I tried resolve 30 on my small paddock this year and within 24 hours I could see the rag dying. They had it on a special offer in home bargains £3.99 for a large spray bottle, so I bought 2 and it took 1 bottle for me to do a paddock with which had quite a bit rag in it. It killed rossettes and plants that had begun to flower too, I innitally bought it to kill weeds on my hard core in front of stable, and just tried it on a few rag plants and it was amazing to see the difference in 24 hours