Rhizoctonia damping-off is a fungal disease that begins as water-soaked lesions on lower stems of seedlings; this results in yellowing, wilt, and necrosis of foliage. (Photo: Kenneth Seebold, UK)

As Rhizoctonia damping-off infections advance, leaf and stem tissues decay. (Photo: Kenneth Seebold, UK)

Looking closely at this severely diseased seedling, mycelial strands of the Rhizoctonia fungus can be seen. Notice how severely decayed this seedling is. (Photo: Kenneth Seebold, UK)

Very young seedlings that are infected may decay completely, leaving apparently empty cells in the float tray. (Photo: Kenneth Seebold, UK)