Evaluation of Triazole and Strobilurin Fungicides against Leaf and Panicle Blast of Rice in Farmer's Field

Blast disease of rice caused by the ascomycetes fungus Magnaporthe grisea poses a major threat to production from terai hilly region Nepal. Field trials were conducted in two successive years, 2021 and 2022 at Bharatpur-5, Chitwan farmer's field producing seed Hardinath-1 variety with main objective finding effective single and/or pre-mix formulation triazole strobilurin fungicides against blast that could be an alternative tricyclazole. The randomized complete block design three replications eight treatments viz. azoxystrobin 18.2% + difenoconazole 11.4% SC, propiconazole 13.9% EC, 11% tebuconazole 18.3% 23% 25% 25%WDG control. applied during tillering heading stage rate 0.1%. All significantly reduced leaf panicle severity resulting higher yield. Among tested fungicides, fungicide EC SC gave excellent performance lowest Hence, these used for management However, controlling has become increasingly challenging due pathogens' capacity adapt evolve into new, more potent strains, making control this difficult.