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Effect of F. oxysporum VCs on the secretion of yellow pigment by T. harzianum. T. harzianum strain T-22 cultured on cellophane membrane overlaid on PDA was co-cultivated with 10 F. oxysporum strains and un-inoculated PDA (Control) for 33 h. After removing the cellophane membrane holding T-22 culture, plates were photographed (arranged based on the amount of pigment released).
