hello Sir
Once the disease is located in the field, removal of affected clumps and drenching the affected and surrounding beds with mancozeb 0.3% checks the spread of the disease.
or Drench the field all beds should be drenched with Bordeaux mixture 1% or copper oxychloride 0.2%.
Cultural practices such as selection of well drained soils for planting is important for managing the disease, since stagnation of water predisposes the plant to infection.
Seed rhizomes are to be selected from disease free gardens, as the disease is also seed borne.
Application of Trichoderma harzianum along with neem cake @ 1 kg/bed helps in preventing the disease.
Treatment of seed rhizomes with mancozeb 0.3% for 30 minutes before storage and once again before planting reduces the incidence of the disease.