I can personnaly attest that grass carp like water lilies, and pickerel rush but not the yellow water iris or water willow. I have abundant irises and water willow but if I want to grow water lilies or pickerel rush I have to enclose them with chicken wire pens-and if there are small gaps in the fencing they will search them out to get inside to get to the plantings.
Have purchased a bowfishing setup to attempt to address the grass carp situation. My problem with catching them with corn or bread is that bluegills and catfish always want to steal the bait before the grass carp get to it. Also, the carp are so hook shy that you have to use a very small hook making landing them very dicey due to the small tissue bite you have for purchase during the fight.
