Open AccessPathogens associated with grain discolouration and their management in paddy (Oryza sativa L.)
Author(s) -
K. B. Yadahalli,
Jyoti A. Konnur
Publication year - 2021
Publication title -
international journal of agricultural sciences/international journal of agricultural sciences
Language(s) - English
Resource type - Journals
eISSN - 0976-5670
pISSN - 0973-130X
DOI - 10.15740/has/ijas/17.2/250-255
Subject(s) - mancozeb , biology , tebuconazole , curvularia , alternaria , fungicide , bipolaris , carbendazim , potato dextrose agar , fusarium , crop , horticulture , agronomy , rhizopus , panicle , propiconazole , veterinary medicine , agar , food science , genetics , bacteria , fermentation , medicine
Grain discoloration complex disease of rice is an emerging threat to rice crop all over the world and it acquires particular importance as it results in qualitative loss of harvested crop. So the present study was carried out to identify different fungi associated with disease and their management. The discoloured seed samples were collected from different farmer’s field during survey. Totally seven fungi including both saprophytic as well as pathogenic were isolated and identified from both blotter and potato dextrose agar method viz., Curvularia lunata (36.30 %), Helminthosporium oryzae (25.6 %), Fusarium moniliformae (19.6 %), Colletotrichum gloeosporioids (8.1 %) and Alternaria spp. (7.01 %) were predominantly associated with discoloured paddy seeds. Other saprophytic fungi like Aspergillus spp. (16.6 %) and Rhizopus spp. (12.1 %) were frequently observed. Similarly among the eleven treatment including control, seed treatment with carbendazim 50 WP (2 g kg-1) with two sprays of tebuconazole 250 EC at 0.1 per cent concentration and tricyclazole 18 % + mancozeb 62 % WP at 0.2 per cent first spray during flowering stage and second spray during 15 days after first spray reducing discoloured panicle by 61.46 per cent and 59.92 per cent, respectively.