Cedar-apple rust

Symptoms

On junipers such as eastern redcedar, round brown woody galls swell in wet spring weather and push out bright orange, gelatinous, horn-like tendrils; on the apple or crabapple host, yellow-orange spots appear on leaves and fruit.

Plants affected

• Eastern redcedar

Common questions

How do I recognise Cedar-apple rust on Eastern redcedar?

On junipers such as eastern redcedar, round brown woody galls swell in wet spring weather and push out bright orange, gelatinous, horn-like tendrils; on the apple or crabapple host, yellow-orange spots appear on leaves and fruit.

Do I have to report Cedar-apple rust?

No. Cedar-apple rust is not a notifiable organism, so there is nothing to report to an authority. Treat it as a normal garden problem.

How is Cedar-apple rust treated?

Mainly with biological and cultural measures — removing affected material, changing the conditions that favour it, and treating with agents approved in your country. The exact steps and their timing depend on the plant, the season and where you live: Dr. Phyto works them out in a free diagnosis.