Cezayir'de uğur böceği Harmonia axyridis'in (Pallas, 1773) (Coleoptera: Coccinellidae) dağılımı ve açık alan yetiştiriciliğinde yaşam öyküsü parametreleri
Year 2025,
Volume: 49 Issue: 3, 279 - 290, 30.09.2025
Mohamed Amin Lakhal
,
Faiza Marniche
,
Salaheddine Doumandji
,
Şükran Oğuzoğlu
,
Oldrich Nedved
Abstract
İstilacı uğur böceği Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) Cezayir'in çeşitli bölgelerinde kaydedilmiştir. Çalışmanın amacı lokasyon, tarih, konukçu bitki ve av türleri hakkında detaylı veri sağlamaktır. Daha önce yayınlanmayan dağılım 2017-2021 yılları arasındaki kayıtları içermektedir. Konukçu bitki olarak Harmonia axyridis yabani otsu bitkileri, süs çalılarını, meyve ağaçlarını, yaprak dökmeyen bir ağacı ve bir sebzeyi kullanmış, ancak kozalaklı ağaçları kullanmamıştır. Örnekleme tarihleri yılın çoğunu kapsamaktadır, çoğu gözlem 500 m'ye kadar olan kıyı ovalarında yapılmıştır. İkinci amaç, 2018 sonbaharında El Harrach bölgesinde (orta kıyı Cezayir) dış mekânda H. axyridis'in gelişim süresini, hayatta kalmasını, doğurganlığını ve yumurtlama ilerlemesini ölçmektir. Yaşam öyküsü parametreleri dış mekân koşullarında günlük ortalama sıcaklıklarla ilişkilendirilmiştir. Ortalama gelişme süresi (yumurtadan ergine) 40,3±1,6 gün sürmüştür. Bireysel larva dönemlerinin gelişim süreleri 1:1,42:2,95:3,63 oranı olarak ifade edilen artan değerler gösterdi, maksimum günlük fertilite 19 ila 21 yumurta arasında dalgalanmış; ancak, ortalama günlük sıcaklıklar 15°C'nin altına düştüğünde durmuştur.
Supporting Institution
Faculty of Science and Technology of the University of Tissemsilt; Algerian Ministry of Higher Education and Scientific Research
Thanks
This study was supported by the Faculty of Science and Technology of the University of Tissemsilt to first author (Lakhal Mohamed Amin) as part of a short-term mobility program for advanced training abroad established by the Algerian Ministry of Higher Education and Scientific Research in accordance with the ministerial decree of December 25, 2011, amending the interministerial decree of May 17, 2004.
References
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Angelidou, I., J. Demetriou, M. Christou, E. Koutsoukos, C. Kazilas, P. Georgiades, K. Kalaentzis, D. C. Kontodimas, Q. Groom, H. E. Roy & A. F. Martinou, 2023. Establishment and spread of the invasive ladybird Harmonia axyridis (Coleoptera: Coccinellidae) in Greece: based on contributions from citizen scientists. Biological Invasions, 25 (3): 889-900.
-
Atoussi, S., I. Razkallah, R. Zebsa, Z. Bensakhri & M. Bara, 2023. Local community involvement as a fast and effective way of monitoring invasive species in developing countries. Journal of Wildlife and Biodiversity, 7 (4): 11-16.
-
Awad, M., P. Kalushkov, T. Nedvedova & O. Nedved, 2013. Fecundity and fertility of ladybird beetle Harmonia axyridis after prolonged cold storage. BioControl, 58 (5): 657-666.
-
Awad, M., R. Pialkova, D. Haelewaters & O. Nedved, 2023. Infection patterns of ladybird Harmonia axyridis (Coleoptera: Coccinellidae) by ectoparasitic microfungi and endosymbiotic bacteria. Journal of Invertebrate Pathology, 197 (2): 107887 (1-9).
-
Ben Halima-Kamel, M., L. Mdellel, S. Zouari & R. Adouani, 2018. Occurrence of Harmonia axyridis in Tunisia. Bulletin OEPP/EPPO Bulletin, 48 (2): 307-308.
-
Brown, M. W. & S. S. Miller, 1998. Coccinellidae (Coleoptera) in apple orchards of eastern West Virginia and the impact of invasion by Harmonia axyridis. Entomological News, 109 (1): 143-151.
-
Brown, M., 2003. Intraguild responses of aphid predators on apple to the invasion of an exotic species, Harmonia axyridis. BioControl, 48 (2): 141-153.
-
Brown, P. M., C. E. Thomas, E. Lombaert, D.L Jeffries, A. Estoup & L. J. L. Handley, 2011. The global spread of Harmonia axyridis (Coleoptera: Coccinellidae): distribution, dispersal and routes of invasion. BioControl, 56 (4): 623-641.
-
Ceryngier, P., 2000. Overwintering of Coccinella septempunctata (Coleoptera: Coccinellidae) at different altitudes in the Karkonosze Mts, SW Poland. European Journal of Entomology, 97 (3): 323-328.
-
Chakir, R., M. David, E. Gozlan & A. Sangare, 2016. Valuing the impacts of an invasive biological control agent: a choice experiment on the Asian ladybird in France. Journal of Agricultural Economy, 67 (3): 619-638.
-
Chen, P., J. Liu, B. J. Chi, D. C. Li, J. Y. Li & Y. J. Liu, 2020. Effect of different diets on the growth and development of Harmonia axyridis (Pallas). Journal of Applied Entomology, 144 (10): 911-919.
-
Cisneros-Heredia, D. F. & E. Peñaherrera-Romero, 2020. Invasion history of Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) in Ecuador. PeerJ, 8 (1): e10461.
-
De Oliveira Ramos, T., T. dos Santos-Cividanes, F. Cividanes & L. dos Santos, 2014. Harmonia axyridis Pallas (Coleoptera: Coccinellidae): Biological aspects and thermal requirements. Advances in Entomology, 2 (1): 42-46.
-
Fiedler, L. & O. Nedved, 2019. Fifty shades of the harlequin ladybird and a sexually transmitted fungus. Journal of Insect Science, 19 (6): 10 (1-7).
-
Hiller, T. & D. Haelewaters, 2019. A case of silent invasion: Citizen science confirms the presence of Harmonia axyridis (Coleoptera, Coccinellidae) in Central America, PlosONE 14: e0220082 (1-16).
-
Hodek, I., 1996. “Food Relationships, 143-238”. In: Ecology of Coccinellidae (Eds. I. Hodek & A. Honĕk). Kluwer Academic Publishers, Dordrecht, 464 pp.
-
Hodek, I. & A. Honek, 1996. Ecology of Coccinellidae. Kluwer Academic Publishers, Dordrecht, Boston, London, 464 pp.
-
Hodek, I., 2012. “Diapause/Dormanc, 54-109”. In: Ecology and Behaviour of the Ladybird Beetles (Coccinellidae) (Eds. I. Hodek, H. F. Van Emden & A. Honěk). Wiley-Blackwell, Oxford, United Kingdom, 561 pp.
-
Honěk, A. P. M., J Brown, Z. Martinkova, J. Skuhrovec, M. Brabec, G. Burgio, E.W. Evans, M. Fournier, A. A.Grez, J. Kulfan, F. Lami, E. Lucas, B. Lumbierres, A. Masetti, T. Mogilevich, M. Orlova-Bienkowskaja, W. M. Phillips, X. Pons, J. Strobach, S. Viglasova, P. Zach & T. Zaviezo, 2020. Factors determining variation in colour morph frequencies in invasive Harmonia axyridis populations. Biological Invasions, 22 (6): 2049-2062.
-
Jarošík, V., L. Kratochvíl, A. Honěk & A. F. Dixon, 2004. A general rule for the dependence of developmental rate on temperature in ectothermic animals. Proceedings of the Royal Society B: Biological Sciences, 271 (Suppl_4): S219-S221.
-
Kindlmann, P., H. Yasuda, S. Sato & K. Shinya, 2000. Key life stages of two predatory ladybird species (Coleoptera: Coccinellidae). European Journal of Entomology, 97 (4): 495-499.
-
Koch, R. L., 2003. The multicolored Asian lady beetle, Harmonia axyridis: A review of its biology, uses in biological control, and non-target impacts. Journal of Insect Science, 3 (1): 1-16.
-
Koch, R. L. & A. C. Costamagna, 2017. Reaping benefits from an invasive species: role of Harmonia axyridis in natural biological control of Aphis glycines in North America. Biocontrol, 62 (3): 331-340.
-
Kontodimas, D. C., G. J. Stathas & A. F. Martinou, 2008. The aphidophagous predator Harmonia axyridis (Coleoptera: Coccinellidae) in Greece, 1994-1999. European Journal of Entomology, 105 (3): 541-544.
-
Lakhal, M. A., D. Ghezali, O. Nedved & S. Doumandji, 2018. Checklist of ladybirds of Algeria with two new recorded species (Coleoptera, Coccinellidae). ZooKeys, 774 (23): 41-52.
-
Lami, F., A. Masetti, U. Neri, M. Lener, G. Staiano, S. Arpaia & G. Burgio, 2016: Diversity of Coccinellidae in Ecological Compensation Areas of Italy and overlap with maize pollen shedding period. Bulletin of Insectology. 69 (1): 49-57.
-
Majerus, M. E. N. & G. D. D. Hurst, 1997. Ladybirds as a model system for the study of male-killing symbionts. Entomophaga, 42 (1-2): 13-20.
-
Michaud, J. P., 2001. Numerical response of Olla v-nigrum (Coleoptera: Coccinellidae) to infestations of Asian Citrus Psyllid, (Hemiptera: Psyllidae) in Florida. Florida Entomologist, 84 (4): 608-612.
-
Michaud, J. P., 2002. Biological control of Asian citrus psyllid, Diaphorina citri (Hemiptera: Psyllidae) in Florida: a preliminary report. Entomological News, 113 (3): 216-222.
-
Michie, L. J., F. Mallard, M. E. N. Majerus & F. M. Jiggins, 2010. Melanic through nature or nurture: genetic polymorphism and phenotypic plasticity in Harmonia axyridis. Journal of Evolutionary Biology, 23 (8): 1699-170.
-
Milléo, J., F. S. Fernandes & W. A. C. Godoy, 2014. Comparative demography of the exotic Harmonia axyridis with other aphidophagous coccinellids reared on artificial diet. Pesquisa Agropecuária Brasileira, 49 (1): 1-10.
-
Mizell, R. F., 2007. Impact of Harmonia axyridis (Coleoptera: Coccinellidea) on native arthropod predators on pecan and crape myrtle. Florida Entomologist, 90 (3): 524-536.
-
Nedvěd, O., 1993. Comparison of cold hardiness in two ladybird beetles (Coleoptera: Coccinellidae) with contrasting hibernation behaviour. European Journal of Entomology, 90 (4): 465-470.
-
Nedvěd, O., J. Háva & D. Kulíková, 2011. Record of the invasive alien ladybird Harmonia axyridis (Coleoptera, Coccinellidae) from Kenya. ZooKey, 106 (6): 77-81.
-
Nedvěd, O. & A. Honěk, 2012. “Life History and Development, 54-109”. In: Ecology and Behaviour of the Ladybird Beetles (Coccinellidae) (Eds. I. Hodek, H. F. Van Emden & A. Honěk). Wiley-Blackwell, Oxford, United Kingdom, 561 pp.
-
Nedvědová, T., M. Awad, D. Ungerová & O. Nedvěd, 2013. Characteristics of ladybird Harmonia axyridis during autumn migration. International Organisation for Biological and Integrated Control Bulletin, 94 (1): 117-122.
-
Niedobová, J., M. Skalský, Z. F. Fric, V. Hula & M. Brtnický, 2019. Effects of so-called “Environmentally Friendly” agrochemicals on the harlequin ladybird Harmonia axyridis (Coleoptera: Coccinelidae). European Journal Entomology, 116 (1): 173-177.
-
O’Hearn, J. S., 2024. Harmonia axyridis (Coleoptera: Coccinellidae) aggregation in underground artificial overwintering sites. Journal of Entomological Science, 59 (2): 211-215.
-
Ramos, T.O., T. M. Santos-Cividanes, F. J. Cividanes & L. C. Santos, 2014. Harmonia axyridis Pallas (Coleoptera: Coccinellidae): biological aspects and thermal requirements. Advances in Entomology, 2 (1): 42-46.
-
Roy, H. E., T. Adriaens, N. J. B. Isaac, M. Kenis, T. Onkelinx, G. S. Martin, P. M. J. Brown, L. Hautier, R. Poland, D. B. Roy, R. Comont, R. Eschen, R Frost, R. Zindel, J. Van Vlaenderen, O. Nedvěd, H. P. Ravn, J. C. Grégoire, J. C. de Biseau & D. Maes, 2012. Invasive alien predator causes rapid declines of native European ladybirds. Diversity and Distributions, 18 (7): 717-725.
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Distribution of the ladybird Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) in Algeria and life history parameters in outdoor rearing
Year 2025,
Volume: 49 Issue: 3, 279 - 290, 30.09.2025
Mohamed Amin Lakhal
,
Faiza Marniche
,
Salaheddine Doumandji
,
Şükran Oğuzoğlu
,
Oldrich Nedved
Abstract
The invasive ladybird Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) has been recorded in several regions in Algeria. The aim of the study was to provide detailed data on location, date, host plant and prey species. The previously unpublished distribution data include records from 2017 to 2021. As host plants, Harmonia axyridis utilized wild herbaceous plants, ornamental shrubs, fruit trees, an evergreen tree, and a vegetable, but no conifers. The sampling dates span most of the year, most observations were made in coastal lowlands up to 500 m. The second aim is to measure the developmental time, survival, fertility and progress of oviposition of H. axyridis in outdoor location in El Harrach region (central coastal Algeria) in autumn 2018. These life history parameters were related to the daily average temperatures under outdoor conditions. The average developmental time (egg to adult) was 40.3±1.6 days. The developmental times of individual larval instars showed increasing values expressed as ratio 1:1.42:2.95:3.63, The maximum daily fertility fluctuated between 19 and 21 eggs but ceased when mean daily temperatures dropped below 15°C.
Supporting Institution
Faculty of Science and Technology of the University of Tissemsilt; Algerian Ministry of Higher Education and Scientific Research
Thanks
This study was supported by the Faculty of Science and Technology of the University of Tissemsilt to first author (Lakhal Mohamed Amin) as part of a short-term mobility program for advanced training abroad established by the Algerian Ministry of Higher Education and Scientific Research in accordance with the ministerial decree of December 25, 2011, amending the interministerial decree of May 17, 2004.
References
-
Angelidou, I., J. Demetriou, M. Christou, E. Koutsoukos, C. Kazilas, P. Georgiades, K. Kalaentzis, D. C. Kontodimas, Q. Groom, H. E. Roy & A. F. Martinou, 2023. Establishment and spread of the invasive ladybird Harmonia axyridis (Coleoptera: Coccinellidae) in Greece: based on contributions from citizen scientists. Biological Invasions, 25 (3): 889-900.
-
Atoussi, S., I. Razkallah, R. Zebsa, Z. Bensakhri & M. Bara, 2023. Local community involvement as a fast and effective way of monitoring invasive species in developing countries. Journal of Wildlife and Biodiversity, 7 (4): 11-16.
-
Awad, M., P. Kalushkov, T. Nedvedova & O. Nedved, 2013. Fecundity and fertility of ladybird beetle Harmonia axyridis after prolonged cold storage. BioControl, 58 (5): 657-666.
-
Awad, M., R. Pialkova, D. Haelewaters & O. Nedved, 2023. Infection patterns of ladybird Harmonia axyridis (Coleoptera: Coccinellidae) by ectoparasitic microfungi and endosymbiotic bacteria. Journal of Invertebrate Pathology, 197 (2): 107887 (1-9).
-
Ben Halima-Kamel, M., L. Mdellel, S. Zouari & R. Adouani, 2018. Occurrence of Harmonia axyridis in Tunisia. Bulletin OEPP/EPPO Bulletin, 48 (2): 307-308.
-
Brown, M. W. & S. S. Miller, 1998. Coccinellidae (Coleoptera) in apple orchards of eastern West Virginia and the impact of invasion by Harmonia axyridis. Entomological News, 109 (1): 143-151.
-
Brown, M., 2003. Intraguild responses of aphid predators on apple to the invasion of an exotic species, Harmonia axyridis. BioControl, 48 (2): 141-153.
-
Brown, P. M., C. E. Thomas, E. Lombaert, D.L Jeffries, A. Estoup & L. J. L. Handley, 2011. The global spread of Harmonia axyridis (Coleoptera: Coccinellidae): distribution, dispersal and routes of invasion. BioControl, 56 (4): 623-641.
-
Ceryngier, P., 2000. Overwintering of Coccinella septempunctata (Coleoptera: Coccinellidae) at different altitudes in the Karkonosze Mts, SW Poland. European Journal of Entomology, 97 (3): 323-328.
-
Chakir, R., M. David, E. Gozlan & A. Sangare, 2016. Valuing the impacts of an invasive biological control agent: a choice experiment on the Asian ladybird in France. Journal of Agricultural Economy, 67 (3): 619-638.
-
Chen, P., J. Liu, B. J. Chi, D. C. Li, J. Y. Li & Y. J. Liu, 2020. Effect of different diets on the growth and development of Harmonia axyridis (Pallas). Journal of Applied Entomology, 144 (10): 911-919.
-
Cisneros-Heredia, D. F. & E. Peñaherrera-Romero, 2020. Invasion history of Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) in Ecuador. PeerJ, 8 (1): e10461.
-
De Oliveira Ramos, T., T. dos Santos-Cividanes, F. Cividanes & L. dos Santos, 2014. Harmonia axyridis Pallas (Coleoptera: Coccinellidae): Biological aspects and thermal requirements. Advances in Entomology, 2 (1): 42-46.
-
Fiedler, L. & O. Nedved, 2019. Fifty shades of the harlequin ladybird and a sexually transmitted fungus. Journal of Insect Science, 19 (6): 10 (1-7).
-
Hiller, T. & D. Haelewaters, 2019. A case of silent invasion: Citizen science confirms the presence of Harmonia axyridis (Coleoptera, Coccinellidae) in Central America, PlosONE 14: e0220082 (1-16).
-
Hodek, I., 1996. “Food Relationships, 143-238”. In: Ecology of Coccinellidae (Eds. I. Hodek & A. Honĕk). Kluwer Academic Publishers, Dordrecht, 464 pp.
-
Hodek, I. & A. Honek, 1996. Ecology of Coccinellidae. Kluwer Academic Publishers, Dordrecht, Boston, London, 464 pp.
-
Hodek, I., 2012. “Diapause/Dormanc, 54-109”. In: Ecology and Behaviour of the Ladybird Beetles (Coccinellidae) (Eds. I. Hodek, H. F. Van Emden & A. Honěk). Wiley-Blackwell, Oxford, United Kingdom, 561 pp.
-
Honěk, A. P. M., J Brown, Z. Martinkova, J. Skuhrovec, M. Brabec, G. Burgio, E.W. Evans, M. Fournier, A. A.Grez, J. Kulfan, F. Lami, E. Lucas, B. Lumbierres, A. Masetti, T. Mogilevich, M. Orlova-Bienkowskaja, W. M. Phillips, X. Pons, J. Strobach, S. Viglasova, P. Zach & T. Zaviezo, 2020. Factors determining variation in colour morph frequencies in invasive Harmonia axyridis populations. Biological Invasions, 22 (6): 2049-2062.
-
Jarošík, V., L. Kratochvíl, A. Honěk & A. F. Dixon, 2004. A general rule for the dependence of developmental rate on temperature in ectothermic animals. Proceedings of the Royal Society B: Biological Sciences, 271 (Suppl_4): S219-S221.
-
Kindlmann, P., H. Yasuda, S. Sato & K. Shinya, 2000. Key life stages of two predatory ladybird species (Coleoptera: Coccinellidae). European Journal of Entomology, 97 (4): 495-499.
-
Koch, R. L., 2003. The multicolored Asian lady beetle, Harmonia axyridis: A review of its biology, uses in biological control, and non-target impacts. Journal of Insect Science, 3 (1): 1-16.
-
Koch, R. L. & A. C. Costamagna, 2017. Reaping benefits from an invasive species: role of Harmonia axyridis in natural biological control of Aphis glycines in North America. Biocontrol, 62 (3): 331-340.
-
Kontodimas, D. C., G. J. Stathas & A. F. Martinou, 2008. The aphidophagous predator Harmonia axyridis (Coleoptera: Coccinellidae) in Greece, 1994-1999. European Journal of Entomology, 105 (3): 541-544.
-
Lakhal, M. A., D. Ghezali, O. Nedved & S. Doumandji, 2018. Checklist of ladybirds of Algeria with two new recorded species (Coleoptera, Coccinellidae). ZooKeys, 774 (23): 41-52.
-
Lami, F., A. Masetti, U. Neri, M. Lener, G. Staiano, S. Arpaia & G. Burgio, 2016: Diversity of Coccinellidae in Ecological Compensation Areas of Italy and overlap with maize pollen shedding period. Bulletin of Insectology. 69 (1): 49-57.
-
Majerus, M. E. N. & G. D. D. Hurst, 1997. Ladybirds as a model system for the study of male-killing symbionts. Entomophaga, 42 (1-2): 13-20.
-
Michaud, J. P., 2001. Numerical response of Olla v-nigrum (Coleoptera: Coccinellidae) to infestations of Asian Citrus Psyllid, (Hemiptera: Psyllidae) in Florida. Florida Entomologist, 84 (4): 608-612.
-
Michaud, J. P., 2002. Biological control of Asian citrus psyllid, Diaphorina citri (Hemiptera: Psyllidae) in Florida: a preliminary report. Entomological News, 113 (3): 216-222.
-
Michie, L. J., F. Mallard, M. E. N. Majerus & F. M. Jiggins, 2010. Melanic through nature or nurture: genetic polymorphism and phenotypic plasticity in Harmonia axyridis. Journal of Evolutionary Biology, 23 (8): 1699-170.
-
Milléo, J., F. S. Fernandes & W. A. C. Godoy, 2014. Comparative demography of the exotic Harmonia axyridis with other aphidophagous coccinellids reared on artificial diet. Pesquisa Agropecuária Brasileira, 49 (1): 1-10.
-
Mizell, R. F., 2007. Impact of Harmonia axyridis (Coleoptera: Coccinellidea) on native arthropod predators on pecan and crape myrtle. Florida Entomologist, 90 (3): 524-536.
-
Nedvěd, O., 1993. Comparison of cold hardiness in two ladybird beetles (Coleoptera: Coccinellidae) with contrasting hibernation behaviour. European Journal of Entomology, 90 (4): 465-470.
-
Nedvěd, O., J. Háva & D. Kulíková, 2011. Record of the invasive alien ladybird Harmonia axyridis (Coleoptera, Coccinellidae) from Kenya. ZooKey, 106 (6): 77-81.
-
Nedvěd, O. & A. Honěk, 2012. “Life History and Development, 54-109”. In: Ecology and Behaviour of the Ladybird Beetles (Coccinellidae) (Eds. I. Hodek, H. F. Van Emden & A. Honěk). Wiley-Blackwell, Oxford, United Kingdom, 561 pp.
-
Nedvědová, T., M. Awad, D. Ungerová & O. Nedvěd, 2013. Characteristics of ladybird Harmonia axyridis during autumn migration. International Organisation for Biological and Integrated Control Bulletin, 94 (1): 117-122.
-
Niedobová, J., M. Skalský, Z. F. Fric, V. Hula & M. Brtnický, 2019. Effects of so-called “Environmentally Friendly” agrochemicals on the harlequin ladybird Harmonia axyridis (Coleoptera: Coccinelidae). European Journal Entomology, 116 (1): 173-177.
-
O’Hearn, J. S., 2024. Harmonia axyridis (Coleoptera: Coccinellidae) aggregation in underground artificial overwintering sites. Journal of Entomological Science, 59 (2): 211-215.
-
Ramos, T.O., T. M. Santos-Cividanes, F. J. Cividanes & L. C. Santos, 2014. Harmonia axyridis Pallas (Coleoptera: Coccinellidae): biological aspects and thermal requirements. Advances in Entomology, 2 (1): 42-46.
-
Roy, H. E., T. Adriaens, N. J. B. Isaac, M. Kenis, T. Onkelinx, G. S. Martin, P. M. J. Brown, L. Hautier, R. Poland, D. B. Roy, R. Comont, R. Eschen, R Frost, R. Zindel, J. Van Vlaenderen, O. Nedvěd, H. P. Ravn, J. C. Grégoire, J. C. de Biseau & D. Maes, 2012. Invasive alien predator causes rapid declines of native European ladybirds. Diversity and Distributions, 18 (7): 717-725.
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