Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
See what events are on near you and browse your bookmarked pages.
Raspberry spur blight is a fungal disease of raspberries causing purple patches on canes. It rarely kills raspberries, but can reduce yield severely by weakening the canes and killing buds.
Spur blight is a disease of raspberries caused by the fungus Didymella applanata. It appears from late summer and persists on infected canes until the following year.
It mainly affects raspberries and occasionally loganberries. It is particularly common during wet seasons.
You may see the following symptoms:
No fungicides are available to home gardeners for the control of raspberry spur blight.
Didymella applanata produces two spore types. The first type starts the infection on the new canes in the spring, while the second causes further spread during the summer. Infection usually occurs via the leaf stalks or buds, and is favoured by wet weather.
Overcrowded canes, and those that have received too much nitrogen, are more prone to attack.
RaspberryRaspberry beetleRaspberry cane blightRaspberry leaf and bud miteRaspberry rustRaspberry virusesSpotted wing drosophila
the RHS today and get 12 months for the price of 9
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
Register for the site or sign in to share your experiences on this topic and seek advice from our community of gardeners.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
Join the RHS today and get 12 months for the price of 9