First Report of Diaporthe goulteri on Soybean in Germany

<i>Diaporthe</i> (anamorph: <i>Phomopsis</i>) species are endophytes or fungal pathogens for many different plant species. Soybean (<i>Glycine max</i>) can be infected by many different <i>Diaporthe</i> species; among them, <i>D. caulivora</i> and <i>D. longicolla</i> are responsible for the most significant damages. <i>Diaporthe goulteri</i> is a species that was only recently described and has so far been found on sunflower (<i>Helianthus annuus</i>) in Australia and an unknown host in Thailand. Here, we report isolation of <i>D. goulteri</i> from soybean in southern Germany, molecular species identification, and additional morphological description. We also show that <i>D. goulteri</i> can infect soybean and describe the symptoms we observed, both on the plant where the isolate came from and following artificial inoculation.