Fig. 2. Optical microscope and scanning electron micrographs of the hyphae of S. sclerotiorum grown on PDA medium with DMSO or compounds 2, 5c at 25 °C. Optical microscope: (A) untreated control, 0.5% DMSO, ×400; (B) compound 2 at 0.0016 mM (EC₅₀) treatment, ×400; (C) compound 5c at 0.0030 mM (EC₅₀) treatment, ×400; scanning electron microscopy: (D) untreated control, 0.5% DMSO, ×1500; (E) after 72 h compound 2 at 0.0016 mM (EC₅₀) treatment, ×1500; (F) after 72 h compound 5c at 0.0030 mM (EC₅₀) treatment, ×1500.