Had a huge problem with Marestail on a plot of land I bought to build my new house on. I tried all off the shelf weed killers to clear it, i even tried scraping the top 14 inches of soil off with a JCB, it just came back. After researching this weed further on line & watching some videos from Pro Green, I decided to try Kurtail Gold weed killer as advised by Pro Green to resolve my Marestail weed issue. The videos Pro Green have on You Tube don’t lie. This product has definitely done the job. I keep getting the odd new shot come through in un treated areas but the rest has rotted away & not returned. Thanks Pro Green. The picture shows a new Marestail shoot after 3 days of being treated.