Final diagnosis


Root burn disease (Olpidium brassicae)

Many seedlings exhibit an overall browning of the root system which seems to be completely decayed. <i><b>Olpidium brassicae </b></i>(Olpidium seedling blight)
One may observe an abrupt change in the diameter between the stem and collar which is constricted and decayed. <i><b>Olpidium brassicae </b></i>(Olpidium seedling blight)
Brown and ramified mycelium of <i><b>Rhizoctonia solani</b></i> is easily observed on this root system.
Sporangia (S) and chlamydospores (resting spores) (C) of <i><b>Olpidium brassicae </b></i>filling certain root cells.