Primula auricula · Perennial
Vine weevil: Repot into fresh compost annually and use biological nematodes or systemic controls if infestation is severe.
Aphids: Squash by hand, blast off with water, or use insecticidal soap; encourage natural predators like ladybirds.
Grey mould (Botrytis): Improve air circulation, avoid wetting foliage, and remove affected plant material promptly.
Primula leaf spot: Remove infected leaves immediately and maintain good garden hygiene to prevent spread.
Primula rust: Remove and destroy infected leaves as soon as symptoms are seen to reduce inoculum.