Vol. 11, Issue 8 (2022)

Author(s):
S Suresh Rao, M Reddi Kumar, P Madhusudhan and B Ravindra Reddy

Abstract:
Grain discoloration of rice is a complex disease occurred, due to infection by certain microorganisms, especially fungi on glumes, kernels or both. The incidence of rice grain discoloration was ranging from 36.85% to least 20% in Nellore and Chittoor districts. So emphasis had been laid to isolate the mycoflora associated, with rice grain discoloration and their identification was carried out. A total of seven fungal genera using blotter method and twelve fungal genera using agar plate method were isolated viz; Alternaria alternata, Aspergillus flavus, Aspergillus niger, Bipolaris oryzae, Curvularia lunata, Curvularia clavata, Fusarium moniliforme, Fusarium oxysporum, Sarocladium oryzae, Rhizopus stolonifer, Chetomium sp. and Alternaria padwickii. The pathogenic fungi species associated with rice grain discoloration in this study are of having Economical significance as it causes both qualitative and quantitative losses of grain yield and also results in seedling mortality, reduction in germination and Seedling vigour.