References of "Haubruge, Eric"
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See detailHow does the age of hoverfly females affect their reproduction?
Almohamad, Raki; Verheggen, François ULg; Francis, Frédéric ULg et al

Conference (2007)

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See detailVirale bijenziekten
Nguyen, Bach Kim ULg; Haubruge, Eric ULg

Conference given outside the academic context (2007)

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See detailLa varroase et les maladies liées au rucher
Nguyen, Bach Kim ULg; Haubruge, Eric ULg

Conference given outside the academic context (2007)

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See detailIntraguild interactions of aphidophagous predators in fields: effect of Coccinella septempunctata and Episyrphus balteatus occurrence on aphid infested plants.
Alhmedi, Ammar; Francis, Frédéric ULg; Bodson, Bernard ULg et al

in Communications in Agricultural and Applied Biological Sciences (2007), 72(3), 381-90

Intraguild relations between beneficial insects have become a major research topic in biological pest control. In order to understand the intraguild competitions between aphidophagous populations in ... [more ▼]

Intraguild relations between beneficial insects have become a major research topic in biological pest control. In order to understand the intraguild competitions between aphidophagous populations in natural conditions, a field experiment was carried out in the experimental farm of the Gembloux Agricultural University. As biological control of pests involve a community of diverse natural enemies, this experiment firstly aimed to assess the aphidophagous predator diversity and abundance in green pea (Pisum sativum) field and secondly to investigate the impact of the large natural occurrence of C. septempunctata on the aphidophagous beneficial dispersion and efficiency as aphid biological control agents in pea field. Visual observations were weekly performed throughout the 2006 growing season. The pea aphids were attacked by several predatory groups, mainly ladybird beetles and hoverflies. Higher densities of ladybirds and hoverflies were recorded in the beginning of July, associated with an aphid occurrence peak. Using net cage system in the field, the particular intraguild relations between added C. septempunctata or E. balteatus and the natural beneficial arrivals and dispersion were observed. The E. batteatus (eggs and larvae) presence inhibited other aphidophagous predators presence on the aphid infested plants. Lower abundance of E. balteatus was observed on aphid infested plants already colonised by C. septempunctata. To explore more accurately the oviposition and predation behaviours of ladybirds and hoverflies and to determine the chemical factors that could influence these behaviours, current researches are performed in laboratory and will be discussed to promote efficient biological control of aphids by natural enemies. [less ▲]

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See detailEffect of a fungal lectin from Xerocomus chrysenteron (XCL) on the biological parameters of aphids.
Jaber, Karimi; Francis, Frédéric ULg; Paquereau, Laurent et al

in Communications in Agricultural and Applied Biological Sciences (2007), 72(3), 629-38

Aphids are important pests of crop plants in Europe. Increasing resistance of aphids to insecticides and their side effects on the environment and non target organism's including human's stimulated ... [more ▼]

Aphids are important pests of crop plants in Europe. Increasing resistance of aphids to insecticides and their side effects on the environment and non target organism's including human's stimulated research on alterative methods of aphid control, including the use of entomotoxic proteins. Lectins are carbohydrate binding proteins that are widely distributed in nature; they have been isolated from microorganisms, fungi, plants and animals. Several of these proteins were tested for their potential biocide effect on plenty of pests. A fungal lectin, namely Xerocomus Chrysenteron lectin (XCL) was previously purified and was shown to be toxic for several pests including aphids. XCL was clearly the most toxic lectin against M. persicae. In this work, bioassays using artificial diets incorporating a broad range of XCL concentrations (from 10 microg x ml(-1) to 5000 microg x ml(-1)) were developed to assess the negative effects of XCL on the biological parameters (development duration, weight and fecundity) of M. persicae a polyphagous aphid found on more than 400 host plant species and transmitting more than 100 viral diseases. A significant mortality of aphids was observed, corresponding to the LC50 and LC90 of 0, 46 and 6, 02 mg/ml respectively after 24hrs. Significant differences of M. persicae weight, development duration and fecundity (P < 0.05) was observed between the tested XCL concentrations. Conavalia ensifomris lectin (ConA) was included as lectin reference on the bioassay experiments and was shown to be less toxic and induced lower negative changes in M. persicae biological parameters when compared with XCL. [less ▲]

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See detailAphidophagous Guilds On Nettle (Urtica Dioica) Strips Close To Fields Of Green Pea, Rape And Wheat
Alhmedi, A.; Haubruge, Eric ULg; Bodson, Bernard ULg et al

in Insect Science (2007), 14(5), 419-424

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See detailElectrophysiological And Behavioral Activity Of Secondary Metabolites In The Confused Flour Beetle, Tribolium Confusum
Verheggen, François ULg; Ryne, C.; Olsson, P.-O. C. et al

in Journal of Chemical Ecology (2007), 33(3), 525-539

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See detailDépérissement de nos abeilles?
Nguyen, Bach Kim ULg; Widart, Joëlle ULg; De Pauw, Edwin ULg et al

Article for general public (2007)

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See detailHow does the age of hoverfly females affect their reproduction?
Almohamad, Raki; Verheggen, François ULg; Francis, Frédéric ULg et al

in Communications in Agricultural and Applied Biological Sciences (2007), 72(3),

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See detailÉvaluation de la diversité des pucerons et de leurs ennemies en grandes cultures à proximité de parcelles d’orties
Alhmedi, Ammar; Francis, Frédéric ULg; Bodson, Bernard ULg et al

in Notes Fauniques de Gembloux (2007), 60

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