Pest & Disease Factsheets
Factsheets with detailed information on how to recognise and deal with the the most common plant pests and diseases.
These larvae damage leaves on ornamental crops.
These two key groups can cause damage across a variety of ornamental crops.
Cankers in nursery stock species are characterised by the death of cambium tissue of woody stems, branches or twigs, causing them to sink in.
This pest can transmit a range of diseases.
Be alert to prevent damage from these pathogens.
Numerous conifer species are potentially at risk.
Black vine weevil (Otiorhynchus sulcatus) is a serious pest of ornamental nursery stock. The adults feed on susceptible plant foliage, leaving notched edges, and the larvae feed on roots.
Eelworms can carry viruses and cause damage by feeding on ornamental crops.
The threat to ornamental crops is on the increase.
Plants in poorly ventilated structures are vulnerable.
With their pear-shaped bodies, long antennae and a pair of rear-end siphunculi -- or exhaust pipes as they are sometimes described -- aphids are one of the most easily recognised and common glasshouse pests.
Foliage damage can render some plants unsellable.
Ash dieback is caused primarily by the fungal disease Chalara fraxinea. The number of infected trees in Europe has risen over the past few years, partly due to wet summer weather. Affected trees have been found in parks, gardens, garden centres, fore...
This disease attacks woody plants in the Rosaceae family, which includes apples and pears, their ornamental equivalents plus others including amelanchier, aronia, Chaenomeles, cotoneaster, Crataegus, pyracantha and sorbus.
This wood decay fungus can damage trees internally before any external evidence has been noticed.
The piercing and sucking mouthparts of these pests can lead to market rejections of ornamental crops.
Poor husbandry, physical damage to roots and various diseases can all cause water deficit in leaves and non-woody stems of plants, leading to loss of turgor pressure in cells and flaccid tissues that we recognise as wilting.
Whiteflies are sap-sucking insects that can be found in high numbers on protected crops. They can also attack outdoor crops including brassicas. Not true flies, but in the same order and division as aphids and scale insects, they produce honeydew tha...
Sooty moulds can take up levels of management time out of all proportion to the actual damage that they do to plants.
As well as attacking a wide range of crops, these pests can also carry major virus diseases.
Feeding by slugs and snails is so economically damaging to farmers, growers and gardeners that millions of pounds have been devoted to finding new ways to combat these molluscan pests.
The genus includes a range of pests whose adults and larvae can do serious damage to ornamental plants.
The waxy scales of these pests can protect them from predators and insecticides and damage plant stock.
Moles are widespread throughout Britain but absent from Ireland. Even small populations can damage sports turf, playing surfaces and amenity lawns, but control may not be necessary in less intensively used or managed areas. The damage is a side-effec...
Beech bark disease is most likely to attack trees with trunks that are more than 20cm in diameter, although it can also be a problem on young plantations. The disease occurs when heavy infestations of beech scale insect (Cryptococcus fagisuga) make e...
The biting mouthparts of this large group of pests mean that all parts of the plant are at risk of attack.
The animal's fast reproduction makes eradication impractical, but cooperative effort can limit crop damage.
Despite its limited impact on plant health, this fungal infection can cause customers to reject plants.
The most common and damaging pathogen on ornamental lawns and sports turf in the UK is the fungus Microdochium nivale (syn. Fusarium nivale).
This disease kills seedlings by drawing on the nutrients of a host's dead cells, causing plants to collapse.
Sudden oak death has caused extensive damage to a wide range of hosts on both sides of the Atlantic.
Young shoots on plants are susceptible to grazing damage while bucks' antlers can harm bark.
With action difficult and labour intensive, accurate identification of this root disease is key to tackling infection.
Soil-dwelling larvae of chafer beetles and crane flies are serious turf pests, feeding unseen in the topsoil layer beneath lawns, golf courses and sports fields. Chafer grubs also feed on roots of young trees, herbaceous perennials and nursery stock....
Dutch elm disease is a fungal wilt spread by the elm bark beetles Scolytus scolytus and Scolytus multi-striatus. Known in the UK since 1927, this disease was considered relatively unimportant until an outbreak of a more aggressive strain (Ophiostoma ...
The risk of this fungal infection on sports and amenity turf can be lowered through careful management.
Pustules make this a relatively simple problem to identify but action must be taken to avoid damage.
These troublesome pests can cause problems for growers of protected and outdoor ornamental crops.
Cyclamen, Poinsettia, Primula, Impatiens, Begonia, Nicotiana, Geranium and sweet peas are among 120 species in 15 families known to be susceptible to black root rot (Thielaviopsis basicola).
How to avoid losses from this common plant disease.
These easily-recognised glasshouse pests can wreak havoc with plants if they are not properly controlled.
Background During November 2010, Acacia sp., Banisteriopsis caapi and Brugmansia sp. plants imported by courier from the USA, were inspected by the Plant Health and Seeds Inspectorate (PHSI) and found to be infested with whiteflies. Samples ...
Background The lemon tree borer, Oemona hirta (Fabricius) (Coleoptera: Cerambycidae) is a longhorn beetle native to New Zealand, where it is considered to be one of their most common insects. A single live larva was intercepted in a Wisteria p...
Background In June 2008, the Plant Health Service in England and Wales was contacted by a private crop consultant concerned about a cecidomyiid infestation in a blueberry crop ( Vaccinium corymbosum ) at a nursery in Herefordshire. Anecdotal evide...
What is it and where is it found? Phytophthora lateralis is a fungus-like plant pathogen which causes an often fatal disease of trees, mainly in the genus Chamaecyparis. Lawson s cypress ( C. lawsoniana ) is the primary host. P. lateralis ...
What is it and where is it found? Phytophthora ramorum is a serious fungus-like pathogen causing damage to a wide range of trees and plants in Europe and the USA. In the EU, P. ramorum has been recorded as present in Belgium, Czech Republic ...
What is it and where is it found? Phytophthora kernoviae is a serious plant pathogen causing diseases of trees and shrubs in UK woodlands, heathlands and managed gardens. The pathogen was first discovered in October 2003 in historic woodland ga...
What are they? Five species of flea beetle assigned to the genus Epitrix(Coleoptera: Chrysomelidae ) feed on potatoes ( Solanum tuberosum ) in North America. The common name flea beetle derives from the ability of the adults to jump when dist...
Background While surveying North Warren RSPB Reserve, Suffolk, in September 2007, Heteroptera recorder Nigel Cuming found large numbers of an unfamiliar species of ground bug. Heteroptera experts Bernard Nau and Bill Dolling confirmed the iden...
Background Leucinodes orbonalis (Guene ) (Lepidoptera: Crambidae) is frequently intercepted by the Plant Health Service in England and Wales on imports of aubergine from Asia and Africa. Between 1999 and 2008 it was intercepted on 104 occasions...
A monthly round-up of news, information, products and research developments relating to the battle against pests and diseases.
Latest Pest & Disease News
- Extent of ash dieback problem in Northern Ireland revealed
- Fungicide hailed by Syngenta for storage rot protection
- Researchers blame neonicotinoids for bird decline
- HDC issues pansy disease guidance
- Outbreak: Phytophthora ramorum
- Wingssprayer an award contender
- Much welcomed re-issue for biological control handbook
- Warm and wet weather fuels box blight
- RHS warns on box tree caterpillar now established in UK
- Koppert develops drosophila control
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