PRO/PL> Halo blight, hop – USA: new pathogen (MI)

Other Plant Disease — United States
Michigan hop growers in 2018 approached Michigan State University [MSU] with concerns about a leaf blight they had never seen before. This was followed by reports of hop cones shattering during harvest and yield losses in fields with the affected leaves.
Scientists observed a fungus growing in the symptomatic leaves [and] the same on the cones. “The fungus was shown to infect and cause disease in healthy hop plants,” said MSU’s Doug Higgins. “Genetic testing showed that DNA from the fungal