RIPARIAN INVASIVE NON-NATIVE SPECIES (INNS) PROJECT
The INNS project began in April 2010 and aims to take a catchment approach to tackling invasive species. The main objective is to reduce the spread of Himalayan balsam and Japanese knotweed along the river bank improving the diversity of native species and improving access. Control work is carried out in a top down approach, starting at furthest upstream colony and working down river. This reduces the chance of any areas controlled downstream being re-colonised by infestations further upstream..
Himalayan balsam flower and seed pods
HIMALAYAN BALSAM CONTROL
Controlling Himalayan balsam has been carried out in partnership with the Criminal Justice Service who have supplied community service work groups to cut areas of balsam along the river bank. The work has focused on the area between Three Waters Meet and Woodfoot Bridge and large areas have been cut and hand pulled. Himalayan balsam is an annual plant and the aim of the control work is to prevent seeding resulting in the depletion of the seed bank. Research has shown that this can take between 12 - 18 months.
- Stems are hollow, jointed and brittle. Plants can grow up to 3 metres tall. Leaves are spear shaped with serrated edges and grow in whorls of three.
- Flowers are slipper shaped on long stalks and vary from purplish pink to pale pink.
- The plant flowers between June and October.
- Seed pods are produced between July and October and explode when touched