Japanese Knotweed

David Gregson has 40 years’ experience on managing and controlling Japanese Knotweed in the environment. He advises a number of major organisations and public bodies on Japanese Knotweed control.  He acts as an Expert Witness in litigation claims concerning Japanese Knotweed infestations.  He is in contact with the leading researchers on Japanese Knotweed control in the U.K.

Instructions are accepted from Solicitors representing clients affected by Japanese Knotweed problems, who require an expert report to be prepared in contemplation or in response to litigation.  Instructions are also accepted from corporate bodies who require advice on Japanese Knotweed control. This work is undertaken in association with Advanced Invasives, who are at the cutting edge of research into this topic.

Advanced Invasives can be contacted direct via the following website link: www.advancedinvasives.com

We do not offer an advisory service to the public. Private individuals with Japanese Knotweed problems are advised to contact a local control company. The only known effective treatment is herbicidal, and the only effective control agents currently available are glyphosate based compounds. Private individuals are advised to avoid companies offering other types of treatment.