Efficacy of Trichoderma longibrachiatum isolates against soil borne pathogens

Abstract

Genus Trichoderma contain many species that are of great economic importance because of ability to suppress pathogens and enhance their biocontrol capabilities against soil borne pathogen. Nine isolates of T. longibrachiatum were obtained from rhizosphere soil of different districts of Vidarbha region. There was variability in colony growth, colony colour, reverse pigmentation, conidial shape and size, phialides etc. T. longibrachiatum isolates were evaluated for antagonism using dual culture technique and all isolates were found significant in controlling per cent growth inhibition of soil borne pathogens S. rolfsii, R. bataticola and F. udum. Growth inhibition was also recorded due to volatile substance produced by the isolates. Among the isolates TL-4 (Buldhana) and TL-9 (Yeotma) were found more effective against tested soil borne pathogens.