一般影响
在纽西兰，此植物会阻塞水力电厂的入水口，并在深水的水库等水体形成密实的大型浮垫。在澳大利亚整个温带和亚热带地区，此植物有可能成为湖泊和缓慢流动溪流中的一个麻烦的杂草。在有利条件下，密集生长的卷蜈蚣草会阻挡光线穿透到水道，使原生植物无法生长，并影响水中的水生无脊椎动物族群。一旦扩散开来，将非常难以控制(大多数的沈水植物都很难控制)(Csurhes和爱德华兹, 1998)。詹姆斯等人(1999)报告说：卷蜈蚣草(Lagarosiphon major)会使水中pH值及二氧化碳含量升高，增加环境压力。卷蜈蚣草可能会经由竞争排挤掉Elodea属植物，因为它能在pH值及二氧化碳含量特别高的压力环境下，进行光合作用，持续生长，也比其它物种更能有效的利用碳酸氢盐。有迹象显示，卷蜈蚣草竞争成功的结果可能使它更能容忍，高pH值压力。 McGregor和古尔利(2002)说，卷蜈蚣草会取代原生植被；密集的侵袭会阻碍船只通行和限制休闲活动，如限制游泳和钓鱼；风暴会把杂草垫吹散，把大量腐烂植物吹到沙滩上，破坏沙滩的舒适价值。 拉特里(1994)报告说：卷蜈蚣草无论拓殖到任何地方都成功地竞逐掉原生植群。詹姆斯等人(1999)报告说：卷蜈蚣草正在取代E. nuttallii植群，其竞争力似乎比Elodea属植物优越，至少在一些栖息地的情况是如此。
地点特有的影响：New Zealand 
滋扰人类: Csurhes and Edwards (1998) state that, "In New Zealand, the plant has blocked intakes of hydro-electric systems and has formed dense floating mats in deep-water reservoirs and other water bodies."
降低本地生物多样性: "In New Zealand L. major not only produced roots faster, it also grew faster, both in length and biomass, than the native Myriophyllum triphyllum. This suggests that L. major has an early competitive advantage which may explain the dominance this species now has in the littoral zones of many New Zealand lakes" (Rattray 1994). Lake Dunstan (New Zealand)
滋扰人类: In Lake Dunstan, the adverse effects of lagarosiphon relate more to recreational and amenity values. These are nuisance rather than environmental effects, with plenty of scope for mitigation (Strikland et al 2000).
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