Integrated management of sheath blight disease of rice with Trichoderma harzianum and chemicals

摘要

T. harzianum was used against Rhizoctonia solani, the causal pathogen of sheath blight disease of rice, as seed treatment both alone, and with different media (methyl cellulose, gur (sugars) and gum) or thiram in pot experiments. In vitro, a higherpercentage of seed germination was obtained when a food base medium was incorporated with the antagonist than when it was used alone. In the pot test, lower disease incidence was observed in the T. harzianum + methyl cellulose, followed by the T. harzianum + sugars treatment. Sublethal dose (0.05%) of thiram with the antagonist showed lower disease incidence than treatment with its lethal dose (0.3%) alone.