One year after glyphosate treatment approximately 80% of C. helmsii had been killed, although it is not clear whether this was a direct result of the use of carpet or was due to herbicide application. Controlling New Zealand pygmyweed Crassula helmsii. What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. We send our periodic newsletters and other important updates about the project. ... New Zealand pygmyweed Credit: Alamy Seven reasons why fishing is good for you, National Waterways Museum, Ellesmere Port, National Waterways Museum, Gloucester Docks, Anderton Boat Lift Visitor Centre, Cheshire, Standedge Tunnel and Visitor Centre, Yorkshire, Pontcysyllte Aqueduct and Visitor Centre, North Wales, Volunteering roles for people who love boating. Last Friday, and yesterday, saw the Midweek Group out at Loch Flemington to carry out some NZ Pygmy Weed control. In autumn 2002, strips of carpet were placed over C. helmsii and weighted down wherever possible on the pond edge and in shallow water. Photo Credit GBNNSS. Celebrate the life of a loved one by giving a gift in their memory, Got a favourite place in mind? In larger ponds and lakes, a floating boom can be used to sweep the surface from end to end. In Scotland there is a different list of species. A before-and-after study in 2002-2003 at a single pond in Surrey, UK (Anonymous 2004) reported that covering C. helmsii with carpet strips followed by the application of glyphosate reduced the area of the plant, although no statistical tests were carried out. Tim Dawson from SNH, who is managing the project and who we are carrying out the work for, joined … Control. Find out how our expert teams work together to make life better by water, We have vacancies across all of our waterways and in the offices, museums and attractions that support them. New Zealand recorded its first day of no new cases of coronavirus disease 2019 (COVID-19) early this week, more than a month after its strict lockdown began. Managers should always take measures to reduce the risk of In general, programmes should spray the plant material with glyphosate and attempt to treat marginal areas with light proof barriers. using hot foam, herbicide and by burying at Old Moor RSPB Reserve, South Yorkshire, England Published source details Bridge T. (2005) Controlling New Zealand pygmyweed Crassula helmsii using hot foam, herbicide and by burying at Old Moor RSPB Reserve, South Yorkshire, England. We're one of the UK's biggest charities and we take pride in everything we do, If you're thinking of getting in touch then please take a moment to look through these pages as we probably have the answer on our website, As the weather is warming up we want everyone to be able to enjoy our canals and rivers in the safest possible way, We're continually carrying out work to improve our canals and rivers. Crassula helmsii: Use a combination of control measures, Crassula helmsii: Use lightproof barriers to control plants, Crassula helmsii: Chemical control using herbicides. It spreads mainly by tiny plant fragments being transferred into new locations, which can then grow into a new plant. New Zealand Pigmyweed, copyright GBNNS Spreading across the country since the 1970s, this yellow and green stemmed plant can re-grow from the tiniest fragments. In July-August 2003 the carpet was removed and the glyphosate-based herbicide Roundup was applied twice. 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