Effect of soil pH and media on the antagonism of Aspergillus terreus to the rice sheath blight fungus
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Authors
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ROBIN GOGOI and A.K. ROY *
Department of Plant Pathology, Assam Agricultural University, Jorhat 785 013
Keywords:
Aspergillus terreus, Thanatephorus cucumeris, antagonism, sheath blight, rice, soil pHAbstract
A. terreus reduced the incidence of sheath blight caused by Rhizoctonia solani on rice cv. IR 50 plants grown in pots in the autumn and winter seasons in Assam, India. Disease suppression was highest when A. terreus was grown on wheat-bran peat medium than on maize-meal sand medium and was also higher when soil pH was 7.20 or 7.28 than when pH was 5.2 or 5.5. Spraying with a spore suspension of A. terreus simultaneously or 3 d before inoculation with R. solani on aerial parts of rice, suppressed disease incidence. R. solani was also suppressed by spore suspension of A. terreus in vitro.
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