Biocontrol of helminthosporium oryzae with Trichoderma sp. Suryawanshi B. G., Rane V. I. Jagat Arts, Commerce, and Indiraben Hariharbhai Patel Science College, Goregaon, Dist. Gondia (M.S.) 441801 Online published on 17 October, 2020. Abstract The present study is carried out on the phyllosphere mycoflora of rice, in Vidarbha, Maharashtra, India. A total of 64 species representing 32 genera of fungi were isolated. Among the isolated species, there were 11 Phycomycetes, 4 Ascomycetes, 43 Deuteromycetes, and 3 sterile mycelia. Out of these, Helminthosporium oryzae Breda de Hann; Syn. Bipolaris oryzae (Breda de Hann.) Shoemakar, causes brown leaf spot disease on rice. This pathogenic fungus is controlled by a non-pathogenic fungus, Trichoderma under in vitro conditions. Three native species of Trichoderma were isolated and tested for antagonistic activity against H. oryzae. Inhibition percentage in radial mycelial growth of H. oryzae was observed to the extent of 93 to 100 % against the Trichoderma species. Top Keywords Rice, Trichoderma, Antagonistic activity, Helminthosporium oryzae, Brown leaf spots. Top |