Optical micrographs of the inhibition of fungal growth by N43 in a dual culture at 24 and 48 h. (A) The control culture with only R. solani Q1 (24 h). (B) R. solani Q1 mycelium from the edge of the inhibitory halo (24 h). (C) The control culture with only R. solani Q1 (48 h). (D) R. solani mycelium from the edge of the inhibitory halo (48 h). Dark arrows indicate hyphal deformation.