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   Cirsium arvense (草本植物) English 
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    此物种详细信息 Canada
    状态: 状态未指定
    入侵: 未指定
    出现纪录: ???
    来源: Zouhar, 2001
    到达日期:
    简介: 意外引入
    此地点的物种说明:
    Probably introduced to North America in the 1600s as a contaminant of crop seed and/or ship's ballast.
    此地点的管理信息:
    地点批注:
    Canada thistle is listed as a noxious weed in 7 Canadian provinces.
    影响:
    农业: 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.
    最后修改 : 15/02/2004 4:11:04 p.m.


ISSG Landcare Research NBII IUCN University of Auckland