I have some large monocultures of water pepper and I just got permission from the farmer to spray. My question is should I spray 2,4, d or glypho? I would like to get a good release of grasses. We are located in Texas, south of Houston. I have never sprayed before due to the farmers request but this year he changed his mind. Looking to get after it in the next month aggressively. There are also some cattails growing that I would like to knock out.