I live on one acre and have lots of weeds and Kudzu to kill. I have been spraying the Kudzu for 6 years now and it is a lot better than when I moved in. I keep cutting back the brush and vines with the brush eater and spraying Bayer Bioadvanced Brush Killer Plus. I have a bad back, once a week I visit the chiropractor, and the Itisll one gallon sprayer I bought, works great, but takes a lot of refills to get the job done.