Nos grandes cultures captent aussi le CO2

in Nouvelles du Printemps (Les) (2007), (2ème trimestre 2007), 30-31

Livre Blanc Céréales - Gembloux

Book published by Gembloux Agro-Bio Tech - Edition février 2007 (2007)

Les régulateurs de croissance

in Livre Blanc: Céréales - Gembloux (2007, February 28)

Qualité: Aperçu de l'année écoulée - Récolte 2006: pire, ça n'existe peut être pas!

in Livre Blanc: Céréales - Gembloux (2007, February 28)

Variabilité importante des caractéristiques des amidons de blés indigènes: vers une utilisation diférenciée des lots (synthèse de 4 années de récolte)

Conference given outside the academic context (2007)

Effets de l’interaction entre la dureté des grains et le mode de présentation du blé sur la digestion de l’amidon chez le poulet de chair.

in journées de la recherche avicole (2007)

This study investigates the effect of interaction between hardness of grains and modality of wheat (Triticum aestivum L.) presentation on starch digestion in broiler chickens. A digestive trial (without ... [more ▼]

This study investigates the effect of interaction between hardness of grains and modality of wheat (Triticum aestivum L.) presentation on starch digestion in broiler chickens. A digestive trial (without starvation) was conducted (d 34 to d 38) with 108 chickens (Ross) divided in 36 groups. Two varieties of wheat were included at 60 % in diets: Deben (soft, hardness = 27) and Folio (hard, hardness = 82). The first modality of presentation (Fine) corresponded to finely milled wheat (hammer mill, sieve of 2 mm). The second (Coarse) was related to coarsely milled wheat (hammer mill, sieve of 5 mm). The third dietary treatment (Whole) corresponded to 10 % whole wheat between d 10 to d 17, 20 % from d 17 to d 24 and 30 % after d 24. Hardness (varieties), modalities of presentation and their interaction did not influence ingested starch (p > 0.05). Hardness interacted significantly (p < 0.05) with presentation of wheat on excreted starch and starch digestibility. But quantities of digested starch were not significantly different between the six treatments (p > 0.05). The starch digestibility of Folio-Fine was significantly (p < 0.05) lower than five other treatments. Moreover, starch digestibility of Whole was (p < 0.05) better than Coarse for Deben only. On the other hand, starch digestibility was not significantly different between Deben-Coarse and Folio-Coarse (p > 0.05). Similarly, starch digestibility of Deben-Whole was not significantly different than Folio-Whole (p > 0.05). In conclusion, fine milling (2 mm) of hard variety (Folio) was involved in reduction of starch digestibility. [less ▲]

Centre Pilote wallon des Céréales et Oléo-Protéagineux (CePiCOP)

Report (2007)

Présentation des essais réalisés sur les bandes messicoles

Diverse speeche and writing (2007)

Intraguild interactions of aphidophagous predators in fields: effect of Coccinella septempunctata and Episyrphus balteatus occurrence on aphid infested plants.

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 ▲]

Towards a carbon balance at the Lonzée crop site

Conference (2007)