Learn how tohandle worstalien invaders

Guest speakers from Inland Fisheries Ireland and the Scottish Rivers and Fisheries Trust will be able to answer queries on how to identify and control Japanese knotweed, Giant hogweed and Himalayan balsam.

The pests are classified as amongst the 100 worst non-native invasive species in the world.

Christine Doherty, Derry City Council and Strabane District Council’s Biodiversity Officer stated: “Japanese knotweed was introduced in the 19th century as an ornamental plant from Japan, but is now spreading rapidly throughout the British Isles and is causing problems in the Derry City Council area.

“It is recognised as an expensive maintenance problem, as its shoots penetrate impermeable surfaces, causing serious damage to buildings, walls, roads, footpaths and blocking drains.

“Many banks have declined or added conditions to mortgages on properties where this plant is found, as it is a long term and expensive process to eradicate this plant. Under Schedule 9 of the Wildlife Order (NI) 1985, it is an offence to plant or cause it to grow in the wild.

“This places a duty of care on landowners to prevent the further spread to adjacent land.

“Giant Hogweed is a tall plant (2 - 5 m), which grows along river banks and poses a serious threat to human health. The sap contains a chemical, which in contact with human skin and combined with sunlight, results in severe itching, burning and blistering.

“These lesions are slow to heal and may persist for up to six years. The reaction can be acute in children, who may need hospital treatment. This plant is considered a serious and significant danger to public health.”

For further information contact Christine Doherty on 02871 365151 or email [email protected].