Solanum commersonii, S. chacoense, S. caldasii var.glabrescens, S. jamesii, and an unnamed variety have been grown in soil heavily infested withActinomyces scabies, the organism of common scab, and for two successive years have given an immune reaction. All of the species mentioned have some very objectionable characters including late maturity, long stolons and in those of the groupcommersonia a bitter flavor. Interspecific hybrids have been obtained. The usefulness of the species in a program of breeding for the development of scab-resistant sorts of commercial value remains to be determined.