Preharvest defoliation of rutabaga with ammonium peroxydisulphate and ethephon

SummaryAmmonium peroxydisulphate applied to the point of runoff in aqueous concentrations of l%-2% was effective as a preharvest defoliant promoting abscission in rutabagas. It also restrained root growth and so could provide some protection against the production of large-sized less-marketable roots. Ammonium peroxydisulphate was compatible with ethephon supplied as Ethrel and the two substances together provided a superior defoliating treatment.