Aquilega downy mildew hits national collection holder's plants

Plant Heritage Collection holder Carrie Thomas of Touchwood Plants who holds the National Plant Collections of Aquilega is warning gardeners about downy mildew ravaging her collection.

She said because there was no published information about downy mildew of Aquilegia, she has compiled known information onto her website to warn gardeners and help them prevent, identify and cope with infections. 

Thomas said: "What is needed is early discovery and measures to control spread once it is found. It is my hope that these informative pages will help early identification, and hence slow or minimise spread. This new disease, downy mildew of Aquilegia is a very virulent disease and it is killing plants.

"The Touchwood National Plant Collections of Aquilegia have been affected and may not last into the 2015 flowering season."

Nigel Stringer (volunteer at National Botanic Garden of Wales) and the RHS Members' Advisory Service identified the pathogen for her.

Thomas said: "I now see that I had some infected plants at least one year earlier, but had no reason to believe that a sickly-looking Aquilegia plant had a virulent infection of any sort, let alone one likely to lead to the death of the plant after efficiently infecting other plants around it, as well as creating the long term issue of resistant, infective spores in the soil."

"However a kindly blind eye was the worst thing I could have done with downy mildew. I do not know if my collections will survive. I do not know if I will ever be able to easily grow aquilegias in this soil again."

Thomas is urging gardeners to email her if they have any signs of the disease so that she can build an accurate picture on her website of where it is found in the UK and worldwide. It is also important to know what treatment methods have failed, which have seemed to work, and why. Immediate removal of any plant even suspected of having the disease, may be the only effective solution. 

Visit her webpages to find out what signs to look out for: http://www.touchwoodplants.co.uk/aquilegia-downy-mildew.htm


Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Before commenting please read our rules for commenting on articles.

If you see a comment you find offensive, you can flag it as inappropriate. In the top right-hand corner of an individual comment, you will see 'flag as inappropriate'. Clicking this prompts us to review the comment. For further information see our rules for commenting on articles.

comments powered by Disqus

Read These Next

Pest & Disease Factsheet - Mealybugs

Pest & Disease Factsheet - Mealybugs

Vines, tomatoes and tropical plants are among those at risk.

Pest & Disease Factsheet - Bacterial and fungal canker

Pest & Disease Factsheet - Bacterial and fungal canker

A wide range of nursery stock can be susceptible to potential damage from various cankers.

Pest & Disease Factsheet - Spider mites

Pest & Disease Factsheet - Spider mites

Defences for protected and outdoor ornamentals.