Studying the effects of the biological inducer Serendipita indica and the non-biological inducers chitosan and potassium phosphite in rice plants against the brown spot disease agent Bipolaris oryzae

Document Type : Research Article

Authors

1 Plant Protection. Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

2 Plant Protection . Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

Abstract

Rice is one of the most important cereals in the world, and brown spot disease is considered a significant seed-borne disease of rice, attacking and damaging the crop at all stages of plant growth, from the nursery to the field. The present study was conducted as a factorial in a completely randomized design with five treatments: potassium phosphite, chitosan, Serendipita indica, positive control, and negative control. Treated and control plants were infected with the causative fungus and sampled 24 and 72 hours after infection to measure enzyme activity. In this research, the activity of catalase and guaiacol peroxidase enzymes was higher in treated rice compared to the positive and negative controls, and the severity of Bipolaris oryzae fungal disease was lower in chitosan, potassium phosphite, and S. indica treatments than in the positive control. The results highlight the importance of employing biological methods and environmentally friendly chemical compounds in plant disease management.

Keywords

Iranian Journal of Plant Pathology
Volume 60, Issue 2
November 2025
Pages 181-192

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