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

Fig. 5C. Onion seed assayed for Botrytis spp. on Kritzman’s agar (22). (C, shown here) Fast-growing, flat, white, fan-shaped or ‘ropy’ mycelium of B. porri that sporulates sparsely and also darkens Kritzman’s agar as a result of PPO activity.



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