Stem nematode on narcissus and tulip.
Great Britain.Ministry of Agriculture, Fisheries and Food.
Central Science Laboratory (Great Britain)
Poster showing images of tulip and narcissus infection by stem nematodes.
Title from item.
Text continues: "Stem nematode, Ditylenchus dipsaci, is a devastating plant-parasitic nematode which mainly attacks narcissus and tulip. On narcissus, rough yellow swellings (spickels) may appear on leaves. Stunted or distorted plants, gaps and late flowering patches in fields also indicate attack. Bulbs initially show spongy areas within the scale leaves which develop into orangy-brown regions. On tulips, white or purplish marks are seen at the top of the stem just before flowering. Bulbs develop grey or shiny brown patches on the outer scales."
"If you suspect the presence of this pest on registered premises, you should immediately contyacy your local MAFF Plant Health and Seed Inspector of the PHSI HQ, York."
Poster warning of the danger of the stem nematode to plant life.
Poster showing images of tulip and narcissus infection by stem nematodes.
Ditylenchus dipsaci