Georges Lognay

ORCID: 0000-0002-9103-2846
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About
Contact & Profiles
Research Areas
  • Insect Pest Control Strategies
  • Insect and Pesticide Research
  • Insect-Plant Interactions and Control
  • Essential Oils and Antimicrobial Activity
  • Plant and animal studies
  • Insect and Arachnid Ecology and Behavior
  • Agricultural pest management studies
  • Plant Parasitism and Resistance
  • Agriculture and Rural Development Research
  • Food Chemistry and Fat Analysis
  • Analytical Chemistry and Chromatography
  • African Botany and Ecology Studies
  • Phytochemistry and Biological Activities
  • Horticultural and Viticultural Research
  • Banana Cultivation and Research
  • Enzyme Catalysis and Immobilization
  • Nematode management and characterization studies
  • Plant biochemistry and biosynthesis
  • Edible Oils Quality and Analysis
  • Proteins in Food Systems
  • Phytochemicals and Antioxidant Activities
  • Insect Resistance and Genetics
  • Genomics, phytochemicals, and oxidative stress
  • Fatty Acid Research and Health
  • Meat and Animal Product Quality

Gembloux Agro-Bio Tech
2013-2024

University of Liège
2013-2024

University of Carthage
2022

UCLouvain
2022

Unité Évolution, Écologie et Paléontologie
2019

Université de Lille
2019

Centre National de la Recherche Scientifique
2019

AgroBio
2017-2018

Institut de Technologie Alimentaire
2013

Laboratoire de Chimie Organique
1995

Larvae and imagos of bees rely exclusively on floral rewards as a food source but host-plant range can vary greatly among bee species. While oligolectic species forage pollen from single family host plants, polylectic bees, such bumblebees, collect many families plants. These contend with interspecific variability in essential nutrients their host-plants we have only limited understanding the way which chemicals chemical combinations influence development feeding behaviour. In this paper,...

10.1371/journal.pone.0086209 article EN cc-by PLoS ONE 2014-01-21

Aphids are one of the most serious pests crops worldwide, causing major yield and economic losses. To control aphids, natural enemies could be an option but their efficacy is sometimes limited by dispersal in environment. Here we report first isolation a bacterium from pea aphid Acyrthosiphon pisum honeydew, Staphylococcus sciuri, which acts as kairomone enhancing efficiency enemies. Our findings represent case host-associated driving prey location ovipositional preference for enemy. We show...

10.1038/ncomms1347 article EN cc-by-nc-nd Nature Communications 2011-06-14

Abstract BACKGROUND: The vitamin C and polyphenol content of apples constitute quality nutritional parameters great interest for consumers, especially in terms health. They are commonly measured using laborious reference methods. purpose this study was to evaluate the potential near‐infrared (NIR) spectroscopy as a rapid non‐destructive method determine sugar, total apples. RESULTS: more than 150 apple genotypes were analyzed NIR results obtained least squares support vector machine...

10.1002/jsfa.5779 article EN Journal of the Science of Food and Agriculture 2012-07-02

Abstract: Herbivore insects use a broad range of chemical cues to locate their host feed or oviposit. Whether several plant volatiles are effective allelochemicals for insects, the latter also emit molecules which have infochemical role. The (E)‐ β ‐farnesene (EBF) is well‐known aphid alarm pheromone commonly found in all previously tested species. Analysis released from 23 species, mainly collected on natural May July, was performed by gas chromatography–mass spectrometry. While EBF...

10.1111/j.1439-0418.2005.00925.x article EN Journal of Applied Entomology 2005-01-13

Studies were conducted on some quality characteristics of date seed oil from two palm cultivars ( Phoenix dactylifera L.): Deglet Nour and Allig. The following values obtained for Allig respectively: unsaponifiable matter 8.92-7.76%, iodine value 45.49-44.08, total phenols 520.81-220.32µg/g oil, chlorophylls 0.86-0.58µg/g viscosity 18.50-20.50mPa.s, refractive index 1.457-1.462, acidity 1.06-2.10mg KOH/g peroxide 16.00-25.00meq O 2 /100g oil. Lipid fractionation yielded 98.30-97.30% neutral...

10.1177/1082013204047777 article EN Food Science and Technology International 2004-10-01

ABSTRACT Oils extracted from the seeds of two date palm ( Phoenix dactylifera L.) cultivars, Deglet Nour and Allig, collected Tunisia, were compared in terms phenolic, tocopherol sterol profiles. These minor components are not only very important for functional properties oils (oxidation resistance, taste, aroma color), but could also have many health benefits. Total phenols, considered as principal source oil oxidation ranged 520.81 to 220.32 mg/kg Allig. High performance liquid...

10.1111/j.1745-4522.2004.01141.x article EN Journal of Food Lipids 2004-12-01

Resistance in banana roots against the burrowing nematode Radopholus similis has been correlated past with phenylpropanoid pathway of secondary metabolism, but quantitative chemical analyses to support histological data are lacking. Therefore, healthy and infected two susceptible (Grande naine Obino l’ewai) three resistant cultivars (Yangambi km5, Pisang jari buaya Calcutta 4) were extracted chemically analysed for their lignin content profile using a assay, high performance liquid...

10.1111/j.1365-3059.2007.01607.x article EN Plant Pathology 2007-03-29

Plants are able to interact with their environment by emitting volatile organic compounds. We investigated the interactions that take place below ground between barley roots and two pathogenic fungi, Cochliobolus sativus Fusarium culmorum. The molecules emitted each fungus, non-infected infected one of fungi or them were extracted head-space solid phase micro extraction analyzed gas chromatography mass spectrometry. effect fungal volatiles on growth root assessed cultivating both organisms...

10.1371/journal.pone.0066805 article EN cc-by PLoS ONE 2013-06-20

The two-spotted spider mite Tetranychus urticae Koch is a worldwide pest, feeding on large variety of plant families. As its resistance to acaricides spreads rapidly, it crucial develop new biological control tactics manage populations. In this respect, essential oils may be good alternative, as they are currently considered minimum-risk pesticides. paper, we conducted series laboratory experiments determine the susceptibility adult females 31 extracted from plants collected Tunisia and...

10.1080/10412905.2012.676777 article EN Journal of Essential Oil Research 2012-05-11

Abstract Current evidence suggests that pollen is both chemically and structurally protected. Despite increasing interest in studying bee–flower networks, the constraints for bee development related to nutritional content, toxicity digestibility as well their role shaping of interactions have been poorly studied. In this study we combined bioassays generalist Bombus terrestris on Cirsium , Trifolium Salix Cistus genera with an assessment toxicity, pollen. Microcolonies showed significant...

10.1111/1744-7917.12410 article EN Insect Science 2016-10-13
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