References of "Mignon, Jacques"
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See detailThe green lacewings in Belgium (Neuroptera : Chrysopidae)
Bozsik, Andras; Mignon, Jacques ULg; Gaspar, Charles

in Acta Zoologica Academiae Scientiarum Hungaricae (2002), 48(Suppl. 2), 53-59

There are merely three published sources of information on the green lacewings in Belgium. The first two were written by a Belgian and a Catalan author at the beginning of the 20th century and the third ... [more ▼]

There are merely three published sources of information on the green lacewings in Belgium. The first two were written by a Belgian and a Catalan author at the beginning of the 20th century and the third was published in 1980. Interestingly, the most recent study reported the fewest species (11), the most previous contained 12 and the second one showed 17 species, This confused situation and the paucity of data initiated the authors to identify the green lacewing collection of the Gembloux University of Agricultural Sciences, where lacewings from different parts of Belgium were preserved, and also to collect chrysopids regularly, Summarising the species reported in the literature and caught during sampling, 18 green lacewing species have been verified in Belgium: Nothochrysa fulviceps, Nothochrysa capitata, Hypochrysa elegans, Nineta flava, Nineta vittata, Nineta pallida, Chrysotropia ciliata, Chrysopa perla, Chrysopa dorsalis, Chrysopa abbreviata, Chrysopa formosa, Chrysopa phlyllochroma, Chrysopa pallens, Dichochrysa flavifrons, Dichochrysa prasina, Dichochrysa ventralis, Chrysoperla carnea, Cunctochrysa albolineata. Considering the known references, one species, Nineta pallida proved to be new for the Belgian fauna. [less ▲]

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See detailContribution à la connaissance des Chrysopidae de Belgique : bilan des captures réalisées à Gembloux.
Mignon, Jacques ULg; Bozsik, Andras; Gaspar, Charles

in Notes Fauniques de Gembloux (2000), 41

Douze espèces de Chrysopidae furent identifiées: H. elegans, N. flava, N. pallida, Ch. ciliata, Ch. perla, Ch. pallens, D. flavifrons, D. prasina, D. ventralis, T. gracilis, Ch. carnea et C. albolineata ... [more ▼]

Douze espèces de Chrysopidae furent identifiées: H. elegans, N. flava, N. pallida, Ch. ciliata, Ch. perla, Ch. pallens, D. flavifrons, D. prasina, D. ventralis, T. gracilis, Ch. carnea et C. albolineata. Une espèce, Tjederina ventralis est nouvelle pour la faune belge. [less ▲]

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See detailFertilization by proxy: Rival sperm removal and translocation in a beetle
Haubruge, Eric ULg; Arnaud, L.; Mignon, Jacques ULg et al

in Proceedings of the Royal Society of London Series B-Biological Sciences (1999), 266(1424), 1183-1187

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See detailEffect of ice-nucleating bacteria (Pseudomonas syringae Van Hall) on insect susceptibility to sub-zero temperatures
Mignon, Jacques ULg; Haubruge, Eric ULg; Gaspar, Charles ULg

in Journal of Stored Products Research (1998), 34(1), 81-86

Many stored product insect pests are termed "freeze-intolerant" because they cannot survive ice formation in their extracellular body fluid. In grain silos, the progressive decrease in temperature permits ... [more ▼]

Many stored product insect pests are termed "freeze-intolerant" because they cannot survive ice formation in their extracellular body fluid. In grain silos, the progressive decrease in temperature permits the acclimation of insects and enhances their cold tolerance. The objective of this study was to examine the influence of the concentration of the ice-nucleating-active bacterium Pseudomonas syringae (10, 100 and 1000 ppm), temperature and duration of sub-zero exposure on the cold tolerance of the granary weevil Sitophilus granarius (L.) and the saw-toothed grain beetle Oryzaephilus surinamensis (L.). After an application of 1000 ppm of powdered P. syringae to grain, the mortality of S. granarius and O. surinamensis was increased after 24-h exposure to -4 degrees C. Higher mortality was observed after exposure to colder temperatures and a dose-response relationship was evident. At near-zero (-4 to 0 degrees C) negative temperatures, no dose response was observed, and the mortality in treated grain was the same as that in untreated grain. (C) 1998 Elsevier Science Ltd. All rights reserved. [less ▲]

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See detailThe impact of sperm precedence in malathion resistance transmission in populations of the red flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)
Haubruge, Eric ULg; Arnaud, Ludovic; Mignon, Jacques ULg

in Journal of Stored Products Research (1997), 33(2), 143-146

Malathion resistance in the red flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) is actually a worldwide problem, and studies on resistance transmission are needed to improve ... [more ▼]

Malathion resistance in the red flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) is actually a worldwide problem, and studies on resistance transmission are needed to improve insecticide resistance management. Females of Tribolium castaneum commonly mate with several males, and the last batch of male sperm preferentially fertilizes subsequent eggs. This phenomenon, a particular form of sexual selection, helps to increase resistance transmission in populations of stored product insects. We confirmed the last male sperm precedence and, in the absence of further matings, examined the evolution of mixed susceptible and malathion-resistant progeny during a 3-month period. The proportion of resistant phenotypes in female progeny was 99.6 and 3%, respectively, after the first mating with a resistant male and the second mating with a susceptible one. When females thus mated twice were isolated from males, the proportion of the resistant phenotype increased to 34.1% after 30 days. From 72 days onwards, this proportion ranged from 14.2 to 29.7%. (C) 1997, Published by Elsevier Science Ltd. [less ▲]

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See detailMortality in Oryzaephilus surinamensis following short-term exposure to conditioned kernels by high-density culture
Mignon, Jacques ULg; Haubruge, Eric ULg; Lienard, Valérie et al

in Entomologia Experimentalis et Applicata (1996), 80(3), 555-557

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See detailA simple technique to relieve Tribolium castaneum (Coleoptera: Tenebrionidae) of Acarophenax tribolii (Acarina: Pyemotidae).
Arnaud, Ludovic; Mignon, Jacques ULg; Gilson, Jean-Claude et al

in Tribolium Information Bulletin (1996), 36

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See detailInfluence of thermal acclimation on the survival of Sitophilus granarius (L) and Oryzaephilus surinamensis (L) at low temperatures
Mignon, Jacques ULg; Haubruge, Eric ULg; Gaspar, Charles ULg

in Netherlands Journal of Zoology (1996), 46(3-4), 317-325

Low temperatures have been used for many years to control populations of stored-product insects. The aim of aeration was primarily to cool down the grain and then to prevent its deterioration by reducing ... [more ▼]

Low temperatures have been used for many years to control populations of stored-product insects. The aim of aeration was primarily to cool down the grain and then to prevent its deterioration by reducing the number of insects. In Belgium, the mild winters enable insects to survive to the next season. In autumn, the progressive lowering of temperature has an acclimation effect on stored-product insects. The present study was undertaken to determine the survival at low temperatures of non cold-acclimated and laboratory- and field-cold-acclimated insects. We have chosen to work with the granary weevil Sitophilus granarius (L.) and the saw-toothed grain beetle Oryzaephilus surinamensis (L.). They are the most frequent stored-grain pests in Belgium. To compare the cold-hardiness of different laboratory cold-acclimated insects, S. granarius and O. surinamensis were placed at nine different cold-acclimation temperature regimes. Insects were kept at 5 degrees C for 2, 4 and 6 weeks or at -5 degrees C for 4, 7 and 14 days. To assess the field-cold-acclimation in autumn and in winter, insects were monthly taken from a bin and transferred to 5 degrees C for 6 weeks. S. granarius adults were more cold-hardy than O. surinamensis, but O. surinamensis adults compensated their cold-sensibility by a great ability to acclimate. S. granarius is able to survive the winter in Belgium because of its cold-hardiness while O. surinamensis survives because of its ability to acclimate to low temperatures. [less ▲]

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See detailInsectes ravageurs: Protection des grains stockés
Mignon, Jacques ULg; Haubruge, Eric ULg; Gaspar, Charles

in Agricontact (1996), 287

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See detailThe use of low temperatures and ice-nucleating bacteria against stored product insects pests
Mignon, Jacques ULg; Haubruge, Eric ULg; Gaspar, Charles ULg

in Mededelingen van de Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen (Rijksuniversiteit te Gent) (1995), 60(3b), 977-984

The present study was undertaken to determine de survival at low temperature of non-cold-acclimated and cold-acclimated insects, and to evaluate the potential of using the ice-nucleating-active bacteria ... [more ▼]

The present study was undertaken to determine de survival at low temperature of non-cold-acclimated and cold-acclimated insects, and to evaluate the potential of using the ice-nucleating-active bacteria Pseudomonas syringae to increase susceptibility of stored-product insects (Sitophilus granarius and Oryzaephilus surinamensis) to cold treatments. [less ▲]

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