John Fitzgerald,
I had a problem with excessive cattails by the emergency spillway at my pond earlier this year. In years prior I would pull them out and dispose. Never again! This year I put on a rubber gloves, an old oven mitt and poured concentrated glyphosate on the oven mitt. Next it was just a matter of wiping the glyphosate on the cattail leaves. In about a month you couldn’t even tell they used to be there. I’m pretty sure TJ calls it the glove treatment or something like that. All I know is this is the only way I will ever deal with cattails again!