Personally I have no information on this ever having been tried as a gizzard shad managmeent tool. If you know of qualifed research data out there somehere, point me to it. Without published findings by professional fisheries folks, after comprehensive research, I don't think any idea is subject to serious consideration in the field. I'm sure there are things out there that we don't know about yet, and maybe someday those ideas will become mainstream. Untill that happens people like me have no real choice but to follow the advise of the fisheries biologists. I feel fortunate that here in Indiana we have some very good ones.