Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-05T17:00:31.907Z Has data issue: false hasContentIssue false
  • English
  • Français

Demographic studies of Oomyzus incertus (Hymenoptera: Eulophidae), a larval parasitoid of Hypera postica (Coleoptera: Curculionidae), treated with four organophosphorous insecticides

Published online by Cambridge University Press:  02 April 2012

Qodrat Sabahi  and
Khalil Talebi
Qodrat Sabahi
Affiliation:
Plant Pest and Disease Research Institute, Tehran 1454, Iran
Khalil Talebi*
Affiliation:
Plant Protection Department, Agricultural Faculty, Tehran University, Karaj 31585, Iran
*
1Corresponding author (e-mail: [email protected]).
Get access Rights & Permissions [Opens in a new window]

Extract

The alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae), can severely damage the first cutting of alfalfa, Medicago sativa L. (Fabaceae), in much of Iran. The pest has been parasitized by several parasitoids including Oomyzus incertus (Ratzeburg) (Hymenoptera: Eulophidae), a gregarious larval endoparasitoid. This wasp can parasitize up to 30% of weevil larvae in alfalfa fields in northern Iran. It produces three to four generations per year, and the female prefers the fourth instar of the host for oviposition. Each female lays 2 to 22 eggs per host, which hatch within 47–60 h. The life cycle is completed in about 2 weeks, upon pupation inside the host. This species is predominantly present during the summer months in alfalfa fields (Streams and Fuester 1967).

Type
Articles
Information
The Canadian Entomologist , Volume 137 , Issue 4 , August 2005 , pp. 488 - 491
Copyright
Copyright © Entomological Society of Canada 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Allan, J.D., and Daniels, R.E. 1982. Life table evaluation of chronic exposure of Eurytoma affinis to kepone. Marine Biology, 66: 179–184.CrossRefGoogle Scholar
Bechmann, R.K. 1994. Use of life tables and LC50 tests to evaluate chronic and acute toxicity effects of copper in the marine copepod Tisbe furcat. Environmental Toxicology and Chemistry, 13: 1509–1517.CrossRefGoogle Scholar
Bellows, T.S. Jr., Van Driesche, R.G., and Elkinton, J.S. 1992. Life-table construction and analysis in the evaluation of natural enemies. Annual Review of Entomology, 37: 587–614.CrossRefGoogle Scholar
Daniels, R.E., and Allan, J.D. 1981. Life table evaluation of chronic exposure to a pesticide. Canadian Journal of Fisheries and Aquatic Sciences, 38: 485–494.CrossRefGoogle Scholar
Landahl, J.T., and Root, R.B. 1969. Differences in the life tables of tropical and temperate milkweed bugs, genus Oncopeltus (Hemiptera: Lyggaeidae). Ecology, 50: 734–737.CrossRefGoogle Scholar
Maia, A.H.N., Luiz, A.J.B., and Campanhola, C. 2000. Statistical inference on associated fertility life table parameters using the jackknife technique: computational aspects. Journal of Economic Entomology, 93: 511–518.CrossRefGoogle ScholarPubMed
Pitcairn, M.J., and Gutierrez, A.P. 1992. Influence of adult size and age on the fecundity and longevity of Tetrastichus incertus (Hymenoptera: Eulophidae). Annals of the Entomological Society of America, 85: 53–57.CrossRefGoogle Scholar
SAS Institute Inc. 1989. SAS/STAT® user's guide. Vol. 2. Version 6. 4th ed. SAS Institute Inc., Cary, North Carolina.Google Scholar
Stark, J.D., Banken, J.A.O., and Walthall, W.K. 1998. The importance of the population perspective forthe evaluation of side effects of pesticides on beneficial species. In Ecotoxicology. Pesticides and beneficial organisms. Edited by Haskell, P.T. and McEwen, P.. Kluwer Academic Publishing, Dordrecht. pp. 348–359.CrossRefGoogle Scholar
Streams, F.A., and Fuester, R.W. 1967. Biology and distribution of Tetrastichus incertus, a parasite of the alfalfa weevil. Journal of Economic Entomology, 60: 1574–1579.CrossRefGoogle Scholar