References of "Haubruge, Eric"
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See detailInsect fatty acids: A comparison of lipids from three Orthopterans and Tenebrio molitor L. larvae
Paul, Aman ULg; Frederich, Michel ULg; Caparros Megido, Rudy ULg et al

in Journal of Asia-Pacific Entomology (2017), 20(2), 337-340

In order to explore some potential insect sources of food lipids, the lipid compositions of three Orthopterans (Acheta domesticus, Conocephalus discolor and Chorthippus parallelus) were analyzed and ... [more ▼]

In order to explore some potential insect sources of food lipids, the lipid compositions of three Orthopterans (Acheta domesticus, Conocephalus discolor and Chorthippus parallelus) were analyzed and compared with those of Tenebrio molitor larvae. A. domesticus, Co. discolor, Ch. parallelus and T. molitor larvae were found to contain approximately 15%, 13%, 10% and 32% lipids on dry weight, respectively. The lipids from three Orthopterans contain much higher amounts of essential fatty acids than those of T. molitor larvae. The two Orthopterans of the suborder Ensifera i.e., A. domesticus and Co. discolor contain linoleic acid in major quantities, while Ch. parallelus of the suborder Caelifera, contain α-linolenic acid in major quantities. The consumption of linoleic and α-linolenic fatty acid is linked with numerous health promoting effects. The factors that contribute to differences in fatty acid profiles of these insects are being discussed. At last the nutritional parameters including polyunsaturated to saturated and omega 6 to omega 3 fatty acid ratios of these insect lipids are also being discussed to understand the potential role of these lipids in human nutrition. [less ▲]

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See detailMicrobiological load of edible insects found in Belgium
Caparros Megido, Rudy ULg; Desmedt, Sandrine; Blecker, Christophe ULg et al

in Insects (2017)

Edible insects are gaining more and more attention as a sustainable source of animal protein for food and feed in the future. In Belgium, some insect products can be found on the market, and consumers are ... [more ▼]

Edible insects are gaining more and more attention as a sustainable source of animal protein for food and feed in the future. In Belgium, some insect products can be found on the market, and consumers are sourcing fresh insects from fishing stores or towards traditional markets to find exotic insects that are illegal and not sanitarily controlled. From this perspective, this study aims to characterize the microbial load of edible insects found in Belgium (i.e., fresh mealworms and house crickets from European farms and smoked termites and caterpillars from a traditional Congolese market) and to evaluate the efficiency of different processing methods (blanching for all species and freeze-drying and sterilization for European species) in reducing microorganism counts. All untreated insect samples had a total aerobic count higher than the limit for fresh minced meat (6.7 log cfu/g). Nevertheless, a species-dependent blanching step has led to a reduction of the total aerobic count under this limit, except for one caterpillar species. Freeze-drying and sterilization treatments on European species were also effective in reducing the total aerobic count. Yeast and mold counts for untreated insects were above the Good Manufacturing Practice limits for raw meat, but all treatments attained a reduction of these microorganisms under this limit. These results confirmed that fresh insects, but also smoked insects from non-European trades, need a cooking step (at least composed of a first blanching step) before consumption. Therefore, blanching timing for each studied insect species is proposed and discussed. [less ▲]

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See detailElevated carbon dioxide concentration reduces alarm signaling in aphids
Boullis, Antoine ULg; Fassotte, Bérénice ULg; Sarles, Landry ULg et al

in Journal of Chemical Ecology (2017), 43

Insects often rely on olfaction to communicate with surrounding conspecifics. While the chemical language of insects has been deciphered in recent decades, few studies have assessed how changes in ... [more ▼]

Insects often rely on olfaction to communicate with surrounding conspecifics. While the chemical language of insects has been deciphered in recent decades, few studies have assessed how changes in atmospheric greenhouse gas concentrations will impact pheromonal communication by insects. Here, we hypothesize that changes in the concentration of atmospheric carbon dioxide (CO2) affect the whole dynamics of alarm signaling in aphids, including: (1) the production of the active compound (E)-β-farnesene (Eβf), (2) emission behavior when under attack, (3) perception by the olfactory apparatus, and (4) the escape response. We reared two strains of the pea aphid Acyrthosiphon pisum under ambient and elevated CO2 concentrations for several generations. We found that an increase in CO2 concentration reduced the production (i.e., individual content) and emission of Eβf (released under predation events). While no difference in Eβf neuronal perception was observed, we found that an increase in CO2 strongly reduces the escape behavior expressed by an aphid colony following exposure to natural doses of the alarm pheromone. In conclusion, our results confirm that changes to greenhouse gases do impact chemical communication in insects, and could potentially have a cascade effect on interactions with higher trophic levels. [less ▲]

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See detailNutritional Composition and Rearing Potential of the Meadow Grasshopper (Chorthippus parallelus Zetterstedt)
Paul, Aman ULg; Frederich, Michel ULg; Uyttenbroeck, Roel ULg et al

in Journal of Asia-Pacific Entomology (2016), 19(4), 1111-1116

Insects, particularly those belonging to the family Acrididae (grasshoppers), are commonly consumed as human food in many parts of the world. Grasshoppers of the species Chorthippus parallelus are ... [more ▼]

Insects, particularly those belonging to the family Acrididae (grasshoppers), are commonly consumed as human food in many parts of the world. Grasshoppers of the species Chorthippus parallelus are abundantly found throughout Europe. However, these insects were not consumed by Europeans till now, but could possibly be used as human food, which is why we investigated their chemical composition. We found that they contain high level of proteins (69%), with an excellent amino acid profile and protein digestibility (97%). Furthermore, specimens of C. parallelus have an interesting fatty acids profile and minerals composition. Preliminary toxicity assessment indicates that these insects do not exhibit toxicity towards neutrophil cells (white blood cells). These data suggest that C. parallelus could be considered for human consumption. Rearing trials done during the study show that commercial rearing could be developed to produce sufficient biomass for sustaining human consumption. [less ▲]

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See detailExtraction of honey polyphenols: Method development and evidence of cis isomerization
Istasse, Thibaut ULg; Jacquet, Nicolas ULg; Berchem, Thomas ULg et al

in Analytical Chemistry Insights (2016), 11

Honey polyphenols have been studied with the objective of relating honeys to their floral sources. Initially synthesized by plant, these polyphenols can be found in the plant’s nectar, where they are ... [more ▼]

Honey polyphenols have been studied with the objective of relating honeys to their floral sources. Initially synthesized by plant, these polyphenols can be found in the plant’s nectar, where they are collected by bees which convert the nectar into honey. Consequently, polyphenols constitute minor honey components. The development of a solid phase extraction method for honey polyphenols is presented herein. The technique employs Amberlite XAD-2 adsorbent and was tested on monofloral honeys from six different plants: acacia, chestnut, eucalyptus, thyme, sunflower and wild carrot. Analyses were performed using high performance liquid chromatography coupled with UV detection and mass spectrometry. Several phenolic acids and flavonoids were identified: caffeic and p-coumaric acids, quercetin, kaempferol, naringenin, chrysin and pinocembrin. Generally, the quantity of a given polyphenol in the honey was around 0.2 mg/100g of honey, except for chestnut honey which contained around 3.0 mg of p-coumaric acid/100g of honey. Analyses highlighted significant formation of cis isomers for phenolic acids during the extraction despite protection from light. [less ▲]

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See detailLa biodiversité entomologique comme source d’aliments à Kinshasa (République démocratique du Congo)
Nsevolo, Papy; Alabi, Taofic ULg; Caparros Megido, Rudy ULg et al

in Annales de la Société Entomologique de France (2016)

L’exploitation des produits forestiers non ligneux dont notamment les insectes comestibles jouent un rôle important dans les habitudes alimentaires et économies locales des populations autochtones du ... [more ▼]

L’exploitation des produits forestiers non ligneux dont notamment les insectes comestibles jouent un rôle important dans les habitudes alimentaires et économies locales des populations autochtones du bassin du Congo. Bien que la consommation d’insectes en République Démocratique du Congo soit une pratique ancienne, l’inventaire et l’identification taxonomique des espèces consommées ainsi que la caractérisation de la filière « entomophagie » sont encore mal maitrisés. Toutefois, nos études axées sur la ville de Kinshasa ont permis d’inventorier 14 espèces comestibles régulièrement consommées. Elles appartiennent à l’ordre des Lépidoptères (46,7%), des Isoptères (18,6%), des Orthoptères (17,6%), des Coléoptères (9,7%) et des Hyménoptères (3,7%). De façon générale, 80% de la population de Kinshasa consomment au minimum une espèce d’insecte 5 jours par mois avec des quantités variant de 66,4 à 154 g d’insectes par personne par jour en fonction des différents ordres. Les acteurs de la filière sont majoritairement des femmes. Les revenus générés par l’activité concourent au bien-être des ménages, à la réduction de la pauvreté et de l’insécurité alimentaire dans de la capitale Kinshasa. [less ▲]

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See detailPRODUCTION OF BIOFUELS AND BIOBASED COMPOUNDS IN URBAN BIOREFINERIES: A STRATEGY TO MANAGE WASTE IN WALLONIA?
Richel, Aurore ULg; Haubruge, Eric ULg; Jacquet, Nicolas ULg

Conference (2016, May)

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for ... [more ▼]

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for the production of an array of biofuels and bioproducts. This “urban biorefining” concept fits particularly with the economic, geographic and politic contexts and constraints of the Walloon Region (south part of Belgium). Indeed, Walloon Region is a very small territory (area of about 6,504 sq mi) with a temperate climate. Supply feedstock, mainly arising form forestry and agriculture, are thus rather restricted, submitted to importation, and subjected to non-standardized quality. Several examples of our regional strategy, still available on an industrial scale, are herein proposed and detailed. [less ▲]

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See detailForaging wireworms are attracted to root-produced volatile aldehydes
Barsics, Fanny ULg; Delory, Benjamin M.; Delaplace, Pierre ULg et al

in Journal of Pest Science (2016)

Soil-dwelling insects are known to react to chemical cues they encounter in the rhizosphere. Whether wireworms (Coleoptera, Elateridae) use root-emitted volatile organic chemicals to localize their host ... [more ▼]

Soil-dwelling insects are known to react to chemical cues they encounter in the rhizosphere. Whether wireworms (Coleoptera, Elateridae) use root-emitted volatile organic chemicals to localize their host plant remains, however, poorly understood. Here, we aimed at identifying chemical cues released by barley roots that attract Agriotes sordidus. In a first behavioral experiment, we assessed the ability of wireworms to orient towards live barley roots, using dual-choice olfactometers suitable for belowground insects. Then, we collected the volatile organic compounds (VOC) produced by barley roots using a dynamic head-space sampling approach. VOC were quantified and identified using gas chromatography—mass spectrometry (GC–MS). The odorant blend is composed of four aldehydes, namely hexanal, (E)-hex-2-enal, (E)-non-2-enal, and (E,Z)-nona-2,6-dienal. In a second set of dual-choice bioassays, wireworms were attracted towards a synthetic blend of these four major compounds. However, the synthetic blend was not as attractive as live roots, which is partially explained by the absence of CO2, commonly known as a strong attractant for soil-dwelling insects. While CO2 indicates the presence of living material in the vicinity, we hypothesize that additional VOC inform about the plant suitability. A better understanding of these belowground signals would contribute to the development of new integrated control strategies against wireworms. [less ▲]

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See detailDiversity and ecology survey of mosquitoes potential vectors in Belgian equestrian farms: A threat prevention of mosquito-borne equine arboviruses
Boukraa, Slimane ULg; de la Grandière, Maria Ana ULg; Bawin, Thomas ULg et al

in Preventive Veterinary Medicine (2016), 124

Emergence of West Nile Virus was recently recorded in several European countries, which can lead to severe health problems in horse populations. Europe is also at risk of introduction of mosquito-borne ... [more ▼]

Emergence of West Nile Virus was recently recorded in several European countries, which can lead to severe health problems in horse populations. Europe is also at risk of introduction of mosquito-borne equine alphavirus from Americas. Prevention of these arboviruses requires a clear understanding of transmission cycles, especially their vectors. To characterize mosquito fauna, their ecology and identify potential vectors of equine arboviruses in Belgium, entomological surveys of six equestrian farms located in the Wolloon Region were conducted during 2011–2012. The harvest of mosquitoes was based on larval sampling (272 samples from 111 breeding sites) and monthly adults trapping (CO2-baited traps, Mosquito Magnet Liberty Plus). Among 51,493 larvae and 319 adult mosquitoes collected, morphological identification showed the presence of 11 species: Anopheles claviger (Meigen), An. maculipennis s.l. (Meigen), An. plumbeus (Stephens), Culex hortensis (Ficalbi), Cx. territans (Walker), Cx. pipiens s.l. L., Cx. torrentium (Martini), Coquillettidia richiardii (Ficalbi), Culiseta annulata (Schrank), Aedes cantans (Meigen), Ae. geniculatus (Olivier). Molecular identification of Cx. pipiens species complex allowed the detection of three molecular forms, Pipiens (92.3%), Molestus (4.6%) and Hybrid (3.1%). Larvae of Cx. pipiens sl and Cx. torrentium were omnipresent and the most abundant species. Water troughs, ponds and slurry (liquid manure) were the most favorable breeding sites of mosquito larvae. Based upon behavior and ecology of the identified mosquito species, Studied Belgian equestrian farms seem to provide a suitable environment and breeding sites for the proliferation of potential vectors of arboviruses and those being a real nuisance problem for horses and neighboring inhabitants. [less ▲]

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See detailLa législation REACH: une opportunité d’innovation pour l’économie biobasée
Schmetz, Quentin ULg; Richel, Aurore ULg; Jacquet, Nicolas ULg et al

Conference (2016, January 20)

REACH is the acronym given to the integrated legislative system for the recording, evaluation, authorization and restriction of chemicals introduced by the European Union. The aim of REACH is to improve ... [more ▼]

REACH is the acronym given to the integrated legislative system for the recording, evaluation, authorization and restriction of chemicals introduced by the European Union. The aim of REACH is to improve and ensure health and environmental protection while boosting competitiveness and innovation in the European chemicals industry. This system thus strongly encourages the transition to a biobased economy by encouraging the development and the operation of production patterns and new substitutes greener for the environment and health. Biotechnological production pathways, including the use of renewable raw materials have thus been developed over the past decade in the industry, and this trend is confirmed for the coming years. This presentation provides an update on current trends in this sector through various concrete cases such as flame retardant, plasticizer and surfactant substituted by alternatives from the vegetal. It also discusses the various research programs carried out in the Laboratory of Biological and Industrial Chemistry of Gembloux Agro-Bio Tech that allowed the development of new biobased substances consistent with a more sustainable chemistry and meeting REACH requirements. [less ▲]

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See detailFirst survey on prevalence and infestation rates of Varrroa mite in Gabon
Fabre Anguilet, Edgard ULg; Alabi, Taofic ULg; Bengone Ndong, Toussaint et al

in Communications in Agricultural and Applied Biological Sciences (2016), 81(3), 299-305

Varroa mites cause considerable damage to Apis mellifera Linnaeus colonies in North America, Europe and Asia. To control this parasite, beekeepers in these parts of world have to use chemical acaricides ... [more ▼]

Varroa mites cause considerable damage to Apis mellifera Linnaeus colonies in North America, Europe and Asia. To control this parasite, beekeepers in these parts of world have to use chemical acaricides. In Africa, this pest has been identified, and survey of Varroa infestation rates showed a lot of variation across honey bee sub-species. Generally, African colonies seemed to be resistant or tolerant to the presence of Varroa mite. The objective of our study is to explore the presence, prevalence and infestation rates of Varroa mite in Gabon. The presence and quantitative assessment of Varroa mites were performed in 55 wild colonies of Apis mellifera adansonii Latreille in two locations. Our results showed that: (1) 70% and 48% of the wild colonies studied were infested with Varroa destructor according to locations, (2) Varroa infestation rate was lower than 0.5 mite per 100 bees regardless location. The infestation rates obtained were still very low compared to those observed in various other regions in Africa. In perspective, it would be interesting to explore the reasons that could explain the low infestation rates which were observed. [less ▲]

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See detailGrasshoppers as a food source? A review
Paul, Aman ULg; Frederich, Michel ULg; Uyttenbroeck, Roel ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016), 20(AgricultureIsLife), 337-352

Description of the subject. Current trends suggest an increasing future demand for conventional meats, which indicates a strong need to shift this dependency to other alternative protein sources such as ... [more ▼]

Description of the subject. Current trends suggest an increasing future demand for conventional meats, which indicates a strong need to shift this dependency to other alternative protein sources such as insects. Literature. From a nutritional point of view, of all the insects consumed globally, grasshoppers are particularly important as a human food. Data from the literature regarding the nutrient composition, amino acid profile, fatty acid profile, mineral composition and vitamin content of grasshoppers as reviewed in this paper, suggest that a number of grasshopper species are a good source of nutrients. It also highlights some of the health related aspects that might arise from the consumption of grasshoppers, mostly linked to agricultural practices and the allergic response of sensitive individuals. The paper also summarizes some religious, social and economic factors that are associated with grasshopper consumption. Conclusions. The success of introducing grasshoppers as a novel food in western countries depends on changes in consumer attitudes. It would be interesting to develop food products derived from grasshoppers in a form acceptable to consumers. Furthermore, it is important to explore the food potential of some grasshopper species native to western countries and to develop their rearing methodologies to enhance availability. [less ▲]

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See detailTowards sustainable food systems: the concept of agroecology and how it questions current research practices. A review
Hatt, Séverin ULg; Artru, Sidonie ULg; Brédart, David ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016), 20(Special issue 1), 215-224

Introduction. Multiple environmental and socio-economic indicators show that our current agriculture and the organization of the food system need to be revised. Agroecology has been proposed as a ... [more ▼]

Introduction. Multiple environmental and socio-economic indicators show that our current agriculture and the organization of the food system need to be revised. Agroecology has been proposed as a promising concept for achieving greater sustainability. This paper offers an overview and discussion of the concept based on existing literature and case studies, and explores the way it questions our current research approaches and education paradigms. Literature. In order to improve the sustainability of agriculture, the use of external and chemical inputs needs to be minimized. Agroecological farming practices seek to optimize ecological processes, thus minimizing the need for external inputs by providing an array of ecosystem services. Implementing such practices challenges the current structure of the food system, which has been criticized for its lack of social relevance and economic viability. An agroecological approach includes all stakeholders, from field to fork, in the discussion, design and development of future food systems. This inclusion of various disciplines and stakeholders raises issues about scientists and their research practices, as well as about the education of the next generation of scientists. Conclusions. Agroecology is based on the concept that agricultural practices and food systems cannot be dissociated because they belong to the same natural and socio-economic context. Clearly, agroecology is not a silver-bullet, but its principles can serve as avenues for rethinking the current approaches towards achieving greater sustainability. Adapting research approaches in line with indicators that promote inter- and transdisciplinary research is essential if progress is to be made. [less ▲]

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See detailAgricultureIsLife or how to facilitate innovation in agriculture through multi-disciplinary research
Monty, Arnaud ULg; Garré, Sarah ULg; Bindelle, Jérôme ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016)

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See detailBacteria may contribute to distant species recognition in ant–aphid mutualistic relationships
Fischer, Christophe ULg; Detrain, Claire; Thonart, Philippe ULg et al

in Insect Science (2016)

Mutualistic interactions between ant and aphid species have been the subject of considerable historical and contemporary investigations, the primary benefits being cleaning and protection for the aphids ... [more ▼]

Mutualistic interactions between ant and aphid species have been the subject of considerable historical and contemporary investigations, the primary benefits being cleaning and protection for the aphids and carbohydrate-rich honeydew for the ants. Questions remained, however, as to the volatile semiochemical factor influencing this relationship. A recent study highlighted the role of bacterial honeydew volatile compounds in ant attraction. Here, ant’s ability to distantly discriminate two aphid species was investigated based on bacterial honeydew semiochemicals emissions using a two-way olfactometer. Both the mutualistic black bean aphid (Aphis fabae L.) and the non-myrmecophilous pea aphid (Acyrthosiphon pisum Harris) were found to be attractive for the black garden ant (Lasius niger L.). The level of attraction was similar in both assays (control versus one of the aphid species). However, when given a choice between these two aphid species, ants showed a significant preference for Aphis fabae. Honeydew volatiles, mostly from bacterial origins, are known to be a key element in ant attraction. Using the same olfactometry protocol, the relative attractiveness of volatiles emitted by honeydews collected from each aphid species and by bacteria isolated from each honeydew was in investigated. Again, ants significantly preferred volatiles released by Aphis fabae honeydew and bacteria. This information suggests that microbial honeydew volatiles enable ants to distantly discriminate aphid species. These results emphasize the importance of investigating the presence and potential effects of microbes in insect symbioses. [less ▲]

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See detailConsommation d’insectes : des arguments santé à l’acceptation et au changement de comportement alimentaire
Caparros Megido, Rudy ULg; Alabi, Taofic ULg; Haubruge, Eric ULg et al

in Le Gall, Philippe; Motte-Florac, Elisabeth (Eds.) Savoureux insectes De l’aliment traditionnel à l’innovation gastronomique (2016)

Encore un petit Choco-croque de grillons ou un Crumble aux vers de farine ? Délicieuses gourmandises ! Comment ne pas se lancer dans cette découverte gastronomique quand les insectes sont envisagés comme ... [more ▼]

Encore un petit Choco-croque de grillons ou un Crumble aux vers de farine ? Délicieuses gourmandises ! Comment ne pas se lancer dans cette découverte gastronomique quand les insectes sont envisagés comme source majeure de protéines animales pour les décennies à venir ? Le sujet est à la mode mais exige d’être abordé sans tomber dans la raillerie, le sensationnalisme ou les raccourcis approximatifs et discutables. C’est pourquoi ce livre dresse une large fresque de la façon dont des insectes ont été consommés par l’homme, depuis nos plus lointains ancêtres jusqu’à l’époque contemporaine, et envisage leur contribution à la sécurité alimentaire de la population mondiale pour le XXIe siècle. De nombreux spécialistes apportent, à travers des exemples pris sur tous les continents, des réponses simples et claires mais aussi précises et rigoureuses aux interrogations que soulève la consommation d’insectes. Tous les insectes peuvent-ils être consommés ? Qui en mange d ans le monde ? Quel goût ont-ils ? Lesquels sont comestibles ? Comment faut-il les préparer, les conserver, les accommoder ? Faut-il les manger tout entiers ? Existe-t-il des produits alimentaires industriels qui en contiennent ? En manger n’est-il pas dangereux pour la santé ? Leur récolte ne met-elle pas en péril l’équilibre des écosystèmes ? Que penser de leur élevage ? [less ▲]

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See detailCurrent status of edible insect industry and research in Europe with a particular focus on the Belgian case
Caparros Megido, Rudy ULg; Alabi, Taofic ULg; Haubruge, Eric ULg et al

Conference (2016)

Since the FAO (Food and Agriculture Organization of the United Nations) announcement, in 2013, of an edible insect program, entomophagy (i.e. the consumption of edible insects) is actually considered as a ... [more ▼]

Since the FAO (Food and Agriculture Organization of the United Nations) announcement, in 2013, of an edible insect program, entomophagy (i.e. the consumption of edible insects) is actually considered as a future ecological alternative to protein supply in Europe. However, success in introducing entomophagy in Western societies depends on factors governing current legislation adaptation and consumers’ attitudes towards insect-based products. Firstly, current legislative brake for the development of insect industry and future adaptation of this legislation will be explained and discussed. As an example, few edible insect species are allowed in Europe (at least 10 species and only in Belgium) and among them, some insects are rather intended for human consumption, as Acheta domestica (L. 1758), while others are more targeted for feed since they are reared on decaying organic matter, such as Hermetia illucens (L. 1758) but are still not allowed. Secondly, a quick presentation of the actual European research projects on edible insects will be presented to show the real interest for this new protein source in Europe. Thirdly, the actual growing business of edible insect will be presented as despite the lack of clear legislative frameworks before 2017, insect breading and insect processing companies are created every month and try to ride the wave of edible insects. Finally, a new consumer acceptance study from our laboratory will be presented, as highlighted before, consumer acceptance is big concern for edible insect business in Europe. Effectively, edible insect is very unconventional in Europe and new insect-based products must be deeply studied before any relying on the market. [less ▲]

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See detailHow to convince Westerners to eat insects?
Caparros Megido, Rudy ULg; Alabi, Taofic ULg; Haubruge, Eric ULg et al

Conference (2016)

Edible insects are actually fashionable in Westerners aperitif. This marketing strategy allows producers to sell dried insects at high prices but without a sustainable establishment on the market. For a ... [more ▼]

Edible insects are actually fashionable in Westerners aperitif. This marketing strategy allows producers to sell dried insects at high prices but without a sustainable establishment on the market. For a better position on the marketplace, several studies suggest integrating insects in an invisible way in ready-to-eat preparations. This talk present our past studies on the subject and a new one, using entomophagy perception questionnaires and hedonic scales, that compared the sensory-liking of dried mealworms and homemade pasta enriched with 10% of mealworms. Unsurprisingly, 90% of the participants preferred mealworms pasta. Nevertheless, it has been shown that women who have already eaten insects gave higher ratings to the two preparations’ taste while men responded similarly regardless their previous experience. It was also found a correlation between the overall liking evaluation, closely related to the odor evaluation, and the respondents’ personality. Effectively, people whom self-characterized them as suspicious gave low ratings to the two preparations; curious, adventurous and down-to-earth people intermediately rated preparations while ambitious people highly rated them. This study confirms the possible insect integration by proposing powdered insects in ready-to-eat preparations. A particular attention to products’ odor must be done, as suspicious people seem to rely on this organoleptic property to assess their global evaluation of insects’ products. Finally, women taste evaluation strengthened the idea that women are more neophobic than men as only women with previous experiences with insects gave high ratings to the preparations. As key contributors in food shopping decisions, women could be targeted by specific insect tasting sessions correlated with healthy or sustainable arguments to support entomophagy. [less ▲]

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See detailSynthèse bibliographique sur le comportement de recherche de l’hôte chez la punaise de lit (Cimex lectularius) et applications dans le cadre de la lutte intégrée
Legrand, Pauline ULg; Verheggen, François ULg; Haubruge, Eric ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016), 20(2),

This study analyzes host-seeking behavior in the common bed bug, Cimex lectularius, paying particular attention to human stimuli involved in this orientation process. The potential applications in ... [more ▼]

This study analyzes host-seeking behavior in the common bed bug, Cimex lectularius, paying particular attention to human stimuli involved in this orientation process. The potential applications in integrated pest management are discussed. The common bed bug is an obligate hematophagous that has been associated with humans for millennia. When searching for food, this insect relies for orientation on signals produced by its hosts. Carbon dioxide emitted by human respiration is more attractive to bugs than body heat. The response of bed bugs to other volatile organic compounds released by the human body has been tested, but their perception and behavioral impact are not always studied together, and some discrepancies occasionally appear. Currently, carbon dioxide is the most efficient lure for bed bugs, although real human bait is more attractive. Some home-made traps baited with dry ice are more efficient than other traps using complicated chemical blends. Dry ice seems to be more efficient as a lure than complex chemical blends, and it can be used in simple traps. Our knowledge of host-seeking behavior in bed bugs is still partial and new questions are constantly arising. Further efforts in the study of the chemical ecology of this process are needed in order to improve the management of this pest. The control of bed bugs in European countries appears to be a major challenge for the years to come. [less ▲]

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