First report of Pithomyces chartarum causing a leaf blight of Miscanthus x giganteus in Kentucky.

摘要

In August 2009, a newly established and a 2-year-old M. giganteus field research trial near Lexington, Kentucky, USA, were found to have 100% incidence of severe leaf blight. Brown, mosaic-like, coalesced necrotic lesions covered leaf blades and sheaths on every stand, ultimately killing some leaves and tillers. The disease was more destructive in the newly established trial where 4- to 5-month-old tillers were killed. No fruiting bodies were found immediately on diseased leaves. The causal agent was identified as P. chartarum based on morphological and molecular analyses conducted on the isolates. This is thought to be the first report of P. chartarum causing a disease on Miscanthus.