Keystone Pest Solutions lists Raptor and Thunder as being viable alternatives too. You can use their website to look up any herbicide and they do a good job of listing recommended generics.

http://www.keystonepestsolutions.com/sea...mp;keyword=Slay

"When there was no fowl, we ate crawdad, when there was no crawdad, we ate sand."

"YOU ATE SAND!" - Raising Arizona