sunlight shine through the green-yellow leaf of goat willow (salix caprea), close-up. the leaf disease

autumn background beauty black bright brown caprea caprearum closeup color colorful damage disease diseased diseases environment fall flora foliage fungal fungi fungus goat green hole infected infection invasive leaf leaves lesion melampsora nature necrosis necrotic orange outdoor pathogen pathogenic pathology phytopathology plant rusty salix shine spot spots subepidermal sunlight telia vivid willow yellow