NARCISSUS bulbs infested with stem eelworm (Ditylenchus dipsaci (Kiihn) Filipjev) deteriorate rapidly when stored in open trays from lifting-time in July or August until replanting in the autumn. Early lifting and hot-water treatment (Hastings and Newton, 1934;Horton, 1958;Slootweg, 1963) ensures that fewer eelworms have reached the more resistant ' wool-stage' (Hastings and Newton, 1934;Woodville and Morgan, 1961; Woodville, 1964;Green, 1964), and that they have less time in which to damage the bulbs and initiate decay than would be allowed by later treatment. Furthermore, Fox Wilson (1948) recorded that breeding continues within the bulb during storage, and although he gave no figures to show its extent it has always been assumed that the earlier the treatment, the fewer eelworms there are to kill.