[Antibiotic activity of some fungi].

Biological activity of pure extracts of cultural filtrates of Aspergillus niveus 2411, Myrothecium cinctum 910, Ulocladium consortiale 960, Penicillium sp. 10-51 concerning wide spectrum of test-organisms was investigated. It was shown that the extracts had high levels of antibacterial activity against Gram-positive microorganisms, especially against Bacillus genus.

[Characteristics of toxigenic properties of Myrothecium cinctum (Corda) sacc., 1886 and Myrothecium commune pidopl., 1969].

The comparative study of toxigenic potential of Myrothecium cinctum (12 strains) and Myrothecium commune (7 strains) was conducted. The ability to produce the complex of macrocyclic trichothecenes (MCTC) presented in ethanol soluble fraction (ESF), as well as fungistatic activity against yeasts test-cultures (strains Saccharomyces vini "Feodosia" and Candida stellatoidea 62) and rabbit skin test were evaluated. It was established that ESF output varied within wide limits in all studied strains of both species but it was significantly lower in M.

[Biological activity of Penicillium sp. 10-51 exometabolites].

Silica gel column chromatography (silica gel "L" II kind of activity 100/160 mkm) of the chloroform extract from the cultural filtrate of Penicillium sp. 10-51 gave two fractions (chloroform and chloroform-acetone, 5:1) having biological activity. Recrystallization yielded two compounds.

[Herbicide activity of some micromycetes].

Screening of phytotoxic properties of 5 micromycete strains were made concerning cultivated plants and weeds. All of the strains show phytotoxic activity of different levels. In particular, the cultural filtrates of Penicillium sp.

[Evaluation of micromycetes potential concerning synthesis of biologically active substances].

Screening of 41 cultures of some researched strains of micromycetes by their antibiotic and phytotoxic activities in relation to different test-organisms--Gram-positive, Gram-negative, phytopathogenic bacteria, yeasts and green algae was conducted. The wide spectrum of antibiotic action was characterized for the cultures of Gliocladium catenulatum 2709, 3942 Penicillium vulpinum 3957, Ulocladium atrum 1889, U.consortiale 960, Trithirachium album 2673.