Thanks for the info guys. It seems my plot mainly consist of some type of stingweed?, along with some Kochia, Pigweed and Lamsquarters weeds. After cuting the weeds down, my arms were slighty swollen from touching them and the sting from the weeds stayed in my arms for about 24-48 hours. So it looks like the Slay would be best for my needs. Thanks for the help.