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A number of microbial products are used for ginseng cultivation.One product is used at soil preparation stage.It contains 27 microorganisms.Most products are of single microorganism, Bacillus subtilis to control root rot, leaf blight, Trichoderma hazianum to control gray mold, and B.subtilis to control root rot disease.Seven popular products have different effect to control Rhizoctonia solani.There was significant linear correlation (#)between percent protection and protection variation(figure 1).