Scientists in Peru discovered that a fungus called Fusarium suttonianum is causing root rot disease in sacha inchi plants, an important crop known for its omega-3 rich seeds. Using both traditional microscopy and modern DNA testing, researchers confirmed this fungus as the culprit and demonstrated it can cause the same disease symptoms in healthy plants. This discovery is important for farmers because it provides the first scientific identification of this disease threat in Peru, enabling the development of better disease prevention and control strategies.