Scientists in China discovered that a fungus called Colletotrichum tofieldiae causes a disease called anthracnose in perennial vetch (Vicia unijuga), an important forage crop used for animal feed. When plants get infected with this fungus, they become weak, their ability to photosynthesize decreases, and the nutritional quality of the plant drops significantly, reducing its value as animal feed. The fungus can also infect other legume crops like alfalfa and clover, showing it has a broad range of potential host plants.