ELF Trust, Harewood, Calstock
Removal of Giant Hogweed on land managed by the ELF trust,
mainly comprising some 8 to 9 acres of SSSI.
The site is situated on the Cornish (western) bank of the River Tamar, 500 meters west and 700 metres north-east of O.S. Grid Ref: 452690
With co-ordination and funding, from English Nature and The Environment Agency, the River Tamar is being cleared of Giant Hogweed. The bulk of the work is being undertaken by 'Sylvanus' using glyphosate, possibly the Roundup concoction.
Giant Hogweed(Heracleum mantegazzianum) is a native of the Caucasian Mountains between Russia and Turkey, reportedly, introduced into the UK for ornamental purposes in the late 1800's.
Giant Hogweed's density and lack of persistant and binding root structure contribute to bank errosion.
The sap of the freshly cut stem and leaves
- in the presence of sunlight -
is highly irritant, and
causes large blisters.
Plots | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 |
1 to 8 | 2315 | 1123 | 268 | 104 | 49 | 22 | 16 | 2 | 5 | 1 | 0 |
A to H | 1572 | 2588 | 3267 | 1691 | 567 | 201 | 250 | 112 | 50 | 25 | 7 |
Non SSSI | 8 | 334 | 191 | 76 | 53 | 28 | 30 | 2 | 6 | 5 | 2 |
Totals | 3895 | 4045 | 3726 | 1871 | 669 | 251 | 276 | 116 | 61 | 31 | 11 |
2012 Five looked like second yearlings
2011 Found one large plant, about to flower in plot A
2010 Have found a two plants in the western marsh boundary ditch, so I have extended Plot F to include this ditch. There have on other occasion been a couple there which have been recorded otherwise.
Found one large plant, about to flower in plot 5, and a few pretty big plants in the western fen meadow.
2008 Have found a few rather large plants in the 'compost field'. They must have been there last year??
Download details and map ghogweed.xls 369Kb