The page highlights some of the available management measures and resources used to control and eradicate invasive non-native species (INNS). Any management of INNS must be put in place on a site-specific bases. Following some best practice publications (Including the Invasive species Ireland & DEFRA publications) will not always achieve the desired results on your site, e.g. recommend months and dates may have to be adjusted to take climate change and local weather patterns into consideration.
Legislation mentioned in the following resources may not necessarily apply to Northern Ireland, i.e. it may relate to GB or Ireland. Not all legislation may be listed and will inevitably change from time to time. It is the responsibility of the individual to ensure that they are aware of and follow all legislation relevant to work carried out and any changes to it.
The information on this pages relates to a range of INNS found in Northern Ireland. The following species have dedicated management resources pages;
The NIEA Widely Spread Species Management Measures Questionnaire (Terrestrial Plants) was produced to help highlight some of the key information that must be considered when developing management measures for a Widely Spread Species . The accompanying guidance notes provides a summary of some of the available management measures which should be used to complete the questionnaire.
| Widely Spread Species Management Measures Questionnaire (Terrestrial Plants)
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Accompanying notes for Widely Spread Species Management Measures Questionnaire (Terrestrial Plants)
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The following organisations have management resources available on their websites for a range of invasive non-native species;
IUCN datasheets provide management measures for species included on the ‘list of Union Concern’ including;
A list of available IUCN datasheets can be viewed here
Giant hogweed |
Himalayan balsam |
Japanese knotweed |
American skunk cabbage |
Floating pennywort |
Curly waterweed |
Parrot’s feather |
New Zealand pygmyweed  |
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Carpet sea squirt |
Slipper limpet  |
Pacific oyster |
Zebra mussel |
Pirri-pirri bur |
American mink |
Slider terrapin |
| Scotland’s centre of expertise for waters (CREW) – Methods for controlling or eradicating aquatic species – 2017
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Scottish Natural Heritage – Literature review on methods of control and eradication of Canadian pondweed and Nuttall’s pondweed in standing waters – 2011
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The Property Care Association offer invasive non-native species guidance to homeowners including;
| Guidance Note – Management of Himalayan balsam
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Guidance Note – Management of Giant hogweed
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Japanese knotweed
| Code of Practice – Managment of Japanese Knotweed
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A Homeowners Guide to Japanese Knotweed
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Guidance Note – Root Barrier and Japanese Knotweed Remediation
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| Guidance Note – Revegetation following Invasive Non-Native Weed Management
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Guidance Note – Safe and Effective Excavation and Burial
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NIEA – Japanese knotweed – Do Not Cut sign
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NIEA – Giant hogweed Avoid Contact sign
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