I call it the Stawp pronounced 'stop'. The local city decided that they needed to put sidewalks on my street [ which is not in the city limits, county said ok ]. When the sidewalks were finished the contractor hydroseeded and we ended up with some fast growing very tall , broad leaf 'grass' along with the desired grass. After a couple of weeks of cogitation this is what I came up with. I use a chip brush to spread a thin coat of Round Up on the PVC pipe and then roll over the tall grass. I did some test areas this evening and we will see how it works.