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See detailLes insectes, des aliments?
Blecker, Christophe ULg

Conference (2014, May 02)

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See detailLes insectes, des aliments?
Blecker, Christophe ULg

Conference (2013, March 28)

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See detailLes insectes: Jardiniers du diable, templier de Lucifer
Verheggen, François ULg

Conference given outside the academic context (2013)

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See detailInsecticidal activity of Boscia senegalensis (Pers.) Lam ex Poir. on Caryedon serratus (Ol.) pest of stored groundnuts
Gueye, Momar Talla; Seck, Dogo; Ba, Seynabou et al

in African Journal of Agricultural Research (2011), 6(30), 6348-6353

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See detailInsecticidal activity of Lavandula angustifolia Mill. against the pea aphid Acyrtosiphum pisum
Attia, Sabrine; Lognay, Georges ULg; Heuskin, Stéphanie ULg et al

in Journal of Entomology and Zoology Studies (2016), 4(1), 118-122

The essential oil of Lavandula angustifolia was investigated for its biocide activity against Acyrtosiphum pisum by fumigation. The oil was characterised by GC-MS revealing that linalool was the most ... [more ▼]

The essential oil of Lavandula angustifolia was investigated for its biocide activity against Acyrtosiphum pisum by fumigation. The oil was characterised by GC-MS revealing that linalool was the most abundant component (38.57%), followed by linalyl acetate (29.95%), 1,8-cineole (13,66%), camphor (13,13%), -pinene (3,14%) and terpinene-4-ol (1,54%). The Mortality was measured upon treatment with oil concentrations ranging from 5 to 25 µl.l-1 of air. The mortality of aphids increased with oil concentration and LC50 values were determined to be 11.2 µl.l-1 of air. The full mixture was also prepared and toxicity was compared with individual constituents. The results showed that the presence of all constituents were necessary to equal the toxicity of the natural oils L. angustifolia oil can provide valuable pesticide activity with significantly lower LC50 values [less ▲]

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See detailInsecticidal effect of Jatropha curcas L. seed oil on Callosobruchus maculatus Fab and Bruchidius atrolineatus Pic (Coleoptera: Bruchidae) on stored cowpea seeds (Vigna unguiculata L. Walp.) in Niger
Abdoul Habou, Zakari; Haougui, Adamou; Basso, Adamou et al

in African Journal of Agricultural Research (2014), 9(32), 2506-2510

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See detailInsecticidal effect of Jatropha curcas oil on the aphid Aphis fabae (Hemiptera: Aphididae) and on the main insect pests associated with cowpeas (Vigna unguiculata) in Niger
Abdoul Habou, Zakari; Haougui, A.; Mergeai, Guy ULg et al

in Tropicultura (2011), 29(4), 225-229

The insecticidal activity of Jatropha curcas has been evaluated on various crop pests. Oil concentrations of 0.5, 1, 2.5, 5, 10 and 15% were first tested on the black bean aphid (Aphis fabae Scop.) as ... [more ▼]

The insecticidal activity of Jatropha curcas has been evaluated on various crop pests. Oil concentrations of 0.5, 1, 2.5, 5, 10 and 15% were first tested on the black bean aphid (Aphis fabae Scop.) as part of an efficacy test conducted in the laboratory. During a second stage, the insecticidal efficacy of 5 and 7.5% oil concentrations was evaluated on the main pests infesting cowpea crops (Vigna unguiculata L.) as part of a field test conducted at the University of Niamey (Niger). The results obtained in the two tests demonstrate the biocidal effect of the treatments applied, which increases with the concentration. On the black bean aphid, the biocidal effect increases during the hours following the application of oil before reaching a peak after 4 days. On cowpeas, J. curcas oil concentrations of 5% and 7.5% make it possible to reduce the level of attack by aphids (Aphis craccivora) by 10 and 50% respectively compared to the control. A 50% and 75% fall in the number of thrips (Megalurothrips sjöstedti) and bugs (Anoplocnemis curvipes), respectively, can be observed under the same conditions. This treatment made it possible to greatly increase yields compared to the untreated control. [less ▲]

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See detailInsecticide activity of surfactins and iturins from a biopesticide Bacillus subtilis Cohn (S499 strain)
Assié, Lazar; Deleu, Magali ULg; Arnaud, Ludovic et al

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (2002), 67(3), 647-655

Surfactin C14, surfactin C15, and iturin C15 are lipopeptides purified from Bacillus subtilis (S499 strain). They were incorporated into the artificial diet of the fruit fly Drosophila melanogaster to ... [more ▼]

Surfactin C14, surfactin C15, and iturin C15 are lipopeptides purified from Bacillus subtilis (S499 strain). They were incorporated into the artificial diet of the fruit fly Drosophila melanogaster to assess their potential insecticidal activities. Surfactins with long fatty acid chains (C14 and C15) had an insecticidal effect on the fruit fly, D. melanogaster. On the contrary, iturin was not toxic to D. melanogaster. At 100 ppm, surfactin C14 and C15 caused 85.4 and 92.6% adult mortality, respectively, after a one-day exposure. F1 progeny fly emergence inhibition by C14 and C15 were 79.8 and 91.3%, respectively. To check whether the biocide activity of lipopeptides was due to their surface-active properties, detergent Triton X100, SDS, CTAB, and Tween 80 were tested. No adult mortality was recorded with the detergents but Triton X100 and SDS showed F1 progeny emergence inhibition similar to that of surfactins. We showed that there was a dose-response activity with surfactin C15 [less ▲]

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See detailInsecticide resistance enhances male reproductive success in a beetle
Arnaud, Ludovic; Haubruge, Eric ULg

in Evolution (2002), 56(12), 2435-2444

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See detailInsecticide resistance gene transmission by insecticide-susceptible insects
Arnaud, Ludovic; Callaghan, Amanda; Haubruge, Eric ULg

in Functional Ecology (2001)

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See detailInsects Associated With Jatropha curcas Linn. (Euphorbiaceae) in West Niger
Zakari, Abdoul Habou; Toudou, Adam; Haubruge, Eric ULg et al

in Journal of Insect Science [=JIS] (2014)

Jatropha curcas has been introduced into Niger since 2004 by International Crops Research Institute for the Semi-Arid Tropics (ICRISAT). This plant is cultivated for its oil, which can be used as a ... [more ▼]

Jatropha curcas has been introduced into Niger since 2004 by International Crops Research Institute for the Semi-Arid Tropics (ICRISAT). This plant is cultivated for its oil, which can be used as a Biofuel. Through direct and indirect insect collection methods, an inventory of the insect associated with J. curcas has been conducted in Western Niger during two rainy seasons (from June to October) in 2010 and 2011. We have identified insects belonging to the following families: Acrididae (Oedaleus senegalensis Krauss, 15 Oedaleus nigeriensis Uvarov, Heteracris leani Uvarov, Catantops stramineus Walker, Parga cyanoptera Uvarov, and Acanthacris ruficornis citrina Audinet-Serville), Pyrgomorphidae (Poekilocerus bufonius hieroglyphicus Klug), Cetoniidae (Pachnoda interrupta Olivier, Pachnoda marginata aurantia Herbst, Pachnoda sinuata Heinrich and McClain, and Rhabdotis sobrina Gory and Percheron), Meloidae (Decapotoma lunata Pallas), Pentatomidae (Agonoscelis versicoloratus Dallas, Nezara viridula Linn, and Antestia sp. Kirkaldy), Coreidae (Leptoglossus membranaceus Fabricius and Cletus trigonus Thunberg), and Scutelleridae (Calidea panaethiopica Kirkaldy). Origin and 20 potential impact on J. curcas of all these insect species are presented and discussed. The lower insect’s diversity indexes are observed in 2010 and 2011 for Niamey, Saga, and Gaya because of semi-arid character of the Sahelian area. [less ▲]

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See detailInsects complex associated with the tropical basil, Ocimum gratissimum L. (Lamiaceae) in southern Benin.
Yarou, Boni Barthélémy ULg; Bokonon-Ganta, H. Aimé; Assogba Komlan, Françoise et al

Poster (2016, December 16)

Tropical basil is an aromatic leafy vegetable used for its medicinal and therapeutic properties in numerous countries in West Africa (Benin, Nigeria, Togo, etc.). In Benin, it is produced on almost all ... [more ▼]

Tropical basil is an aromatic leafy vegetable used for its medicinal and therapeutic properties in numerous countries in West Africa (Benin, Nigeria, Togo, etc.). In Benin, it is produced on almost all urban and periurban garden throughout the year for fresh market. Until now there are few or nearly no publications about the arthropod community of this specie, even less in the context of Benin. Thus, to assess this community, basil plots were mowed using a sweep net in three localities (Ouidah, Togba and Sèmè) of southern Benin. Preliminary results focus on the different insect families that colonized tropical basil in southern Benin environmental conditions. These include: Aphididae (Homoptera), Cercopidae (Homoptera), Chrysomelidae (Coleoptera), Coccinelledidea (Coleoptera), Meloidae (Coleoptera), Braconidae (Hymenoptera), Ichneumonidae (Hymenoptera), Formicidae (Hymenoptera), Vespidae (Hymenoptera), Apoidae (Hymenoptera), Reduviidae (Heteroptera), Pentatomidae (Heteroptera), Pyrgomorphidae (Orthoptera), Acrididae (Orthoptera), Syrphidae (Diptera), Diopsidae (Diptera). Among these families, there are pests: Aphis gossypii G. (Homoptera: Aphididae), Zonocerus variegatus L. (Orthoptera: Pyrgomorphidae), etc.; predators: Ischiodon aegyptius W. (Diptera: Syrphidae), Cheilomenes spp. (Coleoptera: Coccinelledidea), Rhynocoris spp. (Heteroptera: Reduviidae), etc.; parasitoids and pollinators. From this study, it appeared that there is a large diversity of families and functional groups (pests, predators, parasitoids and pollinators) associated with tropical basil . Moreover, the presence of natural enemies could be an advantage for farmers in intercropping systems. This would help reduce the use of synthetic insecticides. This result, which is a first knowledge of the insect fauna associated with tropical basil under the environmental conditions of Southern Benin, will be supplemented by a spatio temporal study to assess the variability and the dynamics of this insect fauna. [less ▲]

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See detailInsécurité alimentaire et pauvreté des ménages en milieu rural au Niger: cas de la région de Tahoua
Moussa Dit Kalamou, Mahamadou; Yamba, Boubacar; Lebailly, Philippe ULg

in Algerian Journal of Arid Environment (2016), 6(2), 4-15

This study examines the food insecurity situation and household poverty in Tahoua region (Niger). The investigations concerned 420 households distributed in 20 villages according to a reasoned sampling ... [more ▼]

This study examines the food insecurity situation and household poverty in Tahoua region (Niger). The investigations concerned 420 households distributed in 20 villages according to a reasoned sampling proportional to the demographic weight of 8 departments of the region. Household food insecurity results from inadequate cultivable land. Thus, poverty is mostly linked to poor access to basic social services such as education with 29% of school attendees and 53% of illiterates; Health coverage with 53.09% and rudimentary habitats consisting of hutches, straw huts, half or final materials built. Water infrastructure provides 13.5% of households with drinking water. Consequently, the Niger government must respond to reduce the vulnerability of populations to food insecurity and poverty by mobilizing land reserves, supporting pastoralism and nonagricultural activities, and controlling demography. [less ▲]

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See detailL'insécurité dans tous ses états...
Casman, Marie-Thérèse ULg; Hougardy, Lionel ULg; Lemaître, André ULg et al

in Bawin-Legros, Bernadette (Ed.) Familles, modes d'emploi. Etude sociologique des ménages belges (1999)

Detailed reference viewed: 62 (12 ULg)
See detailL’insécurité de l’exclusion sociale : comment sortir de l’impuissance ?
Glowacz, Fabienne ULg

Scientific conference (2015, October 15)

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See detailL'insécurité en question. Définitions, enjeux et perspectives
Wintgens, Sophie ULg; Grandjean, Geoffrey ULg; Vanhaeren, Stéphanie ULg

Book published by Presses Universitaires de Liège (2015)

Ces dernières années, l’analyse et les pratiques de la sécurité et de l’insécurité ont fortement évolué sous l’influence de plusieurs facteurs fortement imbriqués, tels que le déclin de la souveraineté ... [more ▼]

Ces dernières années, l’analyse et les pratiques de la sécurité et de l’insécurité ont fortement évolué sous l’influence de plusieurs facteurs fortement imbriqués, tels que le déclin de la souveraineté nationale, l’accroissement de l’intensité des interactions transnationales ou encore l’éclatement conflictuel sous-tendu par des dynamiques identitaires. Ces constats et les représentations qui leur sont associées ont enjoint un réexamen de la manière dont la sécurité et l’insécurité se pensent et se pratiquent. Inscrit au cœur de ce double questionnement contemporain, cet ouvrage met en question la définition et les enjeux liés aux dynamiques actuelles d’(in)sécurité tout en proposant de nouvelles perspectives. Privilégiant les études empiriques et les approches originales en termes de politique interne et/ou externe, il repose sur trois axes de recherche transversaux : la (re)définition des concepts de sécurité et d’insécurité à l’heure de la globalisation ; les enjeux inhérents aux pratiques (in)sécuritaires et aux sentiments d’(in)sécurité qui les fondent ; les réponses à apporter aux questions de sécurité et d’insécurité. Complémentaire aux analyses disciplinaires classiques de ces objets de recherche en Science politique, cet ouvrage livre un regard neuf sur des thématiques plus que jamais d’actualité. [less ▲]

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See detailInsécurité et exclusion : Deux revers d’une même médaille ?
Born, Michel ULg; Hougardy, Lionel ULg; Lemaître, André ULg

in Bawin-Legros, B.; Stassen, J. (Eds.) L’exclusion et l’insécurité d’existence en milieu urbain (2001)

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See detailInsécurité: Un premier état des savoirs
Franssen, Abraham; Cartuyvels, Yves; Hubert, Hughes-Olivier et al

Report (2003)

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See detailL'insegnamento del diritto romano nel Belgio nel 2010
Gerkens, Jean-François ULg

Conference (2010, November 12)

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See detailThe inseminating bull and plasma pregnancy-associated glycoprotein levels were related to peripheral leukocyte counts during the late pregnancy/early postpartum period in high-producing dairy cows.
Abdelfatah-Hassan, A.; Almeria, S.; Serrano, B. et al

in Theriogenology (2012), 77(7), 1390-1397

The interest in the immunology and endocrinology aspects of the peripartum in dairy cows has been increasing in the last years, since the animal status during the pre- and postpartum period determines the ... [more ▼]

The interest in the immunology and endocrinology aspects of the peripartum in dairy cows has been increasing in the last years, since the animal status during the pre- and postpartum period determines the subsequent productive and reproductive performance of the animal. At parturition, a drop in the immune functions of the peripheral blood polymorph-nuclear cells (PMN) was observed after a peak of Pregnancy-Associated Glycoproteins (PAGs) and recently, the inseminating bull was found to affect the plasma levels of bovine Pregnancy-Associated Glycoproteins (bovine PAGs) in the pregnant Holstein-Friesian dairy cows. The present work was aimed to determine whether changes in leukocyte counts during the peripartum, indicative of the animal immune status, could be related to the inseminating bull and to the levels of plasma pregnancy-associated glycoproteins (PAGs). Ninety six clinically healthy, single pregnant cows were selected in a commercial dairy herd. Six blood samples (four prepartum and two postpartum) were obtained every two weeks, and total and differential blood cell counts were analyzed. Based on procedures of General Linear Model analysis of variance for repeated measures, the inseminating bull affected counts of total leukocytes and lymphocytes (P<0.001; between-subject effects) throughout the peripartum period. In addition, cows with high plasma levels of PAGs (>900 ρg/µL) on Day 262-268 of gestation had higher numbers of total leukocytes and neutrophils throughout the peripartum period (P<0.001; between-subject effects). Young animals (≤ 1 lactation) had higher total leukocyte and lymphocytes counts than older cows (two or more lactations) throughout the study period. These results showed a clear relationship between the inseminating bull and plasma PAG levels and peripheral leukocyte counts during the peripartum period of dairy cows. [less ▲]

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