References of "Nguyen, Bach Kim"
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See detailCalculating and Reporting Managed Honey Bee Colony Losses
vanEngelsdorp, Dennis; Brodschneider, Robert; Brostaux, Yves ULiege et al

in Yoder, Jay (Ed.) Honey Bee Colony Health (2011)

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See detailHoney bee colony losses in Belgium during the 2008-9 winter
Nguyen, Bach Kim ULiege; Mignon, Jacques ULiege; Laget, Dries et al

in Journal of Apicultural Research (2010), 49(4), 337-339

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See detailAssociation des approches morphologique et moléculaire pour l’identification des vers à soies endémiques de Madagascar (Lasiocampidae, Borocera cajani)
Rakotondramanana, Alihasina; Nguyen, Bach Kim ULiege; Verheggen, François ULiege et al

Poster (2010, July)

La soie est une matière utilisée par les Malgaches depuis bien avant la colonisation. Cette soie est fabriquée à partir de la collecte de cocons des papillons du genre Borocera spp., ver à soie sauvage ... [more ▼]

La soie est une matière utilisée par les Malgaches depuis bien avant la colonisation. Cette soie est fabriquée à partir de la collecte de cocons des papillons du genre Borocera spp., ver à soie sauvage. On connaît une dizaine d’espèces de vers à soie sauvages endémiques à Madagascar. Ces lépidoptères polyphages se nourrissent surtout des feuilles de Uapaca bojeri et d’autres plantes telles que Dodonea madagascariensis et Psidium guyava. Les critères morphologiques se révèlent insuffisant pour identifier cette diversité d’espèces de vers à soie, surtout au niveau des stades immatures. Afin de pallier à cette incapacité d’identifier les espèces, des méthodes de marqueurs moléculaires, en particulier la RAPD (Random Amplified Polymorphic DNA) et iSSR (inter Simple Sequence Repeat), ont été appliquées. En plus de l’identification des espèces, une étude de la diversité et de la distribution des vers à soie suite à la collecte dans plusieurs forêts éloignées de plusieurs de kilomètres les unes des autres (Arivonimamo, Ambatofinandrahana, Antananarivo). Cette étude a été menée dans le cadre de la conservation de ces espèces de vers à soie endémiques en milieu. Afin d’augmenter durablement les populations de vers à soie endémiques dans les forêts de Uapaca, il est important de déterminer les espèces en présence et les capacités de dispersion de ces dernières. Les techniques d’identification moléculaires développées permettront d’orienter les stratégies de gestion des populations de Borocera et des méthodes de gestion de l’écosystème, appropriables par les gestionnaires et les communautés locales des la forêt à Uapaca bojeri. [less ▲]

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See detailLe point sur les causes des pertes d'abeilles domestiques en Région Wallonne
Nguyen, Bach Kim ULiege; Mignon, Jacques ULiege; Widart, Joëlle ULiege et al

Conference given outside the academic context (2010)

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See detailRéponses aux questions que l'on se pose sur la mortalité des abeilles domestiques en Belgique
Nguyen, Bach Kim ULiege; Mignon, Jacques ULiege; Saegerman, Claude ULiege et al

Conference given outside the academic context (2010)

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See detailA survey of honey bee colony losses in Belgium, fall 2008 to spring 2009
Nguyen, Bach Kim ULiege; Mignon, Jacques ULiege; Laget, D. et al

Conference (2010)

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See detailWeignhing risk factors associated with bee colony collapse disorder by classification and regression tree analysis
Vanengelsdorp, D.; Speybroeck, N.; Evans, J. et al

Poster (2010)

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See detailColoss Working Group 1: monitoring and diagnosis.
Nguyen, Bach Kim ULiege; Van der zee, Romée; Vejsnaes, Flemming et al

in Journal of Apicultural Research (2010), 49(1), 97-99

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See detailWeighing risk factors associated with bee Colony Collapse Disorder by classification and regression tree Analysis
vanEngelsdorp, D.; Speybroeck, N.; Evans, J. et al

in Journal of Economic Entomology (2010)

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See detailLes abeilles ne se cachent pas pour mourir
Nguyen, Bach Kim ULiege; Mignon, Jacques ULiege; Haubruge, Eric ULiege

Conference given outside the academic context (2009)

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See detailExploratory evaluation of the influence of honey bee colonies on Brassica napus L.
Nguyen, Bach Kim ULiege; Quievy, Samuel; Mignon, Jacques ULiege

Poster (2009, September 16)

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See detailBee monitoring level 3
Nguyen, Bach Kim ULiege; Mignon, Jacques ULiege; Haubruge, Eric ULiege

Poster (2009, September 14)

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See detailDoes Imidacloprid Seed-Treated Maize Have an Impact on Honey Bee Mortality?
Nguyen, Bach Kim ULiege; Saegerman, Claude ULiege; PIRARD, Catherine ULiege et al

in Journal of Economic Entomology (2009), 102(2), 616-623

Beekeepers suspected maize. Zea mays L., treated with imidacloprid to result in substantial loss of honey bee (Hymenoptera: Apidae) colonies in Belgium. The objective of this study was to investigate the ... [more ▼]

Beekeepers suspected maize. Zea mays L., treated with imidacloprid to result in substantial loss of honey bee (Hymenoptera: Apidae) colonies in Belgium. The objective of this study was to investigate the potential impact of maize grown from imidacloprid-treated seeds on honey bee mortality. A survey of 16 apiaries was carried out, and all maize fields treated or not with imidacloprid were located within a radius of 3,000 m around the observed apiaries. Samples of honey, beeswax, and bees were collected in three colonies per apiary and analyzed for pesticide contain by liquid chromatography-tandem mass spectrometry and gas chromatography-tandem mass spectrometry. We first found significant correlation between the number of colonies per apiary and the mortality rates in an apiary. In addition, this mortality rate was inversely correlated with the surface of maize fields treated and not with imidacloprid, suggesting that this pesticide do not interact with bees fitness. Moreover, a very large number of our samples contained acarcides either prohibited or ineffective against varroa destructor (Anderson & Trueman) (Acari: Varroidae), suggesting that the treatment method used by the beekeepers to be inadequate for mite control. Our results support the hypothesis that imidacloprid seed-treated maize has no negative impact on honey bees. [less ▲]

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See detailBelgian beekeeping situation and the symptomatology as discriminatory tools
Nguyen, Bach Kim ULiege; Mignon, Jacques ULiege; Haubruge, Eric ULiege

in Proceedings of the 4th Coloss Conference - Prevention of honey bee losses. COLOSS. Zagreb 3-4 March. abstract book p.8 (2009)

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See detailColony collapse disorder: a descriptive study.
Vanengelsdorp, Dennis; Evans, Jay D; Saegerman, Claude ULiege et al

in PLoS ONE (2009), 4(8), 6481

BACKGROUND: Over the last two winters, there have been large-scale, unexplained losses of managed honey bee (Apis mellifera L.) colonies in the United States. In the absence of a known cause, this ... [more ▼]

BACKGROUND: Over the last two winters, there have been large-scale, unexplained losses of managed honey bee (Apis mellifera L.) colonies in the United States. In the absence of a known cause, this syndrome was named Colony Collapse Disorder (CCD) because the main trait was a rapid loss of adult worker bees. We initiated a descriptive epizootiological study in order to better characterize CCD and compare risk factor exposure between populations afflicted by and not afflicted by CCD. METHODS AND PRINCIPAL FINDINGS: Of 61 quantified variables (including adult bee physiology, pathogen loads, and pesticide levels), no single measure emerged as a most-likely cause of CCD. Bees in CCD colonies had higher pathogen loads and were co-infected with a greater number of pathogens than control populations, suggesting either an increased exposure to pathogens or a reduced resistance of bees toward pathogens. Levels of the synthetic acaricide coumaphos (used by beekeepers to control the parasitic mite Varroa destructor) were higher in control colonies than CCD-affected colonies. CONCLUSIONS/SIGNIFICANCE: This is the first comprehensive survey of CCD-affected bee populations that suggests CCD involves an interaction between pathogens and other stress factors. We present evidence that this condition is contagious or the result of exposure to a common risk factor. Potentially important areas for future hypothesis-driven research, including the possible legacy effect of mite parasitism and the role of honey bee resistance to pesticides, are highlighted. [less ▲]

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See detailMortalités, effondrements et affaiblissements des colonies d'abeilles
Toma, Bernard; Alix, Anne; Carpentier, P. et al

Report (2009)

Detailed reference viewed: 72 (15 ULiège)
See detailLe dépérissement des abeilles
Nguyen, Bach Kim ULiege; Haubruge, Eric ULiege

Conference given outside the academic context (2009)

Detailed reference viewed: 56 (22 ULiège)