However, the results related to third year showed that all treatments containing antagonistic isolates decreased disease severity percent and increased yield significantly, compared to unhealthy control. In spite of a significant difference among antagonistic treatments, in terms of disease severity percent and yield, in first and second years, these treatments were not different significantly in third year. It could be presumed that due to the residues of T. flavus bioformulations related to previous years in soil, the population of the above-mentioned antagonistic fungus has been improved using antagonistic treatments containing T. flavus in these treatments; consequently there was no significant difference among these treatments in terms of measured parameters.