Stem eelworm on narcissus
Great Britain. Agricultural Development and Advisory Service.
Pinner Ministry of Agriculture, Fisheries and Food
1974
Previous ed.: / issued by the Ministry of Agriculture as 'Stem and bulb eelworm on narcissi, hyacinths and related bulbs'. London : H.M.S.O., 1957
Daffodils
Nematoda
Ditylenchus dipsaci.