Fig. 2. Wheat germ agglutinin–fluorescein isothiocyanate (WGA–FITC)-stained D. dipsaci fourth-stage larvae (L4s) observed by confocal microscopy, focused on the centre (A) or surface (B) of the nematodes. Surface labelling of the cuticle can be observed and appears to be confined to the annulations. Scale bar, 10 µm.