disease of flower hydrangea hortensia due to lack of wtaer and pollution close up

acarid armillaria badly brown bush cercospora chlorosis chlorotic close closeup cutout damage deformation deformed detail disease diseased dry fade flower folliage fungal fungi fungus gardening hortensia hydrangea ill illness insect lack leaf lesion mealybug mellea mite nature parasite pathogen pink plant problem pulvinaria scale shrub spot virus water withered