Eur. J. Entomol. 108 (3): 487-488, 2011 | DOI: 10.14411/eje.2011.062

Parasitylenchus sp. (Tylenchomorpha: Allantonematidae) parasitizing field populations of Harmonia axyridis (Coleoptera: Coccinellidae)

Susanne HARDING1, George O. POINAR2, Desislava V. DIMITROVA1, Tove STEENBERG3
1 University of Copenhagen, Department of Agriculture and Ecology, Thorvaldsensvej 40, 1875 Frederiksberg C. (Copenhagen) DK - Denmark; e-mail: suha@life.ku.dk
2 Oregon State University, Department of Zoology, 3029 Cordley Hall, Corvallis, Oregon 97331-2914; e-mail: poinarg@science.oregonstate.edu
3 University of Aarhus, Department of Integrated Pest Management, Research Centre Flakkebjerg, ForsIgsvej 1,
4 200 Slagelse, DK - Denmark; e-mail: tove.steenberg@agrsci.dk

Adults of the invasive harlequin ladybird, Harmonia axyridis (Coleoptera: Coccinellidae), were found to be parasitized by nematodes (Tylenchomorpha: Allantonematidae) in Denmark. The nematodes were identified as Parasitylenchus sp. Major morphological characters of the nematodes did not differ significantly from Parasitylenchus coccinellinae Iperti & van Waerebeke 1968, but minor deviations in egg dimension and tail length were measured. Parasitism was only recorded in early autumn, with prevalence ranging from 2 to 33%. Adult and juvenile nematodes occurred together in the body cavity of both female and male H. axyridis.

Keywords: Coccinellidae, Harmonia axyridis, parasitic nematodes, Allantonematidae, Parasitylenchus sp., field parasitism, invasive species

Received: June 28, 2010; Accepted: December 22, 2010; Published: July 1, 2011

Download citation

References

  1. BROWN P.M.J., ADRIAENS T., BATHON H., CUPPEN J., GOLDARAZENA A., HAGG T., KENIS M., KLAUSNITZER B.E.M., KOVAR I., LOOMANS A.J.M., MAJERUS M.E.N., NEDVED O., PEDERSEN J., RABITSCH W., ROY H.E., TERNOIS V., ZAKHAROV I.A. & ROY D.B. 2008: Harmonia axyridis in Europe: spread and distribution of a non-native ladybird. BioControl 53: 5-21 Go to original source...
  2. CERYNGIER P. & HODEK I. 1996: Enemies of Coccinellidae. In: Hodek I. & Honek A. (eds): Ecology of Coccinellidae. Kluwer Academic Publishers, Dordrecht, pp. 319-350 Go to original source...
  3. COTTRELL T.E. & SHAPIRO-ILAN D.I. 2009: Naturally occurring pathogens and invasive arthropods. In Hajek A.E., Glare T.R. & O'Callaghan M. (eds): Use of Microbes for Control and Eradication of Invasive Arthropods. Springer Science + Business Media B.V., pp. 19-32
  4. IPERTI G. 1964: Les parasites des coccinelles aphidiphages des les Alpes-Maritimes et les Basses-Alpes. Entomophaga 9: 153-180 Go to original source...
  5. IPERTI G. & VAN WAEREBEKE D. 1968: Description, biologie et importance d'une nouvelle espece d'Allantonematidae (Nematoda), parasite des coccinelles aphidiphages: Parasitylenchus coccinellinae, n. sp. Entomophaga 13: 107-119 Go to original source...
  6. KUZNETSOV V.N. 1997: Lady Beetles of the Russian Far East. Memoir No. 1, Center for Systematic Entomology. The Sandhill Crane Press, Gainesville, 248 pp
  7. KOCH R.L. & GALVAN T. L. 2008: Bad side of a good beetle: the North American experience with Harmonia axyridis. BioControl 53: 23-35 Go to original source...
  8. NARSI REDDY Y. & NARAYAN RAO P. 1984: First report of Parasitylenchus coccinellinae Iperti and Waerebeke (1968) from India in two new hosts Menochilus sexmaculatus (F) and Illeis indica Timb. Riv. Parassitol. 45: 133-137
  9. ROY H.E. & COTTRELL T.E. 2008: Forgotten natural enemies: Interactions between coccinellids and insect-parasitic fungi. Eur. J. Entomol. 105: 391-398 Go to original source...
  10. STEENBERG T. & HARDING S. 2009: Entomopathogenic fungi recorded from the harlequin ladybird, Harmonia axyridis. J. Invert. Pathol. 102: 88-89 Go to original source...
  11. STEENBERG T. & HARDING S. 2010: The harlequin ladybird (Harmonia axyridis Pallas) in Denmark: spread, phenology, colour forms and natural enemies in the early phase of establishment. IOBC/WPRS Bull. 58: 143-147