Rhododendron makinoi · Shrub
Vine weevil: Apply nematodes in autumn or use systemic insecticides on young plants.
Powdery mildew: Improve air circulation and apply a suitable fungicide if severe.
Rhododendron bud blast: Ensure well-drained soil and avoid waterlogging to reduce fungal risk.
Pieris lacebug: Prune out heavily infested shoots and apply horticultural oil in spring.
Scale insects: Scrape off small infestations or use systemic insecticides for larger outbreaks.