06 September 2021

Study warns of 'dramatic' increase in Japanese Knotweed cases

Study warns of dramatic increase in Japanese Knotweed cases image

The number of confirmed Japanese Knotweed cases in the UK have increased by 28% over the last five years, a new study has revealed.

Using figures from 49 local authorities, Horticulture.co.uk found there are now 29,536 confirmed cases every year of the invasive plant species.

South Yorkshire, Hampshire & West Sussex were the three counties with the fastest growing number of cases, the data reveals.

According to the data, there are a further 19,702 unconfirmed cases of Japanese knotweed, with thousands more in the UK likely to remain unreported.

Thomas O’Rourke, editor of Horticulture.co.uk, said: 'The findings show a dramatic increase in the number of live Japanese Knotweed cases, despite the reduction in monitoring caused by the pandemic. This is worrying news for both native wildlife and property owners in the UK – where a live knotweed invasion can cause structural damage and the ‘crowding-out’ of native species.

'Given this impact on the habitat of native UK species, it’s important for environmental organisations to understand and access the latest records on where they can be found in the UK. This helps with monitoring and management programmes to control its spread.'

Horticulture.co.uk has launched an interactive map to encourage people to report live cases to their local council.

A commitment to civil debate image

A commitment to civil debate

Cllr Arooj Shah has been the target of recent threats and harassment. Leaders from all parties in Oldham have now come together to add their signature to a ‘politics, not personalities’ pledge, she explains.
For your free daily news bulletin
Highways jobs

Principal Human Resources Adviser

Royal Borough of Greenwich
£37722 - £40869 per annum
Principal Human Resources Adviser - 1 year Fixed Term ContractRoyal Greenwich is ambitious in its commitment to residents and to service delivery. We' England, London, Woolwich
Recuriter: Royal Borough of Greenwich

Network Architect

Camden London Borough Council
Competitive Salary
The job holder will require a good understanding of security & connectivity practices in the context of Cloud services preferably Microsoft Azure. Camden, London (Greater)
Recuriter: Camden London Borough Council

Transport Development Officer

North Yorkshire County Council
£39,880 - £43,857 per annum
A flexible working offer that allows you to have a true work/life balance. Northallerton, North Yorkshire
Recuriter: North Yorkshire County Council

Recycling Manager

Camden London Borough Council
£41,952 - £48,663
The position sits within the North London Waste Authority’s (NLWA’s) Strategy and Services team, managing... Camden, London (Greater)
Recuriter: Camden London Borough Council

Traffic Management Officer - Carlisle

Cumbria County Council
£31.346 - £32.234
This role involves working within the traffic team liaising with members of the public and councillors agreeing and... Cumbria
Recuriter: Cumbria County Council

Public Property

Latest issue - Public Property News

This issue of Public Property examines how how flexible workspaces can lead the way in regeneration for local authorities, Why local authority intervention is key to successful urban regeneration schemes and if the Government’s challenge of embracing beauty is an opportunity for communities.

The March issue also takes a closer look at Blackburn with Darwen Council's first digital health hub to help people gain control over health and care services.

Register for your free digital issue