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Not AvailableFusarium wilt of tomato (Solanum lycopersicum Mill.) caused by Fusarium oxysporum f. sp. lycopersici (Sacc.) W. C. Snyder and H. N. Hans (Fol.), is most serious and versatile pathogen. Chemical control of disease is not satisfactory and biological control is an attractive and potential alternative to the use of chemicals to control fusarium wilt of tomato. No any bioagent is universally effective everywhere therefore, search for potential biocontrol agent is continuous process and mandatory for several and individual ecological niches. In this experiment biocontrol efficacy of five species of Aspergillus and five species of Trichoderma were evaluated in vitro against Fusarium oxysporum f. sp. lycopersici. In both the experiments (dual culture and culture filtrates) T. harzianum was found to be highly effective against the isolates of Fol. followed by A. niger biocontrol potential of A. terreus is least among all the isolates …Not Availabl