In that case, 2-4D. Their patent I believe has expired also because there are several companies that put out a product by that name now. Last time I bought it you had to have a liscense to buy the 5 gallon jugs but could buy all the 2.5 gallon jugs you wanted.
re: Best weed and grass killer for the ditch?(Posted by TigerDat on 3/17/11 at 7:49 am to dirtyred)
You must have a licence to buy all 2-4d products now. If you know any farmers they may sell you some on the side though. That is how I get mine. The stuff is amazing we drilled a hole in a tree and filled it up with that stuff and the tree was dead in about a week
I use a mixture of 2-4-D and Razor. Sahara and 2-4-D is a good mixture but you need an agitator for the Sahara. After you burn it to the ground use Diuron as a soil treatment to prevent growth from starting.