Neoaplectana bibionisBovien was found to be considerably more effective for disinfesting blackcurrant cuttings ofSynanthedon tipuliformis(Clerck) larvae than were two other insectparasitic rhabditid nematodes,Neoaplectana carpocapsaeWeiser andHeterorhabditis heliothidis(Kahn et al.). This species of nematode caused 99.4 and 99.8% mortality of currant borer larvae in two commercial consignments of canes destined to establish some 12 ha of borer-free plantation.Spraying bundles of cuttings, stacked as a wall, with 30,000N. bibionisinfective juveniles per ml was found to be a feasible method for economically dis infesting blackcurrant cuttings on a commercial scale.No phytotoxic effects were observed following any of the treatments.