Identifying and Distinguishing Seedling and Root Rot Diseases of Sugar Beets

Fig. 7. Characteristic macroscopic growth of A. cochlioides (left) and R. solani (right) growth in culture on PDA after 2 days. Infected seedlings were plated simultaneously.



Image from Plant Health Progress article:
Identifying and Distinguishing Seedling and Root Rot Diseases of Sugar Beets