This diseases causes seed rotting, pre-emergence damping off. The disease appears in circular patches in the field here and there.
All the affected plants get killed. if the disease occurs prior to seed germination, it causes gappiness.
The seeds or seed materials are killed before their establishment.
The disease also occurs after establishment of the crop i.e after 15 to 30 days of sowing or planting. This stage is called post-emergence damping off.
If the disease occurs very late, it causes stunting of the plant and rotting of the roots.
The disease is caused by complex of Pythium aphanidermatum , P. debaryanum and P. ultimum
Seed treatment with Thiram or Captan @ 4g/kg. The bulbs may be dipped in Thiram solution 0.25%.
After sprouting, the root region of the plants along the rows should be given a soil drenching with Copper oxychloride 0.25%.
