author(s)
P Vijay Kumar, RVT Balazzii Naaiik, B Venkata Rajkumar, M Swetha, M Bhavyamanjari, D Vijaya Lakshmi and C PadmaVeni

abstract
Rice (Oryza sativa L.) is predominantly grown as a staple crop in the Nizamabad district of Telangana state. The average productivity of the district varies from 5 - 6 t ha ^-1 and it is a major source of earning to majority of farmers. Grain discoloration disease of rice is becoming a serious threat to rice production in the district particularly in Kharif season which caused yield losses. The influence of disease incidence and severity on grain yield and quality of the rice (Oryza sativa L.) was investigated by conducting Front –line demonstration on management of Grain discoloration in Rice (var. RNR-15048) crop during three continuous years i.e., 2017-18, 2018-19 and 2019-20 through recommended technology given by PJTSAU at farmers fields in 10 locations each year (one location is equivalent to one farmer field) by Krishi Vigyan Kendra, Rudrur, Nizamabad. Observations were recorded using Standard Evaluation Scale (SES) from 10 randomly selected hills from each location. Results revealed that, eight fungal species such as Sarocladium oryzae, Bipolaris oryzae (Cochliobolus miyabeanus), Pyricularia grisea (Magnaporthe grisea) Curvularia lunata, Phoma sp., Microdochium sp., Nigrospora sp., and Fusarium sp. were the predominant fungal species detected. By adopting the technology, lowest per cent disease incidence i.e., 8.4, 6.8, 8.6 with higher yield returns (q/ha) 66.25, 62.65, 67 with quality grains with an average increase in yield per cent of 8.16, 3.98, 19.11 was noticed in demo plots during 2017-19, 2018-19, 2019-20 respectively. Benefit-cost analysis of demo plots were significantly higher 2.17, 2.96, 2.54 compared to check plots i.e., 1.96, 2.80, 1.83 during 2017-18, 2018-19, 2019-20 respectively.