Final diagnosis


Athelia rolfsii (Sclerotium rolfsii) (stem rot athelia)

A rot has settled on several leaves and at the neck of this young lettuce which is in the process of collapsing. <b> <i> Athelia rolfsii </i> </b> (<i> Sclerotium rolfsii </i>, "southern blight")
A dense, white and radiant mycelium characterizes the presence of this fungus. <b> <i> Athelia rolfsii </i> </b> (<i> Sclerotium rolfsii </i>, "southern blight")
Circular sclerotia (0.5 to 1.5 mm in diameter) form within the mycelium; their color changes from white to more or less dark brown. <b> <i> Athelia rolfsii </i> </b> (<i> Sclerotium rolfsii </i>, "southern blight")
We can easily distinguish the loops of anastomosis of this basidiomycete on its mycelium. <b> <i> Athelia rolfsii </i> </b> (<i> Sclerotium rolfsii </i>, "southern blight")