Viburnum bodnantense · Shrub
Powdery mildew: Improve air circulation and apply a systemic fungicide if severe; resistant cultivars are available.
Vine weevil: Apply nematodes (Steinernema kraussei) to soil in autumn or use systemic insecticides.
Slugs and snails: Use iron phosphate pellets, copper tape barriers, or hand-pick at night.
Leaf spot: Remove affected leaves and avoid wetting foliage when watering to reduce humidity.
Scale insects: Scrape off small infestations or apply horticultural oil during the dormant season.