Rhododendron rex · Tree
Powdery mildew: Tolerate unless severe; improve air circulation and avoid overhead watering to reduce humidity.
Bud blast: Remove and destroy infected buds promptly if practical; encourage natural enemies of leafhoppers.
Vine weevil: Use nematode treatments in the soil during warm weather or apply biological controls like Steinernema carpocapsae.
Rhododendron leafhopper: Monitor for activity; encourage natural predators and remove heavily infested foliage if necessary.
Pieris lacebug: Encourage predatory insects like ladybirds; severe cases may require targeted insecticidal soap application.