The disease occasionally occurs in serious form.
The lower portion of the stem is affected from the soil borne inoculum (sclerotia).
Decortications is the main symptom.
Exposure and necrosis of underlying tissues may lead to collapse of the plant.
Near the ground surface on the stem may be seen the mycelia and sclerotia.
Lack of plant vigour, accumulation of water around the stem, and mechanical injuries help in development of this disease.