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   Cenchrus clandestinus (grass) français     
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         General Impact

    Under certain conditions C. clandestinus can accumulate high levels of soluble oxalates and nitrates that are toxic when eaten by livestock (CDFA, 2003). Can invade areas of turf, such as golf courses and lawns (Haubensak & Smyth, 1999). Forms mats, which inhibit regeneration by smothering seedlings. Also produces allelopathic chemicals that kill other plant species in its vicinity (Sanchez & Davis, 1969 in PIER, 2003). Invades agricultural areas and roadsides, and is able to climb over and smother shrubs and young trees (South Coast Weeds, 2003). In Peru, C. clandestinus has invaded ancient Inca ruins, causing destruction through its roots growing in crevices and cracking the stones (Environment and Conservation, 1999).



         Location Specific Impacts:
    Australia English 
    Agricultural: A weed of pastures, cereals, citrus, sugarcane and vineyards.
    Colombia English 
    Agricultural: A weed of potatoes, wheat, corn, fruit crops, barley and irrigated crops.
    Costa Rica English 
    Agricultural: A weed of row crops and tea.
    Ecuador English 
    Agricultural: A weed of pastures.
    Gibraltar English 
    Competition: Cenchrus clandestinus is an aggressive species forming dense mats, smothering and excluding indigenous flora.
    India English 
    Agricultural: A principal weed of tea.
    Kenya English 
    Agricultural: A principal weed of pyrethrum and a weed of pastures, forests, tea and sisal.
    Machu Picchu (Peru) English 
    Other: Cenchrus clandestinus has caused damage to ancient Inca ruins, as its roots grow into crevices and crack the stones.
    Taiwan English 
    Agricultural: A weed of pastures.
    Uganda English 
    Agricultural: A weed of tea.
    California (United States (USA)) English 
    Agricultural: A weed of irrigated crops.
    Hawaii (United States (USA)) English 
    Agricultural: A weed of vegetables, papayas and bananas.



ISSG Landcare Research NBII IUCN University of Auckland