black tulip close up. the flower is affected by disease. fungal, mycelial, botrytis, mold, viruses. threat for tulips. discolored

affected agriculture background beautiful black blossom botrytis close concept dark dew discolored disease diseases drops dutch fire flora flower flowers fungal fungi garden gardens holland keukenhof macro mildew mold mycelial natural nature netherlands petal plant problem protection purple raindrops red rot season spots spring threat treatment tulip tulips virus viruses