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Has Nicholas Marshall left Dobbies?
Scotts appoint Mark Portman as UK & Ireland General Manager as it's confirmed that Sheila Hill has left the company
Pennells acquires Four Seasons Garden Centre
Snow wreaks havoc for garden centre stores
Langlands donates food to Hull homeless
Staff take up curling at North Walsham, Bobsleigh at Lakeside Plant Centre and get Reindeer pulling sleighs at Richardsons Garden Centre
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Plant sales slow ahead of Big Freeze
New additions to successful GroZone range
Greenfingers and HTA collaborate on gifting initiatives
New look website for National Children’s Gardening Week
RHS ranking reveals pests and diseases rife in UK gardens
Tong's Orchid advice and MOT day hailed a success
Plant Show success for Klondyke
Snowy success for Garden Press Event
New HTA Chairman and Matthew Bent on BBC Radio 4 Consumer programme
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David Domoney teams up with Kent & Stowe
Preparing for the Big Freeze
Young veg plants and herbs start to sell through but onion sets dominate
Will growing media momentum continue?
Wild Bird Care sales down by 30% but set to grow
Keukenhof - Meteorological spring has started
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RHS ranking reveals pests and diseases rife in UK gardens
  • Annual ranking reveals most troublesome pests and diseases in 2017
  • Honey fungus ranked number one disease for 22nd year with box suffering three top ten plant health issues
  • Fuchsia gall mite and diseases of edible crops expected to take hold in 2018

Honey fungus and box tree caterpillar were the dominant plant health issues in 2017, according to analysis of Royal Horticultural Society gardener enquiries.

Now in its 22nd year, the annual ranking is a guide to new and growing areas of concern for gardeners and includes a number of pests and diseases first identified by the RHS, such as kerria twig and leaf blight that features in the top ten for the first time this year.

In 2017, box tree caterpillar returned to the number one spot after dropping to number seven in 2016. Increasingly common in London and the home counties the caterpillar feeds on the leaves of box from within a protective webbing causing severe defoliation.

In what was a bad year for the plant, it also battled box blight and volutella blight – both of which cause twig and leaf death. While the box tree caterpillar is expected to continue its spread, the issue of blight may be decreased by growing gardener awareness of how to manage it and breeding of resistant varieties.

Honey fungus has retained the disease top spot for the 22nd year running, which can be attributed to its numerous and diverse host range that includes popular garden plants such as the rose, rhododendron and Prunus. RHS research currently underway is intended to help gardeners better manage the disease that attacks and kills the roots of perennial plants before decaying the wood.

Pests and diseases to watch in 2018 include fuchsia gall mite which makes its fourth and highest appearance in the top ten having first been discovered in the UK in 2007. Reported for the first time in South Wales and Cheshire in 2017, the microscopic mites cause the shoots and flowers of fuchsias to distort.

Changing weather conditions, the withdrawal of fungicides and the use of highly susceptible cultivars, is also expected to see a rise in the number of diseases of edible crops such as apple and pear scab that causes dark, scabby markings on fruit and pear rust that causes bright orange spots on leaves.



More information about the top ten pests and diseases is available on the RHS website:

Gerard Clover, Head of Plant Health at the Royal Horticultural Society, said: “This year’s pest and disease ranking points to the continuing problems inflicted on gardens by old foes like honey fungus but also new and emerging threats like box tree caterpillar, fuchsia gall mite and kerria twig and leaf blight. With new pests and diseases emerging in continental Europe, it has never been more important that people get to grips with what is going on in their gardens.”

To help mitigate the risk posed by pests and diseases, the RHS is adopting six new principles that will guide its activity across gardens, shows and plant centres and hiring three new senior staff who will oversee plant health issues. This includes Xylella fastidiosa which the RHS has labelled a ‘game changer’ for gardeners and the horticultural industry.

More information is available at


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