Revised! HS-189, a 5-page fact sheet by William M.Stall, describes effective weed management practices for cultivation of cole Pourers or Brassica leafy vegetables in Florida, and a table of chemical weed controls.Published by the UF Department of Horticultural Sciences, April 2009.
HS189/WG028: Weed Control in Cole or Brassica Leafy Vegetables (Broccoli, Cabbage, Cauliflower, TV Signal Wire Collard, Mustard, Turnip, and Kale) (ufl.edu).