Results 31 to 40 of about 335 (161)

Cold tolerance of the harlequin ladybird Harmonia axyridis in Europe

Journal of Insect Physiology, 2010
As an essential aspect of its invasive character in Europe, this study examined the cold hardiness of the harlequin ladybird Harmonia axyridis. This was done for field-collected populations in Belgium overwintering either in an unheated indoor or an outdoor hibernaculum. The supercooling point, lower lethal temperature and lower lethal time at 0 and -5
Berkvens, N., Bale, J. S., Berkvens, D., Tirry, L., De Clercq, P.   +4 more
openaire   +4 more sources

Hybrid feature extractor for harlequin ladybird identification using color images [PDF]

2012 IEEE Symposium on Computational Intelligence in Bioinformatics and Computational Biology (CIBCB), 2012
This paper describes research into the automation of the identification of harlequin and other ladybird species using color images. The automation process involves image processing and the use of an artificial neural network as a classifier. The ultimate aim is to reduce the number of color images to be examined by an expert by pre-sorting the images ...
Ayob, Mohd Zaki Bin, Chesmore, David
openaire   +2 more sources

Repeated inversions within a pannier intron drive diversification of intraspecific colour patterns of ladybird beetles

Nature Communications, 2018
The harlequin ladybird beetle, Harmonia axyridis, has remarkable phenotypic diversity, with over 200 colour patterns. Here, Ando et al. show that this patterning is regulated by the transcription factor gene pannier and has diversified by repeated ...
Toshiya Ando, Takeshi Matsuda, Kumiko Goto, Kimiko Hara, Akinori Ito, Junya Hirata, Joichiro Yatomi, Rei Kajitani, Miki Okuno, Katsushi Yamaguchi, Masaaki Kobayashi, Tomoyuki Takano, Yohei Minakuchi, Masahide Seki, Yutaka Suzuki, Kentaro Yano, Takehiko Itoh, Shuji Shigenobu, Atsushi Toyoda, Teruyuki Niimi   +19 more
doaj   +1 more source

History of the Biodiversity of Ladybirds (Coccinellidae) at the Black Sea Coast of the Russian Caucasus in the Last 120 Years—Does the Landscape Transformation and Establishment of Harmonia axyridis Have an Impact?

Insects, 2020
Studies of the history of regional insect fauna are important for understanding the changes in ecosystems. We analyzed the dynamics of ladybird fauna at the main sea resort of Russia over a period of 120 years to determine the following: (1) what species
Andrzej O. Bieńkowski, Marina J. Orlova-Bienkowskaja   +1 more
doaj   +1 more source

Life history of the harlequin ladybird, Harmonia axyridis: a global meta-analysis [PDF]

BioControl, 2017
The harlequin ladybird, Harmonia axyridis, is an important natural enemy of aphids throughout the world, but is now also considered an invasive alien species. We performed a meta-analysis of published life history data to address the question whether invading populations in Europe and North America have life history parameters that differ from native ...
Raak-van den Berg, C.L., Hemerik, Lia, van der Werf, Wopke, de Jong, Peter W., van Lenteren, Joop C.   +4 more
openaire   +2 more sources

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

European Journal of Entomology, 2011
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.
Susanne HARDING, George O. POINAR, Desislava V. DIMITROVA, Tove STEENBERG   +3 more
doaj   +1 more source

Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review

European Journal of Entomology, 2013
Hesperomyces virescens is an ectoparasite of some Coccinellidae, which until the mid-1990s was relatively rarely only reported from warm regions in various parts of the world. Analysis of the host and distribution data of H.
Piotr CERYNGIER, Kamila TWARDOWSKA
doaj   +1 more source

Do atmospheric events explain the arrival of an invasive ladybird (Harmonia axyridis) in the UK?

PLoS ONE, 2020
Species introduced outside their natural range threaten global biodiversity and despite greater awareness of invasive species risks at ports and airports, control measures in place only concern anthropogenic routes of dispersal.
Pilvi Siljamo, Kate Ashbrook, Richard F Comont, Carsten Ambelas Skjøth   +3 more
doaj   +1 more source

Harmonia axyridis (Coleoptera: Coccinellidae): Smelling the rat in native ladybird declines

European Journal of Entomology, 2017
In the last two decades a huge amount of research has focused on the invasive harlequin ladybird, Harmonia axyridis, particularly on potential or actual deleterious effects that have arisen after it has colonised new regions.
John J. SLOGGETT
doaj   +1 more source

Insectum non grata: the harlequin ladybird, Harmoniaaxyridis (Pallas, 1773) (Coleoptera, Coccinellidae) in Turkey

TURKISH JOURNAL OF ZOOLOGY, 2021
The Harlequin Ladybird, Harmonia axyridis (Pallas, 1773), is native to Eastern Asia but it has been introduced to many countries in Africa, America, and Eurasia. In Turkey, H. axyridis is one of the most fast-spreading invasive alien species. Since the collection of the first specimens in 2010, H. axyridis spread almost all over the country.
Ahmet KARATAŞ, Ayşegül KARATAŞ, Nizamettin YAVUZ, Elif Deniz ÜLKER, Özgür KOÇAK, Burak AKBABA   +5 more
openaire   +1 more source