References of "Schiffers, Bruno"
     in
Bookmark and Share    
Full Text
See detailOptimisation de la rétention des produits phytosanitaires sur une surface superhydrophobe
Ouled Taleb Salah, Sofiene ULg; Massinon, Mathieu ULg; Schiffers, Bruno ULg et al

in Journée Nationale sur la valorisation des Résultats de la Recherche dans le Domaine des Grandes Cultures (2014, April 17)

La protection des cultures est principalement réalisée en Tunisie par l’application de bouillies phytosanitaires à base d’eau. Au niveau de l’impact des gouttes sur le feuillage, trois types de ... [more ▼]

La protection des cultures est principalement réalisée en Tunisie par l’application de bouillies phytosanitaires à base d’eau. Au niveau de l’impact des gouttes sur le feuillage, trois types de comportement sont observés, à savoir l’adhésion, le rebond et la fragmentation. Ces types d’impact affectent la rétention par le feuillage et dépendent de la taille et de la vitesse des gouttes, des propriétés physico-chimiques de la bouillie et de la mouillabilité des surfaces foliaires. Une technique d’imagerie rapide a permis d’évaluer la pertinence de l’utilisation d’adjuvants tensio-actifs en vue d’améliorer la rétention en agissant sur le type d’impact. Des essais de rétention sur feuilles de vulpin, surface très peu mouillables ou superhydrophobe, montrent que l’ajout d’un adjuvant 0,1 %v/v dans l’eau contribue à l’amélioration des dépôts. La proportion d’adhésion a augmenté alors que celle du rebond a diminué. Cette technique en laboratoire est un outil efficace pour évaluer les pratiques culturales des agriculteurs et de fournir des conseils et recommandations pratiques en fonction des cibles. [less ▲]

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailChapitre 9. Retour d’expérience. Institutions internationales - Chap. 9.4. Approche opérationnelle du PIP dans le soutien des petits producteurs africains face aux standards privés
STINGLHAMBER, Guy; Schiffers, Bruno ULg

in HAMMOUDI, Abdelhakim; GRAZIA, Cristina; SURRY, Yves (Eds.) Sécurité sanitaire des aliments : Régulation, analyses économiques et retours d'expérience (2014)

Les crises sanitaires de ces dernières années (E. coli, vache folle, poulet à la dioxine) ont fait prendre conscience de façon particulièrement violente des dangers liés à un développement non maîtrisé de ... [more ▼]

Les crises sanitaires de ces dernières années (E. coli, vache folle, poulet à la dioxine) ont fait prendre conscience de façon particulièrement violente des dangers liés à un développement non maîtrisé de systèmes agricoles intensifs et fortement industrialisés. L’évolution de la régulation au niveau international se heurte cependant à la difficulté de concilier, d’une part, l’efficacité des mesures sur le plan sanitaire et, d’autre part, l’assurance d’un bon fonctionnement de l’activité économique. Cet ouvrage propose un état des lieux des démarches de sécurité des aliments existantes ainsi qu’une série d’analyses critiques sur les méthodes et les instruments de régulation utilisés aux niveaux national et international dans le contexte actuel de forte interdépendance des économies des pays en développement et des pays développés. Une des originalités de cet ouvrage consiste dans la mise en perspective d’analyses de chercheurs et des retours d’expérience de professionnels des deux hémisphères du globe et d’institutionnels directement concernés par la question. Sécurité sanitaire des aliments s’adresse à tous les acteurs de l’agroalimentaire qu’ils soient étudiants, industriels ou chercheurs. [less ▲]

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailUse of rotary atomiser to optimize retention on barley leaves while reducing driftable droplets
Ouled Taleb Salah, Sofiene ULg; Massinon, Mathieu ULg; Boukhalfa, Hassina dite Hafida ULg et al

in International Advances in Pesticide Application, Aspects of Applied Biology 122 (2014, January)

Controlled Droplet Application using rotary atomiser is based on an improved control of droplet size and trajectory comparatively to hydraulic nozzles. On the basis of literature, it was stated that the ... [more ▼]

Controlled Droplet Application using rotary atomiser is based on an improved control of droplet size and trajectory comparatively to hydraulic nozzles. On the basis of literature, it was stated that the use of 60° forward angled spray combined with the narrow drop size distribution of a rotary atomiser could lead to low drift and high retention on monocotyledonous and superhydrophobic weeds at early stage. A Micromax120 atomiser was tuned to emit 270 µm VMD, 60° angled forward, to increase interception by the canopy structure. A spray mixture containing a superspreader adjuvant was used to avoid drop bouncing. An increase of spray retention comparatively to a Teejet 11002 at 1.4 bars was observed, although not proved statistically significant by these preliminary trials. On the drift side, the tilted spinning disc seemed to be advantageous since droplet spectra contains a low percentage of droplets under 100 µm and presents an ejection velocity of 25 m.s-1 at 5000 RPM. The spray drift was reduced about 50%. However, these setting were not found as efficient as expected. Indeed, angled spray proved to be more sensitive to advection and turbulence, as the spray was more exposed to the airflow than for the vertical position. It appears that angling the spray and choosing a drop size spectrum with a Volume Median Diameter as big as 270 µm is not sufficient to reduce significantly this issue. Some alternatives as decreasing the emission height are possible with angled sprays but require height control that seems difficult to reach in practical situations. [less ▲]

Detailed reference viewed: 67 (19 ULg)
Full Text
Peer Reviewed
See detailMeasuring the general phytosanitary situation: development of a plant health barometer
Wilmart, Olivier; Van Huffel, Xavier; Diricks, Herman et al

in European Journal of Plant Pathology (2014), Online First Articles

The development of a plant health barometer, an instrument to measure the general phytosanitary situation on a national level (Belgium) and on a yearly basis and to monitor its evolution over time, is ... [more ▼]

The development of a plant health barometer, an instrument to measure the general phytosanitary situation on a national level (Belgium) and on a yearly basis and to monitor its evolution over time, is described. The elaboration of a set of 13 plant health indicators (PHI’s) as the basis for the plant health barometer is discussed. These indicators were weighted by experts - including scientists, policy makers and agroindustrial representatives - to determine their relative impact in the barometer. The result of the barometer is expressed as a comparison with the previous year. Based on the results of the 13 PHI’s, it is concluded that the general plant health in Belgium shows a positive evolution from 2007 until 2010 and a negative evolution from 2010 until 2012. The plant health barometer provides a overview of the phytosanitary situation of plants and plant products in Belgium and is a tool to communicate in an intelligible, comprehensible manner on aspects of plant health to consumers and professional stakeholders in the plant production chain. Together with the food safety barometer and the animal health barometer, the plant health barometer is one of the three instruments to provide a overview on the general status of the safety of the food chain in Belgium. [less ▲]

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailEffects of a commercial formulation of a plant resistance elicitor on non-target organisms
Jansen, Jean-Pierre; Buenotesta, Raphaël; Schiffers, Bruno ULg

in Bulletin OILB/SROP = IOBC/WPRS Bulletin (2014), 103

The toxicity of Fyto11, a plant resistance elicitor commercial formulation used to increase the natural resistance of Cucurbitaceae (cucumber, zucchini and melon) and Solanaceae (tomato and sweet pepper ... [more ▼]

The toxicity of Fyto11, a plant resistance elicitor commercial formulation used to increase the natural resistance of Cucurbitaceae (cucumber, zucchini and melon) and Solanaceae (tomato and sweet pepper) against powdery mildew under greenhouse conditions, has been assessed on several beneficial arthropods: the honeybee Apis mellifera, the predatory miteTyphlodromus pyri, the aphid parasitic wasp Aphidius rhopalosiphi and the aphid predator Episyrphus balteatus. Tested at 0.5% and 1.0% spray dilution on plants, Fyto11 did not lead to significant corrected mortalities for E. balteatus larvae and adult wasps of A. rhopalosiphi, with a maximum of 5.4% mortality. No effects on reproduction capacity of the parasitic wasps were observed. The exposure of T. pyri protonymphs to Fyto11 on glass plates lead to corrected mortalities of 1.1% and 32.6% at 0.5% and 1.0% and to a reduction of female fertility of 9.0% and 25.4%, compared to the control performance. When assessed on the honeybee by contact and oral exposure, Fyto11 did not lead to significant effects, with LD50 estimated as > 10 μg a.i./bee (oral) and 12.5 μg a.i./bee (contact), leading to HQ ratio < 50 and classifying the product at no or low risk for honeybees. These results showed that the product was harmless for all beneficials at the proposed commercial rate, except for T. pyri at 1.0% on glass plates, where the product was rated as slightly harmful. Even if all the beneficial species’ diversity has not been assessed with this product, negative effects on non-target organisms are not expected in field conditions and Fyto11 can be considered as compatible with IPM programs. [less ▲]

Detailed reference viewed: 30 (1 ULg)
Full Text
Peer Reviewed
See detailMeasuring the general phytosanitary situation: development of a plant health barometer
Wilmart, Olivier; Van Huffel, X.; Diricks, H. et al

Poster (2014)

Objective: measuring and monitoring the yearly evolution of the general plant health (phytosanitary situation) of plants and plant products in Belgium in an objective manner, and communicating about it in ... [more ▼]

Objective: measuring and monitoring the yearly evolution of the general plant health (phytosanitary situation) of plants and plant products in Belgium in an objective manner, and communicating about it in a comprehensive way. [less ▲]

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailA new oil-based formulation of Trichoderma asperellum for the biological control of cacao black pod disease caused by Phytophthora megakarya
Mbarga, J.B.; Begoude, B.A.D.; Ambang, Z. et al

in Biological Control (2014), 77

In African cacao-producing countries, control of cacao black pod disease caused by hytophthora megakarya is a priority. Introducing biological control agents as part of a P. megakarya control strategy is ... [more ▼]

In African cacao-producing countries, control of cacao black pod disease caused by hytophthora megakarya is a priority. Introducing biological control agents as part of a P. megakarya control strategy is highly desirable, especially in a perspective of pesticide reduction. Trichoderma species are among the most used biological control agents. In Cameroon, Trichoderma asperellum formulated in wettable powder has produced positive effects against this disease. However, with this type of formulation, shelf-life and persistence of conidia on pods are limited. Our study therefore sought to develop a new T. asperellum formulation that would be more effective and better suited to the conditions of field application by small-scale producers in Cameroon. We selected a soybean oil-based oil dispersion, in which the half-life of the conidia reached 22.5 weeks, versus 5 weeks in aqueous suspension. Tested on detached pods, the formulation completely inhibited the development of the disease. When sprayed in the field on cacao clones highly sensitive to P. megakarya, the formulation resulted in 90% protection of treated pods after 1 week, and 50% after 3.2 weeks. The formulations exercised a measurable effect for up to 7 weeks, versus 2 weeks in the case of an aqueous conidial suspension and 5 weeks for that of a conventional fungicide (Kocide). Trichoderma asperellum formulated in oil dispersion has therefore great potential for the control of cacao black pod disease with less recourse to synthetic fungicides. [less ▲]

Detailed reference viewed: 26 (3 ULg)
Full Text
See detaileLearning COLEACP : un dispositif de formation au service des professionnels du secteur agricole en Afrique
Prunier, Emmanuelle; Le Hung, Florian; Schiffers, Bruno ULg

in ELearning Africa 2014 - Book of Abstracts (2014)

Le dispositif de formation à distance du COLEACP (Comité de Liaison Europe-Afrique-Caraïbes-Pacifique) est une composante d'un système complet de formation dédié au renforcement des capacités des ... [more ▼]

Le dispositif de formation à distance du COLEACP (Comité de Liaison Europe-Afrique-Caraïbes-Pacifique) est une composante d'un système complet de formation dédié au renforcement des capacités des opérateurs des filières agricoles des pays ACP (Afrique Caraïbes et Pacifique). [less ▲]

Detailed reference viewed: 30 (1 ULg)
Full Text
Peer Reviewed
See detailChapitre 9. Retour d'expériences : institutions internationales. Partie 9.4.: Approche opérationnelle du PIP dans le soutien des petits producteurs africains face aux standards privés
Schiffers, Bruno ULg; Stinglhamber, Guy

in Hammoudi, Abdelhakim; Grazia, Cristina; Surry, Yves (Eds.) et al Sécurité sanitaires des aliments (2014)

Detailed reference viewed: 11 (4 ULg)
Full Text
Peer Reviewed
See detailEfficacy of Trichoderma asperellum oil formulations on the control of Cocoa Black Pod Disease (Phytophthora megakarya)
Mbarga, J.B.; Martijn Ten Hoopen, G.; Begoude, A.D. et al

in Communications in Agricultural and Applied Biological Sciences (2012), 77(3), 65-74

Detailed reference viewed: 21 (2 ULg)
Full Text
Peer Reviewed
See detailDIIGO : COLLABORATIVE SOCIAL BOOKMARKING INTEGRATION IN AN INTERACTIVE COURSE
Colaux, Catherine ULg; Schiffers, Bruno ULg

in Edulearn12 Proceedings (2012)

Detailed reference viewed: 40 (14 ULg)
Full Text
See detailGuide destiné à la formation d’animateurs pour les « animations pédagogiques »
Schiffers, Bruno ULg; Gilson, Julien; Prunier, Emmanuelle et al

Book published by édité par le COLEACP (2011)

Detailed reference viewed: 65 (17 ULg)
Full Text
Peer Reviewed
See detailGuide d'autocontrôle pour la filière Litchi
ANDREAS, Christophe; BEMANANJARA, Ambinintsoa Tiana; RABEMANANJARA, Heritiana et al

in Guide d'autocontrôle pour la filière Litchi - Version 1.0 (2011)

Detailed reference viewed: 11 (0 ULg)
Full Text
See detailLa traçabilité
Schiffers, Bruno ULg

Book published by COLEACP (2011)

Au sens étymologique, la « traçabilité » est liée à la « trace » qui, au sens figuratif est une « marque laissée par un événement ». Tracer peut aussi signifier « indiquer la voie à suivre » ou encore « ... [more ▼]

Au sens étymologique, la « traçabilité » est liée à la « trace » qui, au sens figuratif est une « marque laissée par un événement ». Tracer peut aussi signifier « indiquer la voie à suivre » ou encore « marquer les contours ». Le mot « traçabilité », au sens de la possibilité d’identifier l’origine et de reconstituer le parcours (d’un produit), depuis sa production jusqu’à sa diffusion, est relativement récent1. Née dans le milieu des années 80, la traçabilité répondait alors à un simple souci logistique : elle garantissait un contrôle des flux de marchandises au sein d’une chaîne de partenaires, permettant de sérieuses économies. [less ▲]

Detailed reference viewed: 34 (8 ULg)
Full Text
Peer Reviewed
See detailExposure of several Belgian consumer groups to pesticide residues through fresh fruit and vegetable consumption
Claeys, Wendie L.; Schmit, Jean-François; Bragard, Claude et al

in Food Control (2011), 22(3-4), 508-516

The output of a pesticide surveillance program (detection frequency and number of exceeding measures) can lead to unnecessary concern among consumers since they lack information concerning the actual ... [more ▼]

The output of a pesticide surveillance program (detection frequency and number of exceeding measures) can lead to unnecessary concern among consumers since they lack information concerning the actual exposure. In this study, the exposure to pesticide residues through fruit and vegetable consumption is evaluated based on the 2008 surveillance data of the Belgian Federal Agency for the Safety of the Food Chain (FASFC). Results (deterministic and probabilistic approach) demonstrate that the chronic exposure of the adult population (>15 years) is generally under control, even at high or frequent consumption of fruit and vegetables. For most of the pesticide residues studied, the exposure is one hundred times lower than the ‘acceptable daily intake’ or ADI. With regard to children (2e5 years) who consume regularly or large amounts of fruit and vegetables, there are however, indications that for some pesticides the ADI can be exceeded. Nevertheless, due to the large uncertainty in these calculations, a more detailed study is required for this vulnerable group of consumers. In addition, it was demonstrated that washing and peeling of fruit and vegetables result in an exposure that is probably five to six times lower. [less ▲]

Detailed reference viewed: 12 (1 ULg)
See detailLutte biologique et protection intégrée
Schiffers, Bruno ULg; Wainwright, Henry

Learning material (2011)

Detailed reference viewed: 50 (7 ULg)
See detailProduire de façon durable et responsable
Schiffers, Bruno ULg; Samb, Babacar

Learning material (2011)

Detailed reference viewed: 34 (4 ULg)
See detailPrincipes d’hygiène et de management de la qualité sanitaire et phytosanitaire
Schiffers, Bruno ULg; Moreira, Christine

Learning material (2011)

Detailed reference viewed: 22 (5 ULg)
See detailRéglementation internationale et standards privés
Schiffers, Bruno ULg; Moreira, Christine

Learning material (2011)

Detailed reference viewed: 25 (3 ULg)
See detailSécurité des opérateurs et Bonnes Pratiques Phytosanitaires
Schiffers, Bruno ULg; Mar, Amie

Learning material (2011)

Detailed reference viewed: 30 (4 ULg)