A. BalamuruganDepartment of Plant Pathology (Student)Madurai Agricultural College and Research Institute (TNAU), Tamil Nadu, India Email: email@example.com
Host: Oryza sativa L. (rice)Disease name: Brown leaf spot or sesame leaf spotPathogen name: Bipolaris oryzae (Breda de Haan) Shoemaker
Brown leaf spot occurs in all rice-growing areas and was responsible for the Bengal famine in 1942. The disease attacks the crop from the seedling stage in the nursery to the milk stage in the field. Spots vary in shape and size and appear on the coleoptiles of the leaves, leaf sheath, and glumes. On the coleoptiles, the spots may be brown, small, and circular or oval. These spots look like sesame seeds; hence, the alternative name, sesame leaf spot. Sometimes spots are surrounded by yellowish halos, and they may coalesce.
Management strategies include the use of fungicides at tillering and late booting stages and growing resistant cultivars such as Co44 and Bhavani.
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