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1. Causal organism: Sarocladium oryzae (Sawada) W. Gams & D. Hawksw.
2. The pathogen generally attacks the upper most leaf sheath enclosing the young panicles.
3. Oblong or irregular spots with chocolate brown colour develop on the boot leaf sheath. Sheath rots disease of rice, caused by Sarocladium oryzae.
4. It inflicts damage to the uppermost flagleaf sheath by infecting the sheath covering the young panicles at the booting stage.
5. The young panicles are generally affected, leading to an increase the percentage of chaffy, discolored, and shrivelled grains and a reduction in weight and number of healthy grains.