Maintain plant health with our plant pest and disease alerts and factsheets on the most common threats.
PEST & DISEASE FACTSHEETS
Downy mildew: protecting plants against downy mildew attacks
Wilt: How growers can recognise pathogens and protect ornamental plants
Rust: Protecting plant crops against rust infections
Spider mites: how ornamentals growers can deal with spider mite threat
Scale insects: Protecting ornamental crops against sap-feeding scale insects
Moles: Options to control root and surface damage caused by tunnelling moles
Leaf and stem nematodes: how cultural controls and nursery hygiene are crucial to combat damage to plants
Botrytis: How to avoid Botrytis infections
How using green manure can boost growers’ crops
Slugs and snails: natural and chemical control options available to growers
Takahashia japonica: cotton stringy scale insects' distinctive ovisacs could lower aesthetic value
Prunus bacterial spot/canker: this notifiable disease can inflict serious damage on all Prunus species
Tasmanian eucalyptus beetle: Eucalyptus trees face the risk of significant defoliation from a beetle that is expected to become established in the UK
Pepper weevil: sweet peppers, chilli peppers and other Solanaceae are at risk from this small but potentially devastating pest
Lemon tree borer: Wood-boring larvae of this beetle could wreak serious economic and environmental damage to native trees and shrubs
Red palm weevil: retailers and growers must beware of this highly invasive pest
Japanese beetle - chafer beetle poses a significant economic, social and environmental impact if it reaches the UK
Tomato brown rugose fruit virus: can inflict considerable yield losses in commercial tomato and sweet pepper production
Citrus longhorn beetle: this pest threatens to alter our rural, urban and garden landscapes for good
Two-lined chestnut borer: the arrival of this beetle would be another nail in the coffin of the UK's oak trees
PLANT HEALTH NEWS
Winners and losers this horticulture week
Most read this horticulture week: peat, RHS, imports, pests, garden centre closing
Defra figures: Plant trade imports rise and exports fall
Plant importing ‘horrendous’ and ‘worst it’s ever been’, UK importers and European exporters tell HortWeek
Biggest pest and disease problems 2022-24 revealed
Plant import disruption continues
Pest risk analysis published
Border plant import issues ease after HortWeek raises awareness
Woodland Trust, National Trust, RHS and HTA demand more British trees now, but ‘rollercoaster’ grants and other issues remain
Apple sauce attracts vine weevils, latest research finds
Delay and damage ‘now the norm’, say importers
Ash dieback means trade will never sell the tree again
Winners and losers this horticulture week: imports, head gardeners and trees, peat
APHA acknowledges plant import issues at Border Control Point
Horticulture Careers showcases launch this October
Plant Healthy passes 100 members
HTA calls again for Government to help horticulture in autumn budget
PEST & DISEASE ALERTS: W/C 30 September 2025
Slug Fest supplies pest solutions
Bionema wins £647,000 slug-control funding
John Adlam to concentrate on water and nursery development
Defra CITES consultation could ease costs and red tape
New HSE neonicotinoid advice issued
New Defra boss set to progress horticulture EU-UK agreement
Poinsettia event to hear latest on peat, whitefly and new varieties
John Adlam's Monthly Nursery Checklists
1 October – Bacteria, biocontrol and Botrytis
1 September – Sawfly, scab and stem cankers
1 August – Sap, spider mites and spraying
1 July – Camellias, capsids and caterpillars
1 June – Scale insects, slugs and spider mites
1 May - Bacterial infections, bees and blister mites
1 April – Beetles, biocontrols and blossom wilt
1 March – Aphids, biological control and box blight
1 February - Field planning, frost and Fructogard
1 January - Feeding, field weeds and fogging
1 November - Bud blindness, disease control and glasshouses
1 October - Caterpillars, Choisya and compost tea
EAMU MONTHLY ROUNDUPS
EAMU roundup: September 2025
EAMU roundup: August 2025
EAMU roundup: July 2025
EAMU roundup: June 2025
EAMU roundup: May 2025
EAMU roundup: April 2025
EAMU roundup: March 2025
EAMU roundup: February 2025
EAMU roundup: January 2025
EAMU roundup: November 2024
EAMU EXPIRY ALERT
EAMU authorisations that are due to expire by the end of January 2025.