Invasive Species – Giant Hogweed
Giant Hogweed (Heracleum Mantegazzianum) was among many foreign plants introduced to Britain in the 19th Century as ornamentals. Giant Hogweed is native to Central Asia.
It is now widespread throughout Britain and Ireland especially along riverbanks and on waste ground. The statuesque plant can grow to a height of 4 metres by forming dense stands, it can oust native plants and reduce wildlife habitats.
Abundant seed production, a persistent root stalk, and vegetative reproduction from perennating buds are cited as reasons for its capability to colonise rapidly.
This plant produces a sap that is hazardous to humans, particularly in the presence of direct sunlight, it can cause severe skin inflammation. Initially, the skin colours red and starts itching, blisters occur within 24-48 hours after exposure and dense pigmentation of the affected area occurs approximately one week later. The skin reaction may remain sensitive to ultraviolet light for years.
This highly invasive species is a cause for concern in that it is a human health hazard.
