RHS Names Top Ten Pests of 2013

Friday 14 February 2014

Slug and snail enquiries match 2012 high

The Royal Horticultural Society (RHS) has announced its ‘Top Ten’ garden pests for 2013 based on enquiries received by the charity’s entomologists. As in 2012, slugs and snails topped the list with enquiries remaining at their highest since 2002.

Exceptional levels of rainfall in 2012 that produced one of the wettest summers on record created the perfect mild, damp conditions for slugs and snails to thrive; this appears to have ensured their traditional dominance of the list continued into 2013.

Damage from slugs and snails mainly occurs during spring to autumn, affecting seedlings and many ornamental plants and vegetables, especially potato tubers, hosta leaves and narcissus flowers.
While slugs and snails continued to frustrate gardeners, perhaps the biggest surprise of the 2013 list was the appearance of plum moths (8th) which had never before featured among the top ten garden pests. The small, pink caterpillars of the plum moth feed inside the ripening fruits of plums, damsons and greengages.

Mice and voles (4th) also saw a sharp increase in enquiries with numbers hitting a 24-year high. These small rodents pose a number of challenges to gardeners, for while the tunnelling activities of voles can disturb the roots of plants and disfigure lawns, they also gnaw the bark from the roots and stems of tree and shrubs. Mice can be a problem in storage areas, and in the garden they take fruit and chew off seedlings. Peaks and troughs in mice and vole populations are thought to be due to changing food supplies and the prevalence of predation and diseases.

Vine weevil is a top five enquiry in most years and 2013 was no exception, with the pest occupying the number two spot. Vine weevil is one of the few garden pests capable of killing plants; while the adults cause superficial damage by eating notches in the leaf margins of a wide range of herbaceous plants, it is the larvae feeding on plant roots, especially those grown in pots or containers, that prove terminal for plants.

Others pests which increased in the number of enquiries were capsid bugs (3rd) – in 2013 enquiries reached the highest level for 25 years. Capsid bugs are highly destructive pests that suck sap from the shoot tips and flower buds of a wide range of herbaceous plants including hydrangea, fuchsia and rosa.
Other top ten pests included cushion scale (5th), glasshouse red (two spotted) spider mite (6th), mealybug (7th), ants (=9th) and lily beetle (=9th).

RHS Senior Entomologist Andrew Salisbury said, “By identifying and understanding the pests that are damaging garden plants the RHS can really focus its scientific expertise to deliver relevant, world-leading advice to all garden lovers.”
Further information on controlling garden pests is available on the RHS website www.rhs.org.uk


Notes to editors

For more information please contact Erin O’Connor or Garfield Myrie on 020 7821 3364/3060 or erinoconnor@rhs.org.uk/garfieldmyrie@rhs.org.uk  
Images of the Top 10 Pests are available to download at www.photoshelter.com - please email the RHS Press Office at showspr@rhs.org.uk for instructions on how to create an account.

About the RHS
The Royal Horticultural Society was founded in 1804 by Sir Joseph Banks and John Wedgwood for the encouragement and improvement of the science, art and practice of horticulture. We held our first flower shows in 1820, were granted a Royal Charter in 1861 and acquired RHS Garden Wisley in 1903. From our first meetings in a small room off London’s Piccadilly, we have grown to become the world’s largest gardening charity.

Today the RHS is committed to providing a voice for all gardeners. We are driven by a simple love of plants and a belief that gardeners make the world a better place. 209 years on we continue to safeguard and advance the science, art and practice of horticulture, creating displays that inspire people to garden. In all aspects of our work we help gardeners develop by sharing our knowledge of plants, gardens and the environment.

RHS membership is for anyone with an interest in gardening. Support the RHS and secure a healthy future for gardening. For more information call: 0845 130 4646, or visit www.rhs.org.uk/join  

RHS Registered Charity No. 222879/SC038262



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About the RHS

The RHS believes that gardening improves the quality of life and that everyone should have access to great garden experiences. As a charity we help to bring gardening into people's lives and support gardeners of all levels and abilities; whether they are expert horticulturists or children who are planting seeds for the very first time.

RHS membership is for anyone with an interest in gardening. Support the RHS and secure a healthy future for gardening. For more information call: 0845 130 4646, or visit www.rhs.org.uk

RHS Registered Charity No. 222879/SC038262