toxic to insects.)... [Pg.480]

Compositae plant that grows on rocky ground in Europe, Australia, Japan and North America. Principal allergen is pyrethrosin Synonyms Tanacetum cinerariifolium... [Pg.1204]

Kalmia latifolia, Leucothoe grayana, L. spp., Rhododendron spp. (Ericaceae) in honey from Rhododendron-feeding bees Tanacetum (Chrysanthemum) cinerariifolium (pyrethrum) (Asteraceae) Leopold Ruzicka (Croatia/Switzerland, Nobel Prize, 1939, Chemistry, polymethylenes terpenes) Tanacetum (Chrysanthemum) cinerariifolium (pyrethrum) (Asteraceae)... [Pg.140]

The Dalmatian insect powder, as its name imphes, was prepared from the dried, crushed blooms of the Dalmatian insect-flower (Tanacetum cinerarUfoli-um, syn. Chrysanthemum cinerariifolium, Pyrethrum cinerariifolium) (Fig. 8.23). [Pg.704]

See other pages where Tanacetum cinerariifolium is mentioned: [Pg.73]    [Pg.508]    [Pg.25]    [Pg.531]    [Pg.18]    [Pg.73]    [Pg.508]    [Pg.25]    [Pg.531]    [Pg.18]    [Pg.789]    [Pg.530]    [Pg.954]   
See also in sourсe #XX -- [ Pg.3 , Pg.73 , Pg.114 ]

See also in sourсe #XX -- [ Pg.188 ]

See also in sourсe #XX -- [ Pg.704 ]



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