Pest & Disease Factsheets
Factsheets with detailed information on how to recognise and deal with the the most common plant pests and diseases.
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.
These sap-sucking pests with their pear-shaped bodies, long antennae and a pair of rear-end siphunculi - or exhaust pipes as they are sometimes described - are one of the most easily recognised and common glasshouse pests which pose a threat to many ...
Foliage damage can render some plants unsellable.
Wet weather has helped this disease to spread.
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.
Tight controls can keep infections to a minimum.
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.
This pest attacks both protected and outdoor crops.
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.
Eelworm pests are numerous and can damage a range of plants but some species are beneficial.
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. This damage causes in excess of £30m in annual losses for the ...
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.
These pathogens can pose significant disease risks.
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 fly, moth and beetle larvae can cause growers problems across a wide range of plants.
These two key groups of microscopic mites can pose a serious threat to ornamental crops.
These troublesome pests can cause problems for growers of protected and outdoor ornamental crops.
This damaging pest can transmit root rot diseases and their larvae can be harmful to plant growth.
Accurate identification of the species in an outbreak is vital to choose the correct chemical treatment.
The death of inner bark tissue can cause shoots beyond a canker to wilt and die through a lack of water.
The biting mouthparts of these pests leave no parts of plants entirely safe from attack.
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).
Downy mildew is a foliar fungal disease characterised by dark felting on the undersides of infected leaves. It belongs to the same fungal order as Pythium and Phytophthora. Most of the species that are pathogenic on commercial ornamental crops are ho...
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 ...
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A monthly round-up of news, information, products and research developments relating to the battle against pests and diseases.
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