European Journal of Entomology (2006) 103, 365-370

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L. Volter and M. Kenis (2006)
Parasitoid complex and parasitism rates of the horse chestnut leafminer, Cameraria ohridella (Lepidoptera: Gracillariidae) in the Czech Republic, Slovakia and Slovenia
European Journal of Entomology 103 (2), 365-370
Abstract: The horse chestnut leaf miner, Cameraria ohridella Deschka and Dimiæ, is a species of unknown origin that recently invaded most of Europe, causing serious damage to horse chestnut trees, Aesculus hippocastanum. Parasitism was studied over a period of three years in the region of Plzeò in the Czech Republic. Additional collections were made in Slovakia and Slovenia. The parasitoid complex, dominated by polyphagous idiobiont parasitoids of the family Eulophidae, is similar to that found in other studies in Europe. Minotetrastichus frontalis (Nees) was the most abundant parasitoid found, except in Slovakia where Pediobius saulius (Walker) dominated. One parasitoid species, the eulophid Cirrospilus diallus (Walker) was recorded for the first time from C. ohridella. A new method is proposed to calculate stage-specific and total parasitism rates. Parasitism rates of spinning larvae and pupae were higher than of feeding larvae; however, total parasitism was low. We estimated that between 1% and 17% of moths died from parasitism during the larval and pupal stages whereas the rate of mortality caused by other factors varied from 7% to 62%, depending on the locality, year and generation. The proposed method for calculating total parasitism, based on the integration of stage-specific parasitism rates, which takes into account the mortality not directly attributed to parasitism, is discussed and compared with other methods commonly used in studies on C. ohridella.
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Full text of article
Database assignments for author(s): Lubomir Volter, Marc Kenis

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovakia
Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovenia
Pnigalio agraules (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Pnigalio agraules (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovenia
Cirrospilus diallus (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovenia
Cirrospilus vittatus (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Chrysocharis nitetis (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Pnigalio pectinicornis (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Scambus annulatus (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Itoplectis alternans (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Closterocerus trifasciatus (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Closterocerus trifasciatus (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovakia
Closterocerus trifasciatus (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovenia
Chrysocharis nephereus (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Minotetrastichus frontalis (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic
Minotetrastichus frontalis (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovakia
Minotetrastichus frontalis (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovenia
Pediobius saulius (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovakia
Pediobius saulius (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Slovenia
Colastes braconius (parasitoid) Cameraria ohridella Horse-chestnut/buckeye (Aesculus) Czech Republic