It comes in the early stages i.e up to six weeks from sowing.

Drying plants whose foliage turns slightly yellow before death, scattered in the field is an indication of the disease.

Seedling become chlorotic.

The joint of stem & root turns soft slightly contracts and begins to decay.

 Infected parts turn brown white.

Black dots, like mustard in shape known as sclerotia are seen appearing on the white infected plant parts

Deep ploughing in summer.

Avoid high moisture at the sowing time.

Seedlings should be protected from excessive moisture.

Destroy the residues of last crop and weed before sowing and after harvest.

All un decomposed matter should be removed from the field before land preparation.

Treat the seeds with a mixture of Carbendazim 1g per kg of seed.