Production of Antibiotics by Species of Myrothecium

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Abstract
The mold previously known as Metarrhizium glutino-sum Pope has recently been shown to be identical with the well-established species Myrothecium verrucaria (Alb. & Schw.) Ditm. ex Fr. A strain of "Metarrhizium glutinosum," previously shown to produce 2 biologically active substances, one highly fungistatic (glutinosin) and the other causing sever dermatitis, has been compared with several strains of Myrothecium verrucaria, M. roridum and M. inundatum. The strains of M. verrucaria and M. roridum behaved similarly, all producing a fungistatic substance (not yet shown to be chemically identical with glutinosin), and all except one strain of M. roridum producing the dermatitic substance. This result emphasizes the very close relationship between M. roridum and M. verrucaria. A single strain of M. inundatum examined did not produce either the fungistatic or the dermatitic substance.

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