pear leaves with gymnosporangium sabinae is a species of rust fungus in the subdivision pucciniomycotina. known as pear

nature rusty infection disease plant agriculture fungus garden leaf tree green growth natural gardening foliage closeup flora outdoor leaves red spot botany orange infestation sabinae diseased fungicide danger fungal pathology parasite pathogen infected problem pear branch macro background rust sick phytopathology environment yellow farming prevention