Title: IN VITRO COMPREHENSIVE ASSESSMENT OF ANTAGONISTIC ACTIVITY OF TRICHODERMA GENUS FUNGI AGAINST FUSARIUM SPP.
Abstract: As a result of researches from different substrates (peat, soil ground and mineral rock) new isolates of Trichoderma genus fungi were isolated with a wide variability of cultural and morphological features. Studying of new isolates and also collection Trichoderma genus fungus strains antagonistic activity has shown the presence of differently directed mechanism of antagonistic interaction in relation to phytopathogenic micromycetes F. semitectum, F. verticilliodes and F. solani. Inhibiting the linear pathogens growth on the 5-th day of coculture cultivation varied in relation to F. semitectum from 39% to 100%, F. verticilliodes – from 48% tо 100%, F. solani – frоm 45% tо 85%. The growth coefficient of Fusarium spp. phytopathogens in a co-culture with the studied antagonists is fallen significantly and depending on the antagonist isolate or strain can be decreased for more than 5 times. For a majority of studied Trichoderma fungi a presence of a mixed type of antagonistic activity fungistatic alimental (II type) and antibiotic (IV type) antagonism is determined. The comprehensive assessment of antagonistic activity has shown that the most active antagonist is a fungus Trichoderma sp. D-11, effectively inhibiting the linear growth of studied phytopathogens and rendering a high antagonism level by II and IV type what allows to substantiate the perspectiveness of its use as a basis of a preparation to control Fusarium genus phytopathogenic micromycetes for biological control of fusarium etiology diseases.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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