About 25-30% of Scottish raspberry plantations are infested with root-lesion nematode (Pratylenchus penetrans). In field trials at 5 localities the soil sterilant dazomet, applied pre-planting at 336 kg/ha, reduced nematode populations and increased cane growth better than the nematicide aldicarb at 6.6 kg/ha. Pot trials indicated the involvement of one or more fungi in the disorders.