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   Cirsium arvense (草本植物) English 
生態 分佈 管理 影響 參考資料 聯繫

    此物種詳細資訊 Canada
    狀態: 狀態未指定
    出現紀錄: ???
    來源: Zouhar, 2001
    簡介: 意外引入
    Probably introduced to North America in the 1600s as a contaminant of crop seed and/or ship's ballast.
    Canada thistle is listed as a noxious weed in 7 Canadian provinces.
    農業: Zouhar (2001) states that it is considered one of the most tenacious and economically important agricultural weeds. Nuzzo (2001) states that infestations reduce crop yield through competition for water, nutrients and minerals, and through interference with harvest. In Canada, the major impact is on agricultural land and in natural areas that have been disturbed or are undergoing restoration.
    最後修改 : 15/02/2004 4:11:04 p.m.

ISSG Landcare Research NBII IUCN University of Auckland