Rhododendron schlippenbachii · Shrub
Powdery mildew: Improve air circulation and avoid overhead watering; tolerate mild infections or apply fungicide if severe.
Bud blast: Remove and destroy infected buds promptly to prevent spread; ensure good drainage and hygiene.
Vine weevil: Use nematode treatments in autumn for larvae or apply systemic insecticides to control adults.
Silver leaf: Prune out infected branches well below the visible symptoms and destroy them immediately.
Pieris lacebug: Encourage natural predators like ladybirds or apply horticultural oil during dormant periods.