Welcome to the Scottish Invasives blog. Invasive non-native species (or INNS) are plants and animals that have been introduced to areas outside their natural range. INNS are currently recognised as one of the greatest threats to biodiversity. The Scottish Invasives blog is intended as an informal forum for those interested in invasive species control. If you wish to contribute, please get in contact. You can click on any of the images to see them at higher resolution.

Wednesday, 18 August 2010

Cutting balsam

Unlike most invasive plants, Himalayan balsam can be effectively controlled without using chemicals. Scattered plants can be uprooted, while dense stands can be cut using a Martindale weed slasher.


  1. BTCV volunteers have also been using this method in areas where the balsam is occurring in dense stands...however in dry areas where there is a lot of old wood and dead trees about they have been encountering a high number of wasp nests which are less than pleasant to you when your swiping around their nest with a slasher! Anyone else encountering a higher than normal volume of wasp nests in areas where they are controlling HB?

  2. Yes, wasps are a problem in Glenurquhart too. A long-bladed slasher and fast running shoes recommended!