SULPHUR were first found on second-cut silage in the early 1980s. Recently, responses have been found consistently in oilseed rape grown on light land, especially in East Angola and the southern countries. 80% SULPHUR - 20% Wetting, Suspending and Dispersing Agents. WETSULF with COPPER SULPHATE 76% SULPHUR - 4% Copper Sulphate - 20% Wetting, Suspending and Dispersing Agents. When used as directed Wetsulf produces a homo-genous colloidal mixture with water and can be sprayed with a foliar sprayer or Aerial Spray.