纳扎索(1997)报告说：丝路蓟(Cirsium arvense)经由直接竞争取代自然植群而威胁天然植被，降低物种多样性，改变一些栖地的结构和组成。未受干扰的”草原的物种多样性，与丝路蓟的相对出现频率成反比。它对农民和农场业主的经济产生威胁。此植物的侵袭会竞夺水份，营养物和矿物质，使农作物产量减少，也会干扰收获。在加拿大，丝路蓟(Cirsium arvense)的主要影响是在农地，自然田野已经或正在从干扰中恢复。在美国，它是豆蚜虫，茎螟的宿主，这些昆虫会影响玉米和西红柿以及草皮，也是网蠕虫的宿主，此昆虫会损害玉米。在保加利亚，丝路蓟是黄瓜花叶病毒的宿主。此病毒除了会减少饲料和牧草生产以外，也可能会割伤草食动物，导致小感染。Zouhar(2001)报告说：在美国中西部，大平原各州和太平洋西北地区的许多国家公园和TNC(大自然保护协会)的保护区，它已被确定是一个管理上很麻烦的问题。丝路蓟(Cirsium arvense)的侵袭可能会助长消灭濒危或特有植物，如怀俄明州的科罗拉多蝴蝶植物。
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.
United States (USA)
农业: Thunhorst and Swearingen (1997) report that Cirsium arvense has long been recognized as a major agricultural pest. Nuzzo (2001) states that infestations reduce crop yield through competition for water, nutrients and minerals, and through interference with harvest. It is a host for bean aphid and stalk borer, insects that affect corn and tomatoes, and for sod-web worm (Crampus sp.), which damages corn.
竞争: It threatens natural communities by directly competing with and displacing native vegetation, decreasing species diversity, and changing the structure and composition of some habitats (Nuzzo, 1997).
经济 /民生: Zouhar (2001) states that it is considered one of the most tenacious and economically important agricultural weeds. It presents an economic threat to farmers and ranchers (Nuzzo, 1997), costing tens of millions of dollars in direct crop losses annually and additional millions for control (Thunhorst and Swearingen, 1997).
Wyoming (United States (USA))
其它: Infestations of Cirsium arvense may contribute to the elimination of endangered and/or endemic plant species such as the Colorado butterfly plant in Wyoming (Zouhar, 2001).