Validamycin-containing bactericidal composition and application thereof

The invention provides a validamycin-containing bactericidal composition and application thereof and belongs to the technical field of agricultural biological control. The bactericidal composition isprepared from validamycin and trichoderma harzianum, wherein the viable count of the trichoderma harzianum is 15 to 25 billions cfu/g, and the weight ratio of the validamycin to the trichoderma harzianum is (20:1)-(1:20). The bactericidal composition provided by the invention is applied to prevention and treatment of the rice sheath blight disease; when the weight ratio of the validamycin to the trichoderma harzianum is 3:1, the 7d control effect of the bactericidal composition on the rice sheath blight disease is 94.6%, the 14d control effect of the bactericidal composition on the rice sheathblight disease is 90.8%, and the 30d control effect of the bactericidal composition on the rice sheath blight disease is 86.7%; and the bactericidal composition is low in toxicity, high in control effect and long in lasting p