Category Archives: Uncategorized

Weed biocontrol projects update


CABI weed biocontrol summaries September 2014_Page_1

Defra is funding CABI to investigate the biological control of invasive, non-native aquatic and riverside weeds. This could help protect habitats where chemical and mechanical control are impractical or prohibitively expensive; and to help meet requirements of the EU Water Framework Directive.

See the latest updates of our work.

Consultation on the release of a rust to control Himalayan balsam


Defra are seeking your views and supporting evidence on the Pest Risk Assessment and proposal to lift the quarantine restrictions of Puccinia komarovii var. glandulifera. Defra are also seeking your views on the utilisation of this rust fungus (after rigorous safety testing) for the biocontrol of the highly invasive non-native plant, Himalayan balsam, (Impatiens glandulifera).

Please send any responses to Simon Mackown at: himalayanbalsambiocontrol@defra.gsi.gov.uk 

Himalayan balsam and soil erosion


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.