First report of Diplodia seriata causing stem canker on hybrid chestnut in Michigan
Chestnut industry (Castanea spp.) is growing in Michigan, US; however, growers are facing emerging issues affecting the health of trees in their orchards. In July of 2025, samples from young ‘Colossal’ hybrid chestnut trees (C. sativa × C. crenata) were submitted to Plant & Pest Diagnostics from Barry County, MI. The o...