Why desiccate with Roundup?

Timely and efficient oilseed rape harvesting is becoming increasingly challenging.

  • Greater acreages of OSR need to be harvested with less manpower
  • Agronomic improvements mean thicker and greener OSR stems
  • Rotational pressures make well-timed and managed OSR harvesting more critical

Most OSR crops can be direct combined following Roundup conditioning in most seasons without difficulty.

  • Ensuring the most even ripening and earliest harvest
  • Saving fuel and time by increasing combining speeds
  • Maximising both oil contents and yields
  • Saving on drying and cleaning costs
  • Minimising pod shatter and volunteer problems
  • Improving annual and perennial weed control

Roundup desiccates the whole plant including the stems.  There is less green material ensuring a cleaner, dryer sample with lower admixtures.


  1. DO NOT use Roundup on crops grown for seed production.  It is recommended that an unsprayed strip should be left where farm-saved seed is likely to be kept.
  2. Poor results can be expected from treatment of heavily laid crops with major levels of secondary growth or significant areas of uneven ripening, such as pigeon damage or poor drainage.
  3. Poor results can be expected from laid crops where the stems have broken due to interruption of translocation below the fracture.  Kinked stems should not prove a problem.
  4. DO NOT use treated straw as a horticultural growth medium or as a mulch.
  5. DO NOT attempt to harvest within 14 days.  Up to 21 days may be needed according to growing conditions.