These weevils, of course, are reported to reduce Eurasian milfoil in lakes by natural predation. You can subsribe to their newsletter, which contains case studies, research info, and more, using this link: www.enviroscienceinc.com/cgi-bin/displayContent.pl?type=section&id=549
I think an unbiased article on the process is in order. Stay tuned to the LakeStwardship Blog.
Note: This is not an endorsement of Enviroscience or their patented MiddFoil® process.