Evaluation of Soybean Germplasm for Resistance to <i>Phakopsora pachyrhizi</i>

Fig. 2. Scale used for the visual assessment of soybean rust in the preliminary evaluations of the germplasm in the USDA Soybean germplasm collection. 1 = no visible lesions, 2 = few scattered lesions present, 3 = moderate number of lesions on at least part of the leaf, 4 = abundant number of lesions on at least part of the leaf, and 5 = prolific lesion development over most of the leaf.



Image from Plant Health Progress article:
Evaluation of Soybean Germplasm for Resistance to Phakopsora pachyrhizi