Tweed Invasives Project

The Tweed Invasives Project has been delivering comprehensive control of Giant Hogweed and Japanese Knotweed across the Tweed catchment since 2003.  The Project expanded to include Himalayan Balsam control within the Till subcatchment in 2005. Invasive species such as Giant Hogweed, Japanese Knotweed and Himalayan Balsam, pose a serious threat to our natural heritage by out-competing native species.  They can out-compete because the natural checks and balances (e.g. predation) which native species are subject to do not affect non-native species. The Project uses various elimination methods, including spraying (with certified herbicides) and hand-pulling, to ensure that these damaging invasive species are prevented from flowering each year.  For plants such as Giant Hogweed, with a seed-life of up to 12 years, this is vital in ensuring the eventual eradication of the species from the Tweed catchment.  The Project is a close collaboration between Tweed Forum staff and local landowners, farmers, ghillies, fishermen and volunteers.  This means that the control work is carried out in partnership, a key factor in the success and longevity of our work.

In recent news, we have joined forces with Scottish, Northern and Southern Irish Partners to secure funding which will support the Tweed Invasives Project from 2011 through to 2015. This partnership is part-financed by the European Union’s INTERREG IVA programme.

Click here to find out how the project is progressing as we enter our tenth year of invasive plant control in the Tweed catchment.

A brief history of the project is available here, a more comprehensive review is available in Tweed Invasives Project: A Case Study.

The Tweed Invasives Project is an integral part of the Tweed Catchment Bio-Security Planning initiative (you can download the plan below).  As part of our Bio-Security planning we share information with the Tweed Foundation, who act on reports of invasive aquatic animal species within the catchment. You can report a sighting of an invasive aquatic animal, such as American signal crayfish, to the Foundation using this link

Tweed Catchment Bio-Security Plan (Plan, 2011-2016)
- Controlling Invasive Plants in the Tweed Catchment (Leaflet, 2014)
- Tweed Invasives Project: Summary Report 2014
- Assessment of Impact of Long Term Control of Invasive Non-native Riparian Plants in the Tweed Catchment and Restoration of Native Biodiversity (Report, 2013)
- Tweed Invasives Project: A photographic record of progress between 2004 and 2009 (Photo Report, 2009)
- Tweed Invasives Project:  A case study of the Tweed and practical steps to establishing and delivering a successful, long-term control strategy (Report, 2006)


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