Psychrotolerant Strains of the Genus from Bottom Sediments of Lake Baikal as Promising Biopesticides’ Producers

Among 54 psychrotolerant strains of 16 species of the genus isolated from the bottom grounds of Lake Baikal 12 strains were selected during sequential screening on solid and liquid media. Finally, 6 strains of the species and sp. were selected. They exhibited inhibitory action towards test-microorganisms INA 00760, ATCC6633, ATCC2091 or ATCC25922 as well as towards strains of phytopathogens VKM-B1247 and VKPM F-148. Maximum antibiotic activity was established for the culture fluid (CF) and CF concentrate of Trichoderma sp. 2d-4B strain during submerged cultivation against Pectobacterium carotovorum VKM-B1247 and Fusarium oxysporum VKPM F-148. Based on the data of the effective suppression of these phytopathogens and on an assessment of the effect of this strain on the germination of seeds of the monocotyledonous plant and the dicotyledonous plant and on the length of their sprouts it was shown that the strain sp. 2d-4B can be used to create a biopreparation.