Field Efficacy of Fungicides Against Neck Blast of Rice Caused by Pyricularia Oryzae Cavara

Rice blast disease caused by Pyricularia oryzae Cavara is one of the most important fungal diseases of rice. Out of the different phases of blast disease, neck blast is the most destructive phase throughout globe and is more detrimental causing 1.83–7.5% reduction in grain yield. In the present investigation, nine fungicides viz; tebuconazole 25.59% EC @1.5ml/l, kresoxy methyl 44.3% SC 1ml/l, pyraclostrobin 100g/l CS 2ml/l, picoxystrobin 22.52 w/w SC 1.2ml/l, kasugamycin 5 % + COC 45 % WP 1.87 g/l, kresoxim-methyl 40% + hexaconazole 8% WG @ 1ml/l, tebuconazole 50% + trifloxystrobin 25% w/w WG 0.4 gl/l, azoxystrobin 18.2% w/w + difenoconazole 11.4% 1ml/l and isoprothiolane 40% EC @1.5ml/l were evaluated against neck blast in randomized block design under field conditions at Agricultural Research Station, Nellore for three years (2020-21 to 2022–23). Three years pooled analysis results revealed that out of nine fungicides evaluated tebuconazole 50% + trifloxystrobin 25% w/w (75% WG) @0.4 g/l recorded highest per cent reduction of neck blast (77.73%) and it is being recommended to farming community to manage the disease