Division of Plant Pathology, S.K. University of Agricultural Sciences and Technology of Kashmir, Shalimar, Srinagar (J&K)
National Symposium on “Plant Pathology in the Changing Global Scenario” held at National Bureau of Plant Genetic Resources, New Delhi on February 27–28, 2009
The local susceptible variety K-448 was sown under hundred percent irrigated ecosystem on 5th May and transplanted on 10th June to find the efficacy of the test fungicidal formulations against leaf blast, neck blast and sheath blight diseases at Rice Research and Regional Station, Khudwani. Natural infection of leaf blast and sheath blight was observed on 10th August. Four fungicidal sprays were given, two each in August(11th and 26th) and September(10th and 25th), just a day after taking the disease observations. The terminal disease severity of leaf blast, sheath blight and neck blast was taken on 25th, 26th and 29th of September, when the severity of these diseases was 21,10 and 3 per cent, respectively in the untreated check plots. Grain yield data were also recorded after the crop harvest on 10th October. Tricyclazole + Mancozeb 80WP and Hexaconazole + Zineb72WP combinations @2.0 and 2.5g/litre of water were found highly effective in checking the leaf blast (7.4 and8.5 & 8.1 and 8.7%) and sheath blight infection (7.5 and 7.9 & 3.8 and 4.17%, respectively) and increasing the grain yield (65.5 q/ha). The efficacy of these molecules is at par with the respective standard check fungicides.
