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   Imperata cylindrica (graminée)  English     
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      Imperata cylindrica root (Photo: Carey Minteer, University of Georgia, Bugwood.org) - Click for full size   Imperata cylindrica flower (Photo: Mark Atwater, Weed Control Unlimited, Inc., Bugwood.org) - Click for full size   Plants of Imperata cylindrica, near Nhulunbuy in Arnhem Land, Northern Territory, Australia (Photo: Colin Wilson) - Click for full size   Imperata cylindrica leaf blade portion showing off-centre midrib and scabrous leaf margins (Photo: L. M. Marsh, Florida Department of Agriculture and Consumer Services, Bugwood.org) - Click for full size   Plants of Imperata cylindrica, near Nhulunbuy in Arnhem Land, Northern Territory, Australia (Photo: Colin Wilson) - Click for full size   General appearance of Imperata cylindrica, taken on Yap, Micronesia. (Photo: Jim Space, www.hear.org/pier) - Click for full size   Seed head of Imperata cylindrica, near Nhulunbuy in Arnhem Land, Northern Territory, Australia (Photo: Colin Wilson) - Click for full size
    Nom taxonomique: Imperata cylindrica (L.) Raeusch.
    Synonymes: Imperata arundinacea Cirillo, Lagurus cylindricus L.
    Noms communs: alang-alang, blady grass (English), Blutgras (German), carrizo, cogon grass (English), gi (Fijian), impérata cylindrique (French), japgrass (English), kunai, lalang, ngi (Fijian), paille de dys (French), paillotte (French), satintail (English), speargrass (English)
    Type d'organisme: graminée
    Imperata cylindrica est considérée comme l'une des 10 pires mauvaises herbes du monde et elle a été signalée par 73 pays comme un problème pour 35 types de cultures. C'est l'une des espèces colonisatrices les plus nuisibles des sols dégradés des forêts tropicales humides, et elle envahit souvent les zones de culture itinérantes abandonnées. En Asie du Sud-Est, les prairies d' I. cylindrica sont globalement considérées comme des terrains vagues improductifs et sa surface totale dans les tropiques (prairies naturelles incluses) est estimée à 2,000,000 km².
    Espèces semblables
    Imperata brasiliensis

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    Se rencontre dans:
    broussailles/savanes, côtes, forêts naturelles, plantations forestières, prairies, rudéral/perturbé, zones agricoles, zones humides, zones ripisylves, zones urbaines
    Utilisations
    Imperata cylindrica is used as thatch, short-term forage production, soil stabilisation and paper making (Watson & Dallwitz 1992, in Dozier et al. 1998). In surveys conducted in the coastal/derived savanna (Benin and Nigeria) and southern Guinea savanna (Ivory Coast) in Africa some farmers indicated that I. cylindrica was an important source of cheap roofing material, animal fodder and medicines. Silica bodies in the leaves contribute to its unpalatability to grazers (Coile & Shilling 1993, in Dozier et al. 1998). I. cylindrica was imported and distributed by the United States Department of Agriculture for use as a forage grass and for soil erosion control. In the United States, an ornamental variety of the grass is promoted for landscape use (Johnson & Shilling 2009). Although the ornamental varieties, known as 'Rubra,' 'Red Baron,' or 'Japanese Blood Grass' are not aggressive, plants grown from callus tissue can revert to the invasive form (Greenlee 1992, in Dozier et al. 1998).
    Cette espèce figure sur la liste de l’UICN des 100 espèces parmi les plus envahissantes au monde
    Révisé par: Dr. James Leary, Department of Natural Resources and Environmental Management, College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa
    Compilé par: Profile revision: National Biological Information Infrastructure (NBII) & IUCN/SSC Invasive Species Specialist Group (ISSG)
    Dernière mise à jour: Saturday, 21 August 2010


ISSG Landcare Research NBII IUCN University of Auckland