Abstract

Date of sowing has profound effect on the development of brown spot disease and yield of rice. Crop sown on 15th May recorded maximum yield 5050 kg ha with minimum build up of disease severity 4.5 per cent. Contrary to this, late sown crop yielded the least (2896 kg ha'') with maximum disease severity of 21.1 per cent. Out of 157 varieties/entries screened against brown spot disease of rice, only 2 entries IET 13818 (OR 165-97-15) and IET 13830 (Rewa 14-174) showed highly resistant reaction and others were categorised as resistant, moderately resistant, moderately susceptible, susceptible and highly susceptible

Keywords: Brown spot, Rice, Drechslera oryzae