Integrated management of blast disease of rice

Abstract

Field application of burnt rice husk ash, foliar sprays with silicon, chitosan, tricyclazole and neemazal were evaluated in possible combinations to assess the integrated effect of these combinations on leaf blast severity on susceptible variety Ratnagiri-24. Least PDI (21.85%) was recorded in treatment T5 (burnt rice husk ash @ 4 t/ha + 3 sprays of tricyclazole 75% WP @ 0.1%) followed by T2 (burnt rice husk ash @ 4 t/ha + 2 sprays of silica 5% WS @ 0.4%) (30.00%). Highest grain yield (33.37 q/ha) was recorded in treatment T5 (burnt rice husk ash @ 4 t/ha + 3 sprays of tricyclazole 75% WP @ 0.1%) followed by T2 (burnt rice husk ash @ 4 t/ha + 2 sprays of silica 5% WS @ 0.4%) (30.41 q/ha).