It will slowdown the spread of cattails, but I have them coming up through even tighter rocks than rip rap. Best plan of attack is to remove all new growth asap. As in as soon as you see it. Heavy duty landscape fabric under the rip rap would work wonders. I do a lot of that now. Puts me out of work for cattail removal, but in some places like rockfilled spillways and shallows that are exposed during drawdown it is really the right way to go. I laways have some cattails to remove.
Thanks!! Care to come to SE Indiana and fix the problem..lol Nobody in my area even deals with cattail removal...2.5 Acers and as you can see from the Google Earth Photo...I have the issue all the way around the pond, almost filling in and choking out two small coves...You can also see recent photo's here...
http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=225443#Post225443And below a birdseye view from Google Earth
