Fig. 1. Symptoms of Phytophthora root rot on soybean seedlings: (A) light discolor- ation of the tap root and rootlets, with a water-soaked lesion on the stem; (B) brown to dark brown discoloration of the tap root and rootlets, with a chocolate-colored lesion on the stem; (C1-C3) hypocotyl and cotyledon damage; and (D) seed rot.