Rodeo is the old name for aquamaster. Yes catails are hard to kill and fall applys work better because they are dying out. A good apply in the spring on emerging catails will help keep them at bay. Good Luck
You can lead a Donkey to water but you can't make the Jackass Drink
"As Americans you have the right to be stupid." John Kerry
"Life is tough, but it's tougher when you're stupid.” John Wayne.