National Agricultural Pest Information System
USDA-ARS/Systematic Mycology & Microbiology Laboratory
Blue Stain Fungus
Blue Stain Fungus (Ophiostoma longicollum) is a fungal pathogen. It is a native of Japan.
Oak mortality is reported to be occurring in at least two species of Quercus over a wide area of Japan but detailed information on the distribution or pathology of this fungus is not available. .