In vitro study of Fungicides in controlling Helminthosporium oryzae causal organism of Leaf brown Spot of Rice

摘要

Leaf brown spot is a serious disease of rice causing considerable yield losses. Among various control measures the uses of chemical fungicides have been found highly effective. In vitro studies were carried out to evaluate the efficacy of fungicides in inhibiting the mycelial growth of H. oryzae pathogen causal organism of leaf brown spot of rice. All the fungicidal formulations at various concentrations were found significant in reducing the radial growth of the fungus. Among the tested fungicide Bavistin @ 1500 ppm was found significantly effective in inhibiting the radial growth of mycelium and second best treatment was Hinosan that was found at par with each other at the same concentration after 144 hrs of incubation.