References of "Mignon, Jacques"
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See detailFreyr... dans la légende du café...
Mignon, Jacques ULg

in Toussaint, Jacques (Ed.) Freyr-sur-Meuse. Un patrimoine exceptionnel en province de Namur (2013)

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See detailPrincipal disease and Insect pests of Jatropha curcas L. in the lower valley of the Senegal river
Terren, Marieke ULg; Mignon, Jacques ULg; De Clerck, Caroline ULg et al

in Tropicultura (2012), 30(4), 222-229

Jatropha curcas L. seed oil is proven to be toxic to many microorganisms, insects and animals. Despite its toxicity, Jatropha is not pest and disease resistant. The following major pests and diseases ... [more ▼]

Jatropha curcas L. seed oil is proven to be toxic to many microorganisms, insects and animals. Despite its toxicity, Jatropha is not pest and disease resistant. The following major pests and diseases affecting Jatropha in the lower valley of the Senegal river have been identified: the leaf miner Stomphastis thraustica (Meyrick, 1908) (Lepidoptera, Gracillariidae), the leaf and stem miner Pempelia morosalis (Saalmuller, 1880) (Lepidoptera, Pyralidae) and the shield-backed bug Calidea panaethiopica (Kirkaldy, 1909) (Heteroptera, Scutelleridae), which can cause flower and fruit abortion. Damage from these pests was particularly great during the second year after the plantations were set up (2009) and before later receding. Nevertheless, the worst attacks were caused by a vascular disease transmitted through the soil, which killed 65% of the plants in four years. It is mainly characterised by collar and root rot, which causes foliage to yellow and wilt, before the plant eventually dies. These threats should increase if larger areas are planted with Jatropha. Considering the scale of the damage caused by these attacks in Bokhol, the development of an integrated pest management programme adapted to the local context should be considered. [less ▲]

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See detailEtude longitudinale de la motivation d'étudiants universitaires de 1ère année
Mignon, Jacques ULg

Doctoral thesis (2012)

This research is supported by socio-cognitive theories such as the self-determination theory (Deci & Ryan, 1985, 1991). It aims to study the relationship between gender, performance and academic ... [more ▼]

This research is supported by socio-cognitive theories such as the self-determination theory (Deci & Ryan, 1985, 1991). It aims to study the relationship between gender, performance and academic motivation of university students. The first part presents concepts and theories of motivation. Then, it looks at sex inequalities in motivation, especially at the university level. The second part begins with a presentation of the different types of motivation and the tool to measure them: the Motivation Scale in Education - University Studies (Vallerand et al. 1989). This section proposes four different surveys in the framework of the longitudinal study of the academic motivation, which was carried out on three successive cohorts in first year at university. The first exploration is devoted to the evolution of different types of motivatio n during the year. It confirms the existence of variations in the types of motivation and the influence of gender on these fluctuations. The second exploration uses correlation analysis to investigate reciprocal relationships between academic motivation and academic performances. The relationship between motivation and final performances are clearly established from December. Gender differences have been observed but significant variations between cohorts restrict the scope of the results. The third exploration consists of a group-based semiparametric method to estimate academic motivation trajectories. This original approach has confirmed some assumptions made by the self-determination theory of Deci and Ryan (1985). The final exploration of our collected data is based on the possibility to conduct multilevel analyses on repeated measurements. Surprisingly, neither the gender nor the performance of the students can explain the interindividual variance of motivation. Results are discussed with reference to the four different statistical devices used and to the strong cohort effect. [less ▲]

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See detailLes insectes et autres animaux dans nos bibliothèques, archives et collections: identification, biologie, prévention et élimination
Mignon, Jacques ULg

Scientific conference (2012, January 19)

Principaux critères d'identification et biologie des principaux insectes et rongeurs observés en bibliothèques et autres collections. Symptômes et dégâts observés. Prévention et lutte intégrée par le ... [more ▼]

Principaux critères d'identification et biologie des principaux insectes et rongeurs observés en bibliothèques et autres collections. Symptômes et dégâts observés. Prévention et lutte intégrée par le froid, l'anoxie et le vide. [less ▲]

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See detailPrimo v.3 en test dans le Réseau des Bibliothèques ULg. Premier retour sur la phase de test
Simon, Stéphanie ULg; Mignon, Jacques ULg; Rizzo, Sandra ULg et al

Conference given outside the academic context (2011)

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See detailMangerons-nous un jour des insectes ?
Haubruge, Eric ULg; Mignon, Jacques ULg; Francis, Frédéric ULg

Article for general public (2011)

Bien qu'ils soient consommés partout ailleurs, les insectes provoquent en Occident répulsion et dégoût. Pourtant l'entomophagie n'est pas juste une curiosité. Elle représente un apport protéinique ... [more ▼]

Bien qu'ils soient consommés partout ailleurs, les insectes provoquent en Occident répulsion et dégoût. Pourtant l'entomophagie n'est pas juste une curiosité. Elle représente un apport protéinique extrêmement important et constitue sans doute une précieuse ressource alimentaire pour l'avenir. Chronique d'une future révolution alimentaire en Occident... [less ▲]

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

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

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See detailLe point sur les causes des pertes d'abeilles domestiques en Région Wallonne
Nguyen, Bach Kim ULg; Mignon, Jacques ULg; Widart, Joëlle ULg 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 ULg; Mignon, Jacques ULg; Saegerman, Claude ULg 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 ULg; Mignon, Jacques ULg; Laget, D. et al

Conference (2010)

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

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 ULg; Quievy, Samuel; Mignon, Jacques ULg

Poster (2009, September 16)

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

Poster (2009, September 14)

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

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 detailDoes Imidacloprid Seed-Treated Maize Have an Impact on Honey Bee Mortality?
Nguyen, Bach Kim ULg; Saegerman, Claude ULg; Pirard, Catherine 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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