Vol. 11, Issue 7 (2022)

Author(s):
AM Tirmali, Balgude YS and KS Raghuvanshi

Abstract:
Rice (Oryza sativa L.) is the most important food crop of the world. Among the biotic stresses, false smut is an emerging disease caused by Ustilaginoidea virens. Very few rice cultivars have moderate level of resistance and majority of the commercially cultivated varieties do not show any resistance to false smut. A field experiment to evaluate bio-efficacy of solo and combination fungicides against false smut disease of rice was conducted during Kharif 2019. Experiment was laid in a randomized block design with seven fungicide treatments and four replications in rainfed lowland rice ecosystem. Results from the present investigations, revealed that two sprays of Tebuconazole 50% + Trifloxystrobin 25% WG at Booting + 50% Flowering(0.1%) was found significantly superior over other treatments in restricting the false smut upto 4.83% in comparison to control. Tebuconazole 50% + Trifloxystrobin 25% WG also fetched highest grain yield (39.23 q/ha) and straw yield(43.69 q/ha) was followed by Copper Hydroxide 53.8% DF (0.1%) @ Booting + 50% Flowering) and were at par with each other.