Clethodim (Prism, Select, Arrow)
Clethodim is a postemergent herbicide for the control of annual and perennial grasses. It does not control sedges or broadleaved weeds. Rate varies depending upon the weed species and stage of growth. Apply higher rates to control perennial grasses. Do not apply to grasses that are under stress. EPA requires the signal word "WARNING" to appear on the label. A reentry restriction period of 12 hours is required after application. It is sold under two brand names, Prism and Select.