IR-20, Utrirajapan, Virippu, Daya, Moti, Habiganj, Jeera, Saket-4, IR-48, IR-34 and TN1 were used as differentials to differentiate various isolates of tungro namely Burdwan (West Bengal), Cuttack, Konark, Jajpur, Salipur, Bhadrak (Orissa) etc. Moti was susceptible to Cuttack and Salipur isolates. Saket-4 was susceptible to Burdwan and Jajpur isolates. Virippu cultivar was found susceptible to Konark isolate. Habiganj was susceptible to Bhadrak isolate. All other differentials were found resistant to all the tungro isolates.