Information

Agent

Corythucha distincta Osborn & Drake

Class: Insecta
Order: Hemiptera
Family: Tingidae
Incorrect Past Names/Synonyms: Corythuca disticta Osborn & Drake

Notes: Incorrectly spelled as Corythuca disticta in the previous edition of catalogue.

Agent Name References:
- Drake, C.J. 1919. On some North American Tingidae (Hemip.). The Ohio Journal of Science 19(7): 417-421.
- Hansen, R. and C. Southwick. 2010. Biological control of Canada thistle. In CPHST Biological Control Unit 2010 Annual Report. USDA APHIS PPQ. pp. 1-4.

Agent Synonym References:
- Baker, L. 1997. (personal communication) Fremont County Weed and Pest, Lander, Wyoming, United States of America.
- Julien, M.H. and M.W. Griffiths, Eds. 1998. Biological control of weeds: a world catalogue of agents and their target weeds, Fourth edition. CABI Publishing, New York. 243 pp.

Agent Notes References:
- Julien, M.H. and M.W. Griffiths, Eds. 1998. Biological control of weeds: a world catalogue of agents and their target weeds, Fourth edition. CABI Publishing, New York. 243 pp.

Weed

Cirsium arvense (L.) Scop.

Family: Asteraceae
Common Name: Canada thistle, creeping thistle, Californian thistle, field thistle

Origin: Eurasia

Weed Name References:
- Cripps, M.G., A. Gassmann, S.V. Fowler, G.W. Bourdôt, A.S. McClay, and G.R. Edwards. 2011. Classical biological control of Cirsium arvense: lessons from the past. Biological Control 57: 165-174.
- Piper, G.L. and E.M. Coombs. 2004. Thistles. In E.M. Coombs, J.K. Clark, G.L. Piper, and A.F. Cofrancesco, Eds. Biological Control of Invasive Plants in the United States. Oregon State University Press, Corvallis, Oregon. pp. 345-378.

Weed Common Name References:
- Cripps, M.G., A. Gassmann, S.V. Fowler, G.W. Bourdôt, A.S. McClay, and G.R. Edwards. 2011. Classical biological control of Cirsium arvense: lessons from the past. Biological Control 57: 165-174.
- Piper, G.L. and E.M. Coombs. 2004. Thistles. In E.M. Coombs, J.K. Clark, G.L. Piper, and A.F. Cofrancesco, Eds. Biological Control of Invasive Plants in the United States. Oregon State University Press, Corvallis, Oregon. pp. 345-378.

Weed Origin References:
- Cripps, M.G., A. Gassmann, S.V. Fowler, G.W. Bourdôt, A.S. McClay, and G.R. Edwards. 2011. Classical biological control of Cirsium arvense: lessons from the past. Biological Control 57: 165-174.

Release and Source Information

List: 2 - Native Organisms Intentionally Redistributed

Source: Ex. USA (WY)
Year: 1984
Region: North America
Country: United States of America
Subregion of Country: WY
Subregion specific:

Release History: WY 1984

Release Notes:

Source Information References:
- Baker, L. 1997. (personal communication) Fremont County Weed and Pest, Lander, Wyoming, United States of America.

Original Host Species

Cirsium arvense (L.) Scop.

Original Host Species References:
- Baker, L. 1997. (personal communication) Fremont County Weed and Pest, Lander, Wyoming, United States of America.

Establishment

Established: Yes
Established in Subregion of Country: WY
Established in Subregion specific:

Establishment References:
- Baker, L. 1997. (personal communication) Fremont County Weed and Pest, Lander, Wyoming, United States of America.

Abundance

Unknown

Agent Impact

Impact: Heavy
Geographic Scale of impact: Localized
Impact Notes: Feeding observed to stunt or kill Cirsium arvense shoots when populations high. Attack on native Cirsium spp. precludes applied utilization of Corythucha distincta as biocontrol agent.

Impact References:
- Baker, L. 1997. (personal communication) Fremont County Weed and Pest, Lander, Wyoming, United States of America.
- Hansen, R. and C. Southwick. 2010. Biological control of Canada thistle. In CPHST Biological Control Unit 2010 Annual Report. USDA APHIS PPQ. pp. 1-4.

Limiting Factors

None

Other Attack

Were other species attacked?: Yes
Other Species Attacked Notes: Regularly attacks numerous native Cirsium spp. Causes lesser damage to other exotic thistle species.

Non-Target References:
- Hansen, R. and C. Southwick. 2010. Biological control of Canada thistle. In CPHST Biological Control Unit 2010 Annual Report. USDA APHIS PPQ. pp. 1-4.

Research Organizations

University of Wyoming, Laramie (State (13))

Notes