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Rice sheath blight caused by Rhizoctonia solani is a kind of worldwide disease.It is also one of the three major diseases on rice production in our country.In the natural condition the main mycelium anastomosis groups of rice sheath blight are AG1-I A and AG-Bb.They have some differences in biological characteristics and morphology.At present jingangmycin and thifluzamide are commonly used for prevention and control of rice sheath blight.Thifluzamide belongs to thiazole-carboxamides and has good control effect to rice sheath blight.It can suppress succinate ubiquinone reductase on electron transporting respiratory chain of mitochondria.