Isolation, Storage, Pathotype Characterization, and Evaluation of Resistance for <i>Phytophthora sojae</i> in Soybean

Fig. 4D. Soybean seedlings inoculated with P. sojae in the ‘tray test’. Seedlings are arranged on tray (A) and a small wound is made which is covered with a mycelial slurry (B). Lesions can be found 3 day after inoculation and measured. Secondary roots are removed from the plants (C) and the roots are cut open to expose the internal colonization (D, shown here).



Image from Plant Health Progress article:
Isolation, Storage, Pathotype Characterization, and Evaluation of Resistance for Phytophthora sojae in Soybean