Property Care Association
Professional guidance on identifying and managing invasive weeds, including technical notes and resources for the property sector.
Explore PCA invasive weed guidance ↗Guidance and evidence
Useful resources.
Professional guidance, official information and published research on invasive plant management.
Start here
Guidance and standards.
Environment Agency and GOV.UK
Official guidance for England on preventing the spread of invasive non-native plants and handling plant material.
Read the invasive plant guidance ↗RICS
The RICS professional standard on Japanese knotweed and residential property, relevant to surveys, valuations and property transactions.
Read the RICS standard ↗Published studies
Research worth reading.
Assessing the relative impacts and economic costs of Japanese knotweed management methods
Hocking et al · 2023 · Scientific ReportsCompares environmental and economic effects of different management approaches.
Read the paper ↗Optimising physiochemical control of invasive Japanese knotweed
Jones et al · 2018 · Biological InvasionsExamines treatment methods and their performance.
Read the paper ↗Review of existing knowledge and practices of tarping for the control of invasive knotweeds
Dusz et al · 2021 · PlantsReviews evidence for tarping as a control method.
Read the paper ↗Invasive Japanese knotweed and related knotweeds as catalysts for streambank erosion
Colleran et al · 2020 · River Research and ApplicationsExplores knotweed and streambank ecology.
Read the paper ↗Economic costs of biological invasions in the United Kingdom
Cuthbert et al · 2021 · NeoBiotaRead the paper ↗Research informs treatment choices, but the right response still depends on a site assessment. Ask us about your site.