Efficacy of fungicides and biocontrol agents against Bipolaris oryzae, the causal agent of brown spot of rice

NIMISHA  MAURYA; BIJENDRA  KUMAR; R P  SINGH; RASHMI  TEWARI; ASHISH SINGH  BISHT

doi:10.56093/ijas.v95i7.146308

Authors

NIMISHA MAURYA Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar, Uttarakhand 263 145, India
BIJENDRA KUMAR Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar, Uttarakhand 263 145, India
R P SINGH Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar, Uttarakhand 263 145, India
RASHMI TEWARI Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar, Uttarakhand 263 145, India
ASHISH SINGH BISHT Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar, Uttarakhand 263 145, India

https://doi.org/10.56093/ijas.v95i7.146308

Keywords:

Bioagents, Bipolaris oryzae, Rice, Secondary metabolites

Abstract

Rice faces significant losses by the brown spot disease caused by Bipolaris oryzae, can be mitigated by the application of fungicides and biocontrol agents for effective disease management. This study found that Tebuconazole (25.9% ec) was the most effective fungicide, while a combination of T. harzianum and Pseudomonas fluorescens offered the best disease control and highest yield in the field. The biocontrol agents also enhanced the defense enzyme activity (PAL, POD, PPO). These findings support an integrated disease management strategy that uses both fungicides and biocontrol agents for optimal disease control and improved yield.

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