Molecular Phylogenetic Analyses of Verticillium fungicola and Related Species Causing Dry Bubble Disease of the Cultivated Button Mushroom, Agaricus bisporus.

ABSTRACT Molecular phylogenetic analyses were performed on 40 isolates of Verticillium fungicola collected from various Pennsylvania mushroom farms in 1999 and 28 isolates of Verticillium spp. collected during the last 50 years from various geographic locations. Sequence analysis of internal transcribed spacers 1 and 2 (ITS1 and ITS2) and 5.