Q What is pear rust?

A Pear rust is a fungal disease that attacks pears and junipers.

Caption: The distinctive spots appear in spring and enlarge over summer and autumn

Q How do I recognise pear rust?

A Red or orange spots, which are 1-2mm in diameter, develop on the upper surface of infected leaves in spring, enlarging as the season progresses through summer into autumn. Later, raised and almost horn-like spore-bearing projections appear on the lower leaf surface as the fungus really gets hold. Occasionally, cankers will develop, too. Junipers may develop similar outgrowths.

Q How do I prevent pear rust occurring?

A Pear rust fungus requires a juniper to complete its life cycle. You can prevent further infections occurring by regularly checking pear and juniper plants growing nearby, and pruning out any affected areas. Picking off infected leaves promptly will also help to limit the spread of the fungus.

Caption: Pear rust needs juniper to complete its life cycle.

Q How can I help affected plants with pear rust?

A There are no chemicals available to control it. As well as getting rid of infected stems and leaves as, keep the tree fed (but not overfed), mulched and watered to help encourage plenty of new growth.