Abstracto
- In October 2018, soybean (Glycine max L.) plants displaying elongated black to reddish-brown lesions on stems were observed in a field planted to the cultivar BRS Serena in the locality of Puerto López (Meta, Colombia), with 20% incidence of diseased plants. Symptomatic stems were collected from five plants, and small pieces mm ) were surface sterilized, plated on potato dextrose agar (PDA), and incubated for 2 weeks at 250C in dark- ness. Three fungal isolates with similar morphology were obtained (i.e., by subculturing single hyphal tips), and their colonies on PDA were grayish-white, fluffy, with aerial mycelium, dark colored substrate mycelium, and pro- duced circular black stroma. Noninoculated control plants werv asymptomatic. Fungal cultures recovered from symptomatic stems were morphologically identical to the original isolates. This is the first report of soybean stem canker caused by D.ueckerae in Colombia. Due to the economic importance of this disease elsewhere.
