Magnolia campbellii · Tree
Powdery mildew: Improve air circulation and apply a systemic fungicide if severe.
Slugs and snails: Use iron phosphate pellets or beer traps around the base of the plant.
Vine weevil: Apply systemic insecticide drench to soil in early autumn.
Bud blast: Plant in a sheltered location away from late spring frosts.
Leaf scorch: Mulch well and water deeply during dry spells.