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Biocontrol introduction

Target pest: Cytisus scoparius (Fabales: Fabaceae), Scotch broom, broom

Agent introduced: Agonopterix assimilella (Lepidoptera: Oecophoridae), broom shoot moth

Imported: 2006

Import source: Surrey Heaths; Yorkshire, UK; southern France

Import notes: Imported by Landcare Research on behalf of the Canterbury Broom Group.

Released: 2008

Release details: Released at 9 sites by March 2009. Landcare Research (2014c) - released at limited sites as difficult to rear.

Establishment: Landcare Research (2013b) - only evidence of establishment at one site in Southland to date. Landcare Research (2016i) - establishment success is uncertain. Landcare Research (2017g) - appears to be established in low numbers at perhaps 3 sites.

General comments: 13 Mar 2006 – application by the Canterbury Broom Group to release from containment Agonopterix assimilella (Treitschke, 1832) and Gonioctena olivacea (Förster, 1771) for biological control of the weed broom. EPA Application # NOR05003, approved with controls 26 July 2006.


Gourlay H (2010). Broom Shoot Moth. In The Biological Control of Weeds Book (Landcare Research) http://www.landcareresearch.co.nz/research/biocons/weeds/book/documents/Broom_Shoot_Moth.pdf

Gourlay, H (2009). The biological control of broom (Cytisus scoparius) IUFRO International Forest Biosecurity Conference, 16-20 March 2009, Rotorua, New Zealand. Popular Summaries. Compiled by Richardson M, Hodgson C and Forbes A. New Zealand Forest Research Institute Limited. 230-232

Landcare Research (2013b). Spring activities What's new in biological control of weeds? 65: 9 http://www.landcareresearch.co.nz/publications/newsletters/biological-control-of-weeds/issue-65

Landcare Research (2014c). Who's who in biocontrol of weeds? What's new in biological control of weeds? 69: 10-11 http://www.landcareresearch.co.nz/publications/newsletters/biological-control-of-weeds/issue-69

Landcare Research (2016i). Who's who in biological control of weeds? Weed Biocontrol: What's New? 77: 10-11 http://www.landcareresearch.co.nz/publications/newsletters/biological-control-of-weeds/issue-77

Landcare Research (2017g). Who's who in biological control of weeds? Weed Biocontrol: What's New? 81: 10-11