Primula kewensis · Perennial
Primula brown core: Remove and destroy infected leaves immediately and ensure good air circulation to prevent spread.
Powdery mildew: Improve ventilation and avoid wetting foliage when watering; remove severely affected parts.
Primula rust: Remove infected leaves as soon as symptoms are seen to reduce spore load and reinfection.
Slugs and snails: Use physical barriers like copper tape or grit, and hand-pick pests at night.
Vine weevil: Apply biological nematodes to the soil in autumn and spring to control larvae.