2.4.2. Antifungal assays
2.4.2.1. Disk diffusion assays
For B. linens IC10 and B. subtilis methanol extracts, 50 μL of each crude extract was placed on sterile paper disks (Whatman paper #1; 0.7 cm diameter). A combined B. linens/B. subtilis extract treatment was used containing 25 μL of each crude extract on the same disk. 80% methanol served as the control. Following drying of the extracts, disks were placed on a PDA Petri dish. Plugs covered with B. cinerea or A. solani were then placed 4 (B. cinerea) or 2.5 cm (A. solani) from the paper disks. The plates were incubated for 72 h at 20 °C and the zone of inhibition on each plate was measured. The zone of inhibition was measured as the distance between the paper disk and edge of the fungal growth. The experiments consisted of randomized complete block designs with three replicates per treatment.