Category Archives: Japanese Knotweed

International Invasive Weed Conference

The International Invasive Weed Conference is being held on 22nd November 2018 and will cover topics Identification, Assessment and Response followed by a panel debate led by the PCA. For more information and to book a place please click here: It should be a very interesting event.


Large Infestations of Japanese Knotweed

Treating large infestations of Japanese knotweed does take time. Using stem injections six months later can have some good initial effect, but still requires long term monitoring.  (Yes for those keen eyes there is more Japanese knotweed in the background of the second photo! At this visit requested not to treat it, which is why monitoring is also so important to control the activity of the plant.)

What to do when you find Japanese knotweed

PCA’s Technical Manager for Invasive Weeds Peter Fitzsimons, spoke on the BBC Radio Ulster – On Your Behalf programme about Japanese Knotweed. The programme discusses ‘the issues with Japanese Knotweed, what to do and what not to do when you find it on your propertyTo listen please click the link, the article is 27 minutes in: