Biocontrol introduction
Target pest: Cirsium arvense (Asterales: Asteraceae), Californian thistle
Agent introduced: Apion onopordi (Coleoptera: Brentidae) = Ceratapion onopordi, Acanephodus onopordi, Californian thistle stem miner
General comments:
See Ceratapion onopordi entry for details.
References
Gourlay H (2010). Californian Thistle Stem Miner. In The Biological Control of Weeds Book (Landcare Research) http://www.landcareresearch.co.nz/research/biocons/weeds/book/documents/Californian_Thistle_Stem_Miner.pdf
