Pest & Disease Management Factsheets

Factsheets with detailed information on how to recognise and deal with the the most common plant pests and diseases.

Pest & Disease Management - Clubroot disease

Pest & Disease Management - Clubroot disease

Plasmodiophora brassicae can be a problem for all brassica varieties, Professor Geoffrey Dixon warns.

Pest & Disease Factsheet - Mealybugs

Pest & Disease Factsheet - Mealybugs

Heavy infestations of these sap-sucking pests can kill plants but preventive measures can be taken.

Pest & Disease Factsheet - Fungal leaf spots

Pest & Disease Factsheet - Fungal leaf spots

Fungal leaf spots are probably the most common of all plant diseases and on deciduous trees may appear dramatic -- such as acer tar spot (see picture) - but do little long-term damage.

Pest & Disease Management - Lettuce downy mildew

Pest & Disease Management - Lettuce downy mildew

Bremia lactucae can be a major problem for field vegetable growers, Professor Geoffrey Dixon warns.

Pest & Disease Factsheet - Red thread

Pest & Disease Factsheet - Red thread

The risk of this fungal infection on sports and amenity turf can be lowered through careful management.

Pest & Disease Management - Aphids

Pest & Disease Management - Aphids

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.

Pest & Disease Factsheet - Whiteflies

Pest & Disease Factsheet - Whiteflies

Whiteflies are sap-sucking insects that can be found in high numbers on protected crops. They can also attack outdoor crops including brassicas.

Pest & Disease Factsheet - Damping off

Pest & Disease Factsheet - Damping off

This disease kills seedlings by drawing on the nutrients of a host's dead cells, causing plants to collapse.

Pest & Disease Management - Sooty moulds

Pest & Disease Management - Sooty moulds

Sooty moulds can take up levels of management time out of all proportion to the actual damage that they do to plants.


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Pest & Disease Management - Honey fungus

Pest & Disease Management - Honey fungus

With action difficult and labour intensive, accurate identification of this root disease is key to tackling infection.

Pest & Disease Management - Spider mites

Pest & Disease Management - Spider mites

The glasshouse red spider mite, also known as the two-spotted spider mite, is a troublesome pest of both protected and outdoor ornamentals.

Pest & Disease Management - Ash dieback

Pest & Disease Management - Ash dieback

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.

Pest & Disease Factsheet - Peach leaf curl

Pest & Disease Factsheet - Peach leaf curl

Despite its limited impact on plant health, this fungal infection can cause customers to reject plants.

Pest & Disease Factsheet - Plane anthracnose

Pest & Disease Factsheet - Plane anthracnose

Foliage damage can render some plants unsellable.

Pest & Disease Factsheet - Caterpillars

Pest & Disease Factsheet - Caterpillars

The biting mouthparts of this large group of pests mean that all parts of the plant are at risk of attack.


Pest & Disease Management - Dutch elm disease

Pest & Disease Management - Dutch elm disease

Dutch elm disease is a fungal wilt spread by the elm bark beetles Scolytus scolytus and Scolytus multi-striatus.

Pest & Disease Management - Phytophthora ramorum

Pest & Disease Management - Phytophthora ramorum

Sudden oak death has caused extensive damage to a wide range of hosts on both sides of the Atlantic.

Pest & Disease Management - Thrips

Pest & Disease Management - Thrips

As well as attacking a wide range of crops, these pests can also carry major virus diseases.

Pest & Disease Management - Leafhoppers, capsids and suckers

Pest & Disease Management - Leafhoppers, capsids and suckers

The piercing and sucking mouthparts of these pests can lead to market rejections of ornamental crops.

Pest & Disease Management - Fusarium patch

Pest & Disease Management - Fusarium patch

The most common and damaging pathogen on ornamental lawns and sports turf in the UK is the fungus Microdochium nivale (syn. Fusarium nivale).

Pest & Disease Management - Wild rabbits

Pest & Disease Management - Wild rabbits

The animal's fast reproduction makes eradication impractical, but cooperative effort can limit crop damage.

Pest & Disease Management - Giant polypore

Pest & Disease Management - Giant polypore

This wood decay fungus can damage trees internally before any external evidence has been noticed.

Pest & Disease Management - Roe, fallow and muntjac deer

Pest & Disease Management - Roe, fallow and muntjac deer

Young shoots on plants are susceptible to grazing damage while bucks' antlers can harm bark.

Pest & Disease Management - Scab

Pest & Disease Management - Scab

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.

Pest & Disease Management - Beech bark disease

Pest & Disease Management - Beech bark disease

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.

Pest & Disease Factsheet - Slugs and snails

Pest & Disease Factsheet - Slugs and snails

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.

Pest and disease factsheet - Leaf miners

Pest and disease factsheet - Leaf miners

These larvae damage leaves on ornamental crops.

Pest & Disease Management - Beetles

Pest & Disease Management - Beetles

The genus includes a range of pests whose adults and larvae can do serious damage to ornamental plants.

Pest & Disease Factsheet -  Scale insects

Pest & Disease Factsheet - Scale insects

The waxy scales of these pests can protect them from predators and insecticides and damage plant stock.

Pest & Disease Management - Tarsonemid and eriophyid mites

Pest & Disease Management - Tarsonemid and eriophyid mites

These two key groups can cause damage across a variety of ornamental crops.

Pest & Disease Management - Moles

Pest & Disease Management - Moles

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.

Pest & Disease Factsheet - Cankers

Pest & Disease Factsheet - Cankers

Cankers in nursery stock species are characterised by the death of cambium tissue of woody stems, branches or twigs, causing them to sink in.

Pest and disease management - Sciarid fly

Pest and disease management - Sciarid fly

This pest can transmit a range of diseases.

Pest and disease management - Phytophthora root rots

Pest and disease management - Phytophthora root rots

Be alert to prevent damage from these pathogens.

Pest & Disease Management - Needle blights

Pest & Disease Management - Needle blights

Numerous conifer species are potentially at risk.

Pest & Disease Management - Vine weevils

Pest & Disease Management - Vine weevils

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.

Pest & Disease Management - Leaf and stem nematodes

Pest & Disease Management - Leaf and stem nematodes

Eelworms can carry viruses and cause damage by feeding on ornamental crops.

Pest & disease management - Powdery mildew

Pest & disease management - Powdery mildew

The threat to ornamental crops is on the increase.

Pest and disease factsheet - Downy mildew

Pest and disease factsheet - Downy mildew

Plants in poorly ventilated structures are vulnerable.

Pest & Disease Management - Wilt

Pest & Disease Management - Wilt

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.

Turf pests - Risks posed by leatherjackets and chafer grubs

Turf pests - Risks posed by leatherjackets and chafer grubs

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.

Pest & Disease Management - Rust fungi

Pest & Disease Management - Rust fungi

Pustules make this a relatively simple problem to identify but action must be taken to avoid damage.

Black root rot - A wide range of species is susceptible to this disease

Black root rot - A wide range of species is susceptible to this disease

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).

Aphids on protected ornamental crops

Aphids on protected ornamental crops

These easily-recognised glasshouse pests can wreak havoc with plants if they are not properly controlled.

FERA PLANT PEST FACTSHEET: Banded-winged whitefly (Trialeurodes abutiloneus)

FERA PLANT PEST FACTSHEET: Banded-winged whitefly (Trialeurodes abutiloneus)

FERA PLANT PEST FACTSHEET: Lemon tree borer (Oemona hirta)

FERA PLANT PEST FACTSHEET: Lemon tree borer (Oemona hirta)

FERA PLANT PEST FACTSHEET: Blueberry gall midge (Dasineura oxycoccana)

FERA PLANT PEST FACTSHEET: Blueberry gall midge (Dasineura oxycoccana)

A serious threat to Lawson's cypress (Chamaecyparis lawsoniana) - Phytophthora lateralis

A serious threat to Lawson's cypress (Chamaecyparis lawsoniana) - Phytophthora lateralis

FERA PLANT PEST FACTSHEET: Phytophthora ramorum

FERA PLANT PEST FACTSHEET: Phytophthora ramorum

FERA PLANT PEST FACTSHEET: Phytophthora kernoviae

FERA PLANT PEST FACTSHEET: Phytophthora kernoviae

FERA PLANT PEST FACTSHEET: Wheat Bug (Nysius huttoni)

FERA PLANT PEST FACTSHEET: Wheat Bug (Nysius huttoni)

FERA PLANT PEST FACTSHEET: Eggplant Borer (Leucinodes orbonalis)

FERA PLANT PEST FACTSHEET: Eggplant Borer (Leucinodes orbonalis)

FERA PLANT PEST FACTSHEET: Citrus longhorn beetle  (Anoplophora chinensis)

FERA PLANT PEST FACTSHEET: Citrus longhorn beetle (Anoplophora chinensis)

Rust

A guide to identifying and treating this fungal disease, which can lead to defoliation and die-back.

Browntail and gypsy moths

Browntail and gypsy moths

Browntail and gypsy moth caterpillars can cause much damage to trees, but their risk to human health poses a bigger problem to local authorities.


Forthcoming Events

International Conference on Global Plant Health Risks and Consequences

  • Lakeside Conference Centre Fera, Sand Hutton York, North Yorkshire YO41 1LZ

International Conference on Global Plant Health Risks and Consequences

Glasshouse soft fruit - cost saving and technology day

  • Leythorne Nursery (Hall Hunter Partnership), Chichester