302:, contained in the seed cases, are extracted and sold in the form of an oleoresin. This is applied as a suspension in water or oil, or as a powder. Pyrethrins attack the nervous systems of all insects, and inhibit female mosquitoes from biting. When present in amounts less than those fatal to insects, they still appear to have an insect repellent effect. They are harmful to fish, but are far less toxic to mammals and birds than many synthetic insecticides and are not persistent, being biodegradable and also decompose easily on exposure to light. They are considered to be amongst the safest insecticides for use around food. Kenya produced 90% (over 6,000 tonnes) of the world's pyrethrum in 1998, called py for short. Production in Tanzania and Ecuador is also significant. Currently the world's major producer is Australia.
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224:, denoting its origin in that region of Europe (Dalmatia). It looks more like the common daisy than other pyrethrums do. Its flowers, typically white with yellow centers, grow from numerous fairly rigid stems. Plants have blue-green leaves and grow to 45 to 100 cm (18 to 39 in) in height.
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These plants can cause severe allergic reactions in some people. Prolonged contact with the dried flowers can cause allergic dermatitis, allergic rhinitis, and asthma.
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The plant is economically important as a natural source of an insecticide called "pyrethrum." The flowers are pulverized and the active components, called
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305:The plant is also used in companion planting. See
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216:by some biologists. It is called the
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264:adding citations to reliable sources
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307:Pyrethrum § Companion planting
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361:Plants of the World Online
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16:Species of flowering plant
856:Pyrethrum cinerariifolium
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756:Tanacetum cinerariifolium
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564:Tanacetum cinerariifolium
452:Tanacetum cinerariifolium
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385:Tanacetum cinerariifolium
355:Tanacetum cinerariifolium
319:Pyrethrum § Toxicity
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187:Tanacetum cinerariifolium
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41:Scientific classification
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25:Tanacetum cinerariifolium
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218:Dalmatian chrysanthemum
154:T. cinerariifolium
391:Plants For The Future
194:in the aster family,
387:- (Trevir.) Sch.Bip"
260:improve this section
222:Dalmatian pyrethrum
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163:Binomial name
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394:. Retrieved
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258:Please help
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1068:Anthemideae
611:iNaturalist
446:Wikispecies
396:16 February
276:August 2020
84:Angiosperms
1115:Categories
774:Plant List
367:18 January
339:References
333:Pyrethroid
317:See also:
300:pyrethrins
196:Asteraceae
130:Asteraceae
1121:Tanacetum
871:Q15600185
779:gcc-12483
577:242101198
551:242101198
247:does not
213:Tanacetum
201:Pyrethrum
148:Species:
141:Tanacetum
120:Asterales
54:Kingdom:
1007:Tropicos
950:11133502
865:Wikidata
813:Tropicos
740:PalDat:
642:10501187
629:252275-1
483:BioLib:
437:Q1158053
431:Wikidata
357:Sch.Bip"
327:See also
178:Sch.Bip.
126:Family:
110:Asterids
97:Eudicots
1038:1198925
1012:2716903
924:5395276
844:1085803
818:2716902
590:3118284
268:removed
253:sources
136:Genus:
116:Order:
58:Plantae
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970:NZOR:
963:519802
911:159482
885:232709
805:3090-4
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707:118510
681:202992
668:522332
655:117428
616:444224
603:104580
538:160405
512:482123
486:213408
476:232710
460:APDB:
313:Safety
1066:This
1033:WoRMS
945:IRMNG
937:30414
906:EUNIS
898:4QSK7
839:WoRMS
800:SANBI
763:PFI:
637:IRMNG
559:FoAO2
533:EUNIS
525:CHYCI
499:54N7B
463:97336
104:Clade
91:Clade
78:Clade
65:Clade
1072:stub
994:POWO
958:ITIS
932:GRIN
919:GBIF
880:APNI
787:POWO
766:5698
751:PfaF
702:NCBI
676:IUCN
663:ITIS
624:IPNI
598:GRIN
585:GBIF
520:EPPO
471:APNI
398:2019
369:2019
251:any
249:cite
1020:WFO
893:CoL
826:WFO
689:NBN
650:ISC
572:FoC
546:FNA
507:EoL
494:CoL
262:by
220:or
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