References of "Schiffers, Bruno"
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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 ▲]

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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 ▲]

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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 ▲]

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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 ▲]

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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 ▲]

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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)

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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

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See detailDIIGO : COLLABORATIVE SOCIAL BOOKMARKING INTEGRATION IN AN INTERACTIVE COURSE
Colaux, Catherine ULg; Schiffers, Bruno ULg

in Edulearn12 Proceedings (2012)

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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 ▲]

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See detailLutte biologique et protection intégrée
Schiffers, Bruno ULg; Wainwright, Henry

Learning material (2011)

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See detailProduire de façon durable et responsable
Schiffers, Bruno ULg; Samb, Babacar

Learning material (2011)

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See detailOrganiser et animer des formations
Schiffers, Bruno ULg; Schiffers, Christophe ULg

Learning material (2011)

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See detailPrincipes d’hygiène et de management de la qualité sanitaire et phytosanitaire
Schiffers, Bruno ULg; Moreira, Christine

Learning material (2011)

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See detailRéglementation internationale et standards privés
Schiffers, Bruno ULg; Moreira, Christine

Learning material (2011)

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See detailSécurité des opérateurs et Bonnes Pratiques Phytosanitaires
Schiffers, Bruno ULg; Mar, Amie

Learning material (2011)

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See detailAnalyse des risques et autocontrôle en production
Schiffers, Bruno ULg; Samb, Babacar

Learning material (2011)

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See detailPrincipes d’hygiène et de management de la qualité sanitaire et phytosanitaire
Schiffers, Bruno ULg; Samb, Babacar; Knops, Jérémy

Learning material (2011)

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See detailCAPACITY BUILDING OF ACP EXPERTS AND MIDDLE MANAGERS
Schiffers, Bruno ULg

in EDULEARN10 Conference (2010, July)

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See detailEvaluation of realtime spray drift using RTDrift Gaussian advection-diffusion model
Lebeau, Frédéric ULg; Verstraete, Arnaud ULg; Schiffers, Bruno ULg et al

in Spanoghe, Pieter (Ed.) COMMUNICATIONS IN AGRICULTURAL AND APPLIED BIOLOGICAL SCIENCES (2009, May 19)

A spray drift model was developed to deliver real time information to the pesticide applicator. The sprayer is equipped with sensors to deliver real time measurement of operational parameters as spray ... [more ▼]

A spray drift model was developed to deliver real time information to the pesticide applicator. The sprayer is equipped with sensors to deliver real time measurement of operational parameters as spray pressure, boom height, horizontal boom movements and geolocalization. The spray droplet size spectrum as a function of pressure was characterized using PDI measurements. Wind speed and direction were measured using a sprayer mounted 2-D ultrasonic anemometer. For each successive boom position, a diffusion-advection Gaussian tilting plume model is used to compute the spray drift deposits downwind. Drift is computed independently for each droplet classes and each nozzle based on the operating parameters. Field trials were performed on a test plot in various wind conditions. The ground drift was measured for different drift distances using fluorimetry analysis. Results show that drift deposits are mainly affected by wind speed and direction what was correctly accounted for by the model. Short distance drift deposits values were overestimated by the model while long distance drift was underestimated. It appears that this most probably origins from embarked wind speed measurements and diffusion parameter. It is concluded that a treatment of embarked wind speed and diffusion measurement should be used to minimize these errors. [less ▲]

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See detailPlant protection at a crossroads in ACP countries
Schiffers, Bruno ULg

in Tunisian Journal of Plant Protection (2009), 4(1),

In Africa, and many other countries in the southern hemisphere (ACP - African, Caribbean and Pacific states), small farmers still practice subsistence farming, and the vast majority of producers of fruits ... [more ▼]

In Africa, and many other countries in the southern hemisphere (ACP - African, Caribbean and Pacific states), small farmers still practice subsistence farming, and the vast majority of producers of fruits and vegetables cultivate their crops over small plots of land, often for just a few weeks or a few months of the year. [less ▲]

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