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Distinguishing adults of Bracon cephi and Bracon lissogaster (Hymenoptera: Braconidae), parasitoids of the wheat stem sawfly (Hymenoptera: Cephidae)1

Published online by Cambridge University Press:  31 May 2012

J.B. Runyon ,
R.L. Hurley ,
W.L. Morrill  and
D.K. Weaver
J.B. Runyon*
Affiliation:
Department of Entomology, Montana State University-Bozeman, Bozeman, Montana, United States 59717
R.L. Hurley
Affiliation:
Department of Entomology, Montana State University-Bozeman, Bozeman, Montana, United States 59717
W.L. Morrill
Affiliation:
Department of Entomology, Montana State University-Bozeman, Bozeman, Montana, United States 59717
D.K. Weaver
Affiliation:
Department of Entomology, Montana State University-Bozeman, Bozeman, Montana, United States 59717
*
2 Author to whom all correspondence should be addressed (E-mail: [email protected]).
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Extract

The wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), has been the most economically important insect pest of wheat in the northern Great Plains since cultivation began (Weiss and Morrill 1992). The wheat stem sawfly was first reported from wild grasses where populations were often highly parasitized by a number of parasitoids, including Bracon (= Microbracon) cephi (Gahan) (Hymenoptera: Braconidae) (Criddle 1923; Ainslie 1929). A similar species, Bracon lissogaster Muesebeck, was later reported to also attack C. cinctus larvae (Muesebeck 1953; Somsen and Luginbill 1956). These parasitoids are now prevalent in wheat in some regions of Montana (Morrill et al. 1994, 1998; Morrill 1997). The life histories and phenologies of these sympatric idiobiont ectoparasitoids are similar. The ability to distinguish B. cephi from B. lissogaster is essential in elucidating their effects on populations of C. cinctus. We examined 159 females and 123 males of B. cephi from Chouteau, Hill, Stillwater, Teton, and Toole counties in Montana; Burke, Burleigh, Rolette, and Williams counties in North Dakota; Rock County in Minnesota; and southem Alberta (Rockyford and Consort). The 254 females and 215 males of B. lissogaster examined were from Chouteau, Hill, Teton, and Toole counties in Montana. Holotypes were compared to verify identifications.

Type
Articles
Information
The Canadian Entomologist , Volume 133 , Issue 2 , April 2001 , pp. 215 - 217
Copyright
Copyright © Entomological Society of Canada 2001

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Footnotes

1

Contribution No.\-2000-68 of the Montana Agricultural Experiment Station.

References

Ainslie, C.N. 1929. The western grass-stem sawfly a pest of small grains. US Department of Agriculture Technical Bulletin 157Google Scholar
Criddle, N. 1923. The life habits of Cephus cinctus Nort. in Manitoba. The Canadian Entomologist 55: 1–4CrossRefGoogle Scholar
Gahan, A.B. 1918. Description of a new Hymenopterous parasite (Braconidae). Proceedings of the Entomological Society of Washington 20(1): 18–19Google Scholar
Krombein, K.V., Hurd, P.D. Jr, Smith, D.R., Burks, D.B. 1979. Catalog of Hymenoptera in America North of Mexico. Washington, DC: Smithsonian PressCrossRefGoogle Scholar
Morrill, W.L. 1997. The wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), and associated parasitoids in the northern Great Plains of North America. Trends in Entomology 1: 171–4Google Scholar
Morrill, W.L., Kushnak, G.D., Bruckner, P.L., Gabor, J.W. 1994. Wheat stem sawfly (Hymenoptera: Cephidae) damage, rates of parasitism, and overwinter survival in resistant wheat lines. Journal of Economic Entomology 87: 1373–6CrossRefGoogle Scholar
Morrill, W.L., Kushnak, G.D., Gabor, J.W. 1998. Parasitism of the wheat stem sawfly (Hymenoptera: Cephidae) in Montana. Biological Control 12: 159–63CrossRefGoogle Scholar
Muesebeck, C.F.W. 1953. Three new reared Braconidae. Proceedings of the Entomological Society of Washington 55(3): 149–51Google Scholar
Nelson, W.A., Farstad, C.W. 1953. Biology of Bracon cephi (Gahan) (Hymenoptera: Braconidae), an important native parasite of the wheat stem sawfly, Cephus cinctus Nort. (Hymenoptera: Cephidae), in western Canada. The Canadian Entomologist 85: 103–7CrossRefGoogle Scholar
Somsen, H.W., Luginbill, P. Jr 1956. Bracon lissogaster Mues., a parasite of the wheat stem sawfly. US Department of Agriculture Technical Bulletin 1153Google Scholar
Weiss, M.J., Morrill, W.L. 1992. Wheat stem sawfly (Hymenoptera: Cephidae) revisited. American Entomologist 39(4): 16–22Google Scholar
Wharton, R.A., Marsh, P.M., Sharkey, M.J. (Editors). 1997. Manual of the New World Genera of the Family Braconidae (Hymenoptera). Special Publication of the International Society of Hymenopterists 1Google Scholar