N. Rajinimala1*, K. Elanchezhyan2, K. Kavitha 3 and J. Sheela1
1 Department of Plant Pathology, Tamil Nadu Agricultural University, V.O. Chidambaranar Agricultural College and Research Institute, Killikulam
2 Department of Agricultural Entomology, Tamil Nadu Agricultural University, V.O. Chidambaranar Agricultural College and Research Institute, Killikulam
3ICAR Krishi Vigyan Kendra, Thirupathisaram, Kanyakumari District- 629 901
Email: rajinimala@tnau.ac.in
Received-01.02.2025, Revised-14.02.2025, Accepted-27.02.2025
Abstract: Roving survey was conducted in different blocks of Tirunelveli and Tenkasi districts during Pishanam 2023-24 for the occurrence of major rice diseases viz., blast, bacterial leaf blight, false smut, sheath blight, brown spot and grain discoloration. Among the surveyed locations of Tirunelveli district, the maximum incidence of blast (20.69 PDI) and Sheath blight (19.56 PDI) diseases were recorded in Veerava Nallur and Karukuruchi villages of Cheran Mahadevi block respectively. The maximum incidence of Bacterial Leaf Blight (30.56 PDI), False smut (28.56 PDI) and brown spot (20.85 PDI) diseases were recorded in Ayan Singampatti, Mananallur and Kela Ermal puram villages of Ambasamudram block respectively. The maximum incidence of Grain discolouration (18.78 PDI) was recorded in Kalakudi village of Mannur block. Among the surveyed locations of Tenkasi district, the maximum incidence of blast disease (12.31 PDI) was recorded in Kidarangulam village of Alankulam block. The maximum incidence of Bacterial Leaf Blight (19.56 PDI), false smut (22.47 PDI), sheath blight (11.58 PDI), brown spot (19.75 PDI) and Grain discolouration (19.58 PDI) diseases were recorded in Kalitheerthan patti, Sambankulam, Anantha Perumal Nadanoor, Keezha Kadayam and Venkatampatti villages of Kadayam Block respectively.
Keywords: Rice, Bacterial leaf blight, Blast, Brown spot, False smut
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