In vitro efficacy of combi product fungicides against Magnaporthe oryzae causing blast of rice

Abstract

Blast of rice has observed as the devastating disease affecting both grain and fodder production in rice. Many fungicides have been considered in the past to manage blast of rice, but combi product fungicides are the better option. Six combi product fungicides were evaluated at three concentrations (500 ppm, 1000 ppm and 1500 ppm) under in vitro condition by poisoned food technique against Magnaporthe oryzae in Department of Plant Pathology, Collage of Agriculture, University of Agricultural Sciences, Dharwad, Karnataka, India. The sesults showed that, out of six fungicides tested four fungicides viz., tebuconazole 50% + trifloxystrobin 25%, hexaconazole 4% + zineb 68%, carbendazim 12% + mancozeb 63%, captan 70% + hexaconazole 5% at all three concentrations and tricyclazole 18% + mancozeb 62% at 1500 ppm have recorded cent per cent mycelial growth inhibition. Least per cent mycelial growth inhibition (76.47%) was recorded in tricyclazole 18% + mancozeb 62% at 500 ppm concentration.