It does work, but this is really over-rated. It takes at least a week to work for me at the 2.3oz per gal rate. I actually used 3oz because 2.3oz is just silly. Still takes days and days to show any sign of working. After about 7-10 days it is finally dead. Just don't expect instance satisfaction. I think I'll try something like a Roundup QuickPRO next time. The fastest stuff I've found is Spectracide at Lowes - that is brown and down within hours!!! But at the volumes I need, it's cost prohibitive.