Brown patch of turf, Belly rot of squash, Damping off, Web blight Rhizoctonia is the most important pathogen worldwide. It causes a variety of different disease including damping-off. Symptoms vary, but usually affected tissue has brown, round to irregularly shaped spots.
Infection is often at the soil line or just below.
Under warm, wet conditions, Rhizoctonia can cause an aerial or web blight, infecting the interior of densely-growing plants including azaleas and hollies. Rhizoctonia does not produce spores.