First report of Neonectria neomacrospora on Abies concolor in Finland.
In February 2018, Abies concolor (white fir) trees with shoot dieback were detected in an arboretum located in southeast Finland. Closer examination of the diseased firs revealed bleeding stems, branch cankers and necrotic shoots with shedding needles. Under the microscope red perithecia were observed in the needle scars of dying shoots. In the arboretum, deterioration and poor survival of white fir had been noticed since the 1980's with more than 90% of firs of various ages showing decline symptoms. The causal pathogen was isolated and identified as Neonectria neomacrospora based on morphological and molecular analyses. The obtained sequences were deposited in GenBank as accession number MH580206 (ITS). This is thought to be the first report of N. neomacrospora on A. concolor in Finland.