Field Screening Traditional Rice Varieties Against Brown Spot Disease of Rice

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Field investigation evaluated brown spot disease resistance in 150 traditional rice varieties, highlighting the lack of effective resistance genes.

None of the traditional rice varieties exhibited resistance or moderately resistant reactions to brown spot disease, revealing a significant vulnerability.
Disease severity assessments showed a wide range among 150 traditional rice varieties, but no significant resistance was found against Bipolaris oryzae.
Screening was conducted under field conditions using artificial inoculation with a virulent isolate of Bipolaris oryzae to evaluate resistance potential in rice varieties.
Findings underscore the need to explore novel resistance sources from landraces or wild relatives for effective management strategies.

Vijayalaxmi et al. (2025) studied this question.

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Field investigation evaluated brown spot disease resistance in 150 traditional rice varieties, highlighting the lack of effective resistance genes.