Stock Photo - Ophiostoma ulmi is a parasitic fungus causative of Dutch elm disease. This photo was taken in Canon del Rio Lobos, Soria province, Castilla-Leon, Spain.

Stock Photo: Ophiostoma ulmi is a parasitic fungus causative of Dutch elm disease. This photo was taken in Canon del Rio Lobos, Soria province, Castilla-Leon, Spain.

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