Aww hell, man.... This isn't bass fishing, nor anything technical....
Get some fishing buddies who have waders or boats, buy yourself a large cast net, and go get 'em!
You ever give bow fishing a try?
I've never done it before, was supposed to go once this year for Commons with a buddy on my local backyard river (salt creek), but never went. It's done a lot at night and people have a smashin' time doing it.
Try snagging too. Don't know if it's legal on IL river or not, but since these things are everywhere, I think it would be acceptable by now.
Although they do feed off of plankton on or a few feet from the surface, I'm sure a few tackle companies will begin manufacturing plankton style topwater surface baits. Might be hard to do, but seems like it can be a possibility.... :lol:
The only thing I wouldn't do is to throw sticks of dynamite, like what these people in California did to eradicate Northern Pike from a prime trout lake... By doing that, the most they've killed were like 3 fish.... :lol: :lol: Idiots.
http://fishing-headquarters.com/fishcast/?cat=5&paged=2
I think the best way to control these fish and to best utilize the unwanted resource is to send as many commercial netting crews and fisherman to the IL river. With each catch and net job, we can either turn the unwanted fish into cat or animal feed, and any leftovers we can send back over to countries in Asia.... If commercial fishermen do this and sell to Asia (china, etc) which is where these fish originate from, they could get some good profits I think. Since we'll never have any regulations for these fish here, I could see something like this happening if Illinois and the states bordering the Mississippi River watershed give it some good thought. Commercial fisherman have to get bored with the great lakes fishing sooner or later.... With its huge-ass population and good economy, China has the money to spend for imported fish anyways.....