Survey for the severity of false smut of rice in hilly and coastal zones of Karnataka

Abstract

Rice. (Oryza sativa L.) is the most extensively cultivated food crop of the asia and forms a major part of nourishment for half of the world’s population. Roving survey conducted in Kharif 2017 provided the present status of the disease in different hilly and coastal zones of Karnataka. The overall mean disease severity of false smut disease of rice in hilly and coastal zones of Karnataka was ranged from 9.48 to 69.87 per cent. Highest mean disease severity was observed in hilly zone of Kodagu district (69.87%) followed by coastal zone of Udupi district (34.36%), hilly zone of Chickmagaluru (28.68%) and least mean disease severity (9.48%) were observed in hilly zone of Shivamogga district. Among different taluks, mean disease severity of false smut disease was ranged from 7.81 to 75.20 per cent of which highest mean disease severity was recorded from the Virajpet taluk (75.20%) followed by Somwarpet (64.53%), Brahmavar (50.96%) and least disease severity 7.81 per cent was recorded from Shivamogga taluk. Genotype-wise survey results indicated that the maximum disease severity was recorded in Tunga variety (67.27%) followed by MO-21 (53.64%), MO-4 (45.61%) and least disease severity (4.55%) was recorded in Jyothi variety.