Actinomycetes, including the largest group Streptomyces genus, have practical importance as producers of biologically active substances used in medicine, veterinary, plant breeding and plant protection (antibiotics, vitamins, enzymes, lipids, amino acids, etc.). In the recent years, the National Collection of Nonpathogenic Microorganisms of Academy of Sciences of R. Moldova was enriched with new strains of streptomycetes, isolated from soils of different regions of R. Moldova, which were

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... for their morphological and cultural characteristics, ability to synthesize exametabolites that stimulate plant growth and antagonistic activities against plant pests and pathogens. From cernoziom soils from the central part of R. Moldova 236 strains of streptomycetes were isolated and some of them were able to improve seed germination or other morphological or productive characteristics of tomato, tobacco, sugar beet and soybean plants and to completely inhibit growth of phytopathogenic fungi such as Alternaria