Bill :

The Miss. Pond Mgt. book by the Coop. Ext. Service {Miss. State Univ. in coop. with DWF&P} lists 3 cattail controls-- Reward , Sonar and Rodeo. But this is dated. I suggest you look into Habitat it has worked well for me. I would not use Reward as all it will do is burn back foliage where Habitat and I assume Sonar will kill the plant roots and all. ewest