Invasive species

The DAA work parties expend a huge effort during the summer trying to cut down the masses of Himalayan Balsam along the banks of the summer before it turns to seed. The Ochils Landscape Partnership [OLP] have taken on a large programme of spraying with herbicide the large stands of Himalayan Balsam and particularly the Japanese Knotweed.

Alongside this the River Forth Fishery Trust are operating the Forth Invasive Non Native Species Programme [INNS] to prevent, map and control invasive species. Their priorities are:

  • Himalayan Balsam [very common on the Devon]
  • Japanese Knotweed [common on the Devon]
  • Mink [present along the whole of the River]
  • Giant Hogweed [rare on the Devon but prolific on the Forth & Allan]
  • American Skunk Cabbage
  • Signal Crayfish

See for details of the programme and species identification

While parts of the catchment have been extensively mapped by INNS/DAA/OLP there are probably gaps.  INNS have provided a simple tool to report sightings which we urge any angler on the Forth Catchment to use:

My personal advice for anglers on the Devon …….. spend ten minutes every time you are on the river side and pluck any stems of Himalayan Balsam beside you and you will be amazed how much you can clear [I am sure that there are several very poor puns that made to describe this work based on the work PLUCK too 😉 ]





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