Effects of fluorescent Pseudomonas spp. isolated from mushroom cultures on Lecanicillium fungicola

► Bacterial strains were isolated from mushroom cultures. ► Pseudomonas spp. were dominant and screened for in vitro antagonism of L. fungicola. ► In vitro, L. fungicola is sensitive to competition for iron and antibiosis. ► None of the antagonistic strains effectively controlled dry bubble disease. ► The insensitivity of dry bubble disease to biological antagonism is discussed.