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Paper Details

Screening of fungal biocontrol agents against Sclerotium oryzae the causal agent of stem rot of rice

NISHANT PRAKASH AND SMITA PURI*

Journal Title:International Journal of Agricultural Sciences
Abstract


Scleortium oryzae causes rice stem rot disease which is an important disease of rice. In an effort to develop eco-friendly measures for the control of this disease different Trichoderma harzianum and T. virens isolates were screened. Variability in all the 15 isolates of Trichoderma spp. was tested against Sclerotium oryzae through monoculture. Results of monoculture showed variability amongst the isolates tested. All the isolates of Trichoderma spp. produced volatile compounds and maximum inhibition of the mycelial growth of Sclerotium oryzae (28.88%) was recorded by Trichoderma sp. (isolate no. 4). Cultural filtrate of all the four isolates of Trichoderma spp. resulted in the maximum inhibition of (94.44%) mycelial growth of Sclerotium oryzae when used at 50 per cent concentration. At 25 per cent concentration of cultural filtrate, maximum inhibition of mycelial growth (94.44) was observed in case of Trichoderma isolate 1 and 2. Glass house experiments showed that all the Trichoderma isolates tested were helpful in disease control and plant growth promotion both.

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