Rhododendron fortunei · Shrub
Vine weevil: Apply nematodes to moist soil in autumn or use biological controls like Steinernema carpocapsae.
Powdery mildew: Improve air circulation and apply a suitable fungicide if infection is severe.
Rhododendron bud blight: Remove affected buds and avoid wetting foliage when watering to reduce fungal spread.
Pieris lacebug: Encourage natural predators like ladybirds or use insecticidal soap for heavy infestations.
Scale insects: Scrape off scales manually or treat with horticultural oil during the dormant season.