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
it is one thing to do a off label applications. It is total stupidity to post it on the world wide web and expect people to approve.
You can lead a Donkey to water but you can't make the Jackass Drink