Formerly International Journal of Basic and Applied Agricultural Research

Geospatial survey of rice sheath blight in Uttarakhand

ASHISH SINGH BISHT and BIJENDER KUMAR
Pantnagar Journal of Research, Volume - 22, Issue - 3 ( September-December 2024)

Published: 2024-12-31

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Abstract


Rice sheath blight, caused by Rhizoctonia solani AG1-1A, is a significant threat to rice cultivation, second only to rice blast. To evaluate its spatial distribution in Uttarakhand, a GIS-based survey was conducted across 13 districts during the Kharif seasons of 2022 and 2023. The surveys revealed distinct spatial patterns of disease incidence (DI) and percent disease index (PDI). The lowest DI and PDI were recorded in the hilly regions of Kumaon and Garhwal, while the highest values were observed in the plains of Kumaon, followed by the plains of Garhwal and the Bhabar regions of Kumaon. Among the districts, Udham Singh Nagar exhibited the maximum DI (64.49%) and PDI (46.60%), whereas Champawat recorded the lowest DI (6.53%) and PDI (2.25%). These findings highlight the role of GIS in identifying disease hotspots and informing targeted disease management strategies


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