The influence of habitat conditions on the performance of two invasive annuals


A new paper detailing research conducted in 2008–2010 discusses the influences of habitat conditions on Himalayan balsam and Bidens frondosa, another invasive plant species

K. Kostrakiewicz-Gierałt, M. Zając. (2014) The influence of habitat conditions on the performance of two invasive, annuals — Impatiens glandulifera and Bidens frondosaBiologia. April 2014, Volume 69, Issue 4, pp 449-462.

Population genetics of Himalayan balsam


Image of booksNew book published on the population genetics of Himalayan balsam (Impatiens glandulifera) which compares native and introduced populations.

It look at how invasive species can interfere in the structure and functioning of ecosystems, and how a better understanding of the evolution of such species will be useful when planning their management and eradication.

See the book online.

Wales’ economy counts £7bn cost of invasive plant species


Himalayan blsam

Himalayan balsam

The total costs in Wales of dealing with invasive species over the years has been put at £7bn by Wildlife Trusts Wales, the collective body for nature trusts throughout Wales.

An inquiry found that Japanese knotweed, Himalayan balsam and rhododendron were having a ‘significant negative economy and environment impact’ on parts of Wales.

See the news story >

Biocontrol of escaped ornamentals


Picking orange balsamA new paper discusses biological control (using natural enemies) of plants that have escaped from gardens and are invading wild habitats in UK. These include Japanese knotweed, Himalayan balsam, Australian swamp stonecrop, floating pennywort, giant hogweed, water fern, rhododendron and buddleja.

Research points to Himalayan balsam as a soil erosion problem


Himlayan balsam root ball with soil

Himlayan balsam root ball with soil

Himalayan balsam (Impatiens glandulifera) promotes soil erosion along watercourses, according to research published in the Journal of Soil Sediments last month (Dec 2013)

Philip Greenwood and Nikolaus Kuhn from the University of Basel show that erosion along riparian zones is statistically greater where Himalayan balsam is present when compared to topographically comparable sites that support natural vegetation. 

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