Figure 1: Photographs of dual culture tests and scanning electron microscopybetween T. reesei (TU-6), T. reesei (gna1QL) and T. reesei (Δgna1) and P.ultimum. T=Trichoderma; P=P. ultimum; Bar=10 μm. Arrows show the contactbetween T and P. Arrowheads indicate the holes caused by interaction betweenT and P. SEM analysis was carried out at 1,800X.