Pear rust

Bright orange spots on top of the leaves, with small brown outgrowths underneath: a rust fungus that overwinters on nearby junipers.

How to recognise

• Look under the orange spots: small raised brown structures confirm rust.
• Check for junipers nearby: they host the fungus from year to year.

What to do

• Remove badly affected leaves and gather fallen ones.
• Remove or prune nearby junipers bearing orange gelatinous galls in spring.

Prevent

• Open the canopy with light pruning; good airflow limits the disease.

Trees affected