rose rust fungus (phragmidium mucronatum). common plant pathogen.

yellow leaf flower insect invertebrate plant nature animal produce food autumn petal wildlife green tree wildflower soil rose rust fungus phragmidium mucronatum common pathogen evident bright orange pustules budding stalk dog diplocarpon rosae spots chlorosis pathology protection diseased dyeing horticulture mould disease necrosis microorganism mucronatum healthy spot spider flora branch rosaceae garden plant green leaf rose pathogen nature leaves rust fungal tuberculatum macro gardening closeup pustules background spores flower phytopathology fungus infection fungicide phragmidium pest rosa fungi