Researchers discovered a serious fungal disease affecting buckwheat crops in China caused by Colletotrichum kahawae, a fungus that ranks among the world’s most damaging plant pathogens. Through laboratory tests, they identified the fungus and determined its optimal growth conditions and which other crops it can infect, including wheat, oats, potatoes, and maize. This is the first time this particular fungus has been reported on buckwheat, and the findings will help farmers develop strategies to prevent and manage the disease.