Detection and Identification of <i>Botrytis</i> Species Associated with Neck Rot, Scape Blight, and Umbel Blight of Onion

Fig. 7. Microscope photos (200x magnification) of conidia of each of six Botrytis species isolated from onion plants and grown on potato dextrose agar (PDA). Cultures were maintained for 7 to 14 days at ambient temperature (25 ± 3°C) with a 12-h/12-h day/night cycle (cool white fluorescent light), except for B. byssoidea and B. squamosa which were maintained at 15 ± 2°C under constant near-ultraviolet light for 7 days.



Image from Plant Health Progress article:
Detection and Identification of Botrytis Species Associated with Neck Rot, Scape Blight, and Umbel Blight of Onion