Final diagnosis


Olpidium virulentus (Olpidium brassicae, Fungal vector virus)

In the cells of the root cortex of diseased plants, one can easily observe the presence of sporangia and resting spores of the vector fungus: <i> Olpidium brassicae </i>. <b> Lettuce ring necrosis agent </i>, LRNA)
Sporangia and "chlamydospores" (resting spores) of <b> <i> Olpidium virulentus </i> </b> (ex <i> Olpidium brassicae </i>, fungal virus vector) are contained in several host root cells.
This fungus is also characterized by resting star-shaped spores. <b> <i> Olpidium virulentus </i> </b> (ex <b> <i> Olpidium brassicae </i> </b>, fungal vector virus)