1.Improve the drainage system.
2.Keep the field clean from weeds.
3.Do not over irrigate.
4.Earthing up of the tubers.
5. Bury or burn the affected plants .It may infect good plants.
6.Spray @ (Thiophenate methyl-15 gm + Streptocycline-1.5 gm or Plantomycin-15 gm) in 15 liters water.
Use potato tubers for seed from disease-free areas to ensure that the pathogen is not carried through seed tuber.
The infected plant material in the field should be properly destroyed.
Grow resistant varieties like Kufri Navtal.
Fungicidal sprays on the appearance of initial symptoms. Spraying should be done with Dithane M-45 or Dithane Z-78 (2.5 kg/I 000 litres of water per hectare). Spraying should be repeated at 10-12 days' interval.
Of late latest fungicides like Curzate is being tried which is giving good results