Letter To The Editor |
Corresponding author: Daniel Jones ( daniel.ll.jones@gmail.com ) Academic editor: Ingolf Kühn
© 2020 Daniel Jones, Mike S. Fowler, Sophie Hocking, Daniel Eastwood.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Jones D, Fowler MS, Hocking S, Eastwood D (2020) Please don’t mow the Japanese knotweed! NeoBiota 60: 19-23. https://doi.org/10.3897/neobiota.60.56935
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We welcome
As
While we acknowledge that mowing is a widely applied vegetation management method for infrastructure maintenance, cutting as a management method for established invasive knotweeds has been reported as ineffective in the medium to long-term at a range of spatial scales throughout the academic and grey literature in Europe and North America (
Historically, where cutting was proposed as a management method in the UK and North America, it was suggested that Japanese knotweed stems were cut down to ground level at least every 2 to 3 weeks through the growing season to deplete belowground rhizomes (
Aside from limited efficacy, consideration of practicality and the risk of further spread of Japanese knotweed in the environment should inform the application of mowing. Accessing large swathes of invaded riparian or roadside habitat with heavy equipment is frequently problematic, and it is crucial to ensure that stem and rhizome fragments created by cutting methods do not result in wider dispersal of knotweed into the environment (
There are strong environmental, ecological and economic arguments for the management of invasive alien plants (IAPs) to minimise their negative environmental and economic impacts (
In short, to achieve the successful control and long-term management of invasive rhizome-forming plants, we should do more with less, as the evidence guides us (
This work is part-funded by the European Social Fund (ESF) through the European Union’s Convergence programme administered by the Welsh Government with Swansea University and Complete Weed Control Ltd.