Fungal disease
Rust fungus
How to recognise it
Orange-brown pustules, usually under the leaves.
What helps
Remove affected leaves early, clear fallen leaves in autumn, keep foliage dry. Pear rust needs juniper as alternate host.
Often a care issue is behind it (watering, light, placement) – the care check in the app helps narrow it down.
Not sure it's this?
LeafChecker compares your photo with every disease and pest on our list and tells you honestly how sure it is. No sign-up, no subscription.
Check a photo – freeTypical organisms: Puccinia graminis, Puccinia malvacearum, Phragmidium mucronatum, Gymnosporangium sabinae, Puccinia horiana, Melampsora populnea, Puccinia allii, Puccinia coronata, Uromyces appendiculatus