References of "Bodson, Bernard"
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See detailA PHEROMONE TRAP MONITORING SYSTEM FOR THE SADDLE GALL MIDGE, Haplodiplosis marginata (von Roser) (DIPTERA: CECIDOMYIIDAE)
Censier, Florence ULiege; Heuskin, Stéphanie ULiege; SAN MARTIN Y GOMEZ, Gilles et al

in Crop Protection (2015), 80

Outbreaks of saddle gall midge, Haplodiplosis marginata (von Roser) (Diptera: Cecidomyiidae) have been reported in Belgium and other European countries since 2010. Because of the sporadic nature of this ... [more ▼]

Outbreaks of saddle gall midge, Haplodiplosis marginata (von Roser) (Diptera: Cecidomyiidae) have been reported in Belgium and other European countries since 2010. Because of the sporadic nature of this pest, which can sometimes be very harmful to cereal crops, an effective monitoring tool is required, both to determine the optimal timing for insecticide applications, and to understand the enigmatic population dynamics of this insect. Following the recent identification of the major sex pheromone component of the saddle gall midge, non-2-yl butanoate, a slow-release dispenser was developed using rubber septa. The release rates of 5 mg and 10 mg-loaded dispensers were initially measured under laboratory conditions, and their effectiveness in terms of pheromone loading and use duration was assessed in the field. The experiments showed that sticky traps baited with 5 mg pheromone-loaded rubber dispensers, renewed every 6 weeks, are suitable for accurately monitoring male H. marginata flights. [less ▲]

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See detailUse of NIR hyperspectral imaging and chemometrics to quantify roots and crop residues in soil
Eylenbosch, Damien ULiege; Fernández Pierna, Juan Antonio; Baeten, Vincent et al

Poster (2015, October)

Discrimination of roots and crop residues, in order to quantify them, based on their Near Infrared spectral signature and chemometrics was tested as a new rapid and reliable method.

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See detailUse of Near Infrared Hyperspectral Imaging in studies on root systems
Eylenbosch, Damien ULiege; Fernández Pierna, Juan Antonio; Fraipont, Guillaume ULiege et al

Conference (2015, September 21)

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See detail5. Froment 2015: Enfin une récolte sereine
Sinnaeve, Georges; Gofflot, S.; Chandelier, Anne et al

in Bodson, Bernard; Watillon, Bernard (Eds.) Livre Blanc Céréales (2015, September 10)

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See detailLivre Blanc Céréales
Sinnaeve, Georges; Gofflot, S.; Chandelier, anne et al

in Bodson, Bernard; Watillon, Bernard (Eds.) Livre Blanc Céréales (2015, September 10)

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See detail3. Variétés - 2. Escourgeon et orge d'hiver fourragers
Monfort, Bruno; Mahieu, Olivier; Jacquemin, Guillaume et al

in Bodson, Bernard; Watillon, Bernard (Eds.) Livre Blanc Céréales (2015, September 10)

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See detail3. Variétés - 1. Froment d'hiver
Meza Morales, Walter ULiege; Eylenbosch, Damien ULiege; Jacquemin, Guillaume et al

in Bodson, Bernard; Watillon, Bernard (Eds.) Livre Blanc Céréales (2015, September 10)

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See detail2. Implantation des cultures
Eylenbosch, Damien ULiege; Meza Morales, Walter ULiege; Monfort, Bruno et al

in Bodson, Bernard; Watillon, Bernard (Eds.) Livre Blanc Céréales (2015, September 10)

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See detailLivre Blanc Céréales
Bodson, Bernard ULiege; Watillon, Bernard ULiege

Book published by Gembloux Agro Bio Tech (2015)

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See detailQuantification of roots and crop residues by the use of near infrared hyperspectral imaging and chemometric tools
Eylenbosch, Damien ULiege; Fernández Pierna, Juan Antonio; Baeten, Vincent et al

Poster (2015, September)

In studies on root system development in fields, manual sorting of roots and crop residues extracted from soil samples before quantification is a tedious and time consuming step. Discrimination and ... [more ▼]

In studies on root system development in fields, manual sorting of roots and crop residues extracted from soil samples before quantification is a tedious and time consuming step. Discrimination and quantification of roots and crop residues based on their Near Infrared spectral signature was tested as a new rapid and reliable method. [less ▲]

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See detailDoes combining a wheat and pea mixture with methyl salicylate reduces aphid populations in both crops?
Chevalier Mendes Lopes, Thomas ULiege; Fassotte, Bérénice ULiege; Hatt, Séverin ULiege et al

Conference (2015, August 25)

Aphids are important pests of wheat and pea. Among the alternative methods to control them with less reliance on insecticides, crop associations already proved to be efficient. However, if increasing the ... [more ▼]

Aphids are important pests of wheat and pea. Among the alternative methods to control them with less reliance on insecticides, crop associations already proved to be efficient. However, if increasing the chemical and structural complexity of vegetation can disrupt their host plants location, the searching efficiency of predators and parasitoids can also be reduced. Therefore, these beneficials may not always be more abundant in such systems. Combining crop associations with attractive semiochemicals for natural enemies can be interesting to solve this problem. In this research, we compared the effect of a wheat and pea pure stand, wheat and pea mixture, and wheat and pea mixture combined with methyl salicylate (MeSA) formulated in alginate gel beads, on the abundance and diversity of aphids and their natural enemies. These were weekly observed on plants during 2013 and 2014 growing seasons. Over these two years, significantly higher numbers of pea aphids (Acyrthosiphon pisum (H.)) were observed in the pure stand of pea compared with both mixtures (with and without MeSA). No significant differences were observed between treatments for wheat aphids (Sitobion avenae (F.), Metopolophium dirhodum (W.) and Rhopalosiphum padi (L.)), which were significantly less abundant than pea aphids. Aphid natural enemies were mainly observed on pea plants. Hoverfly larvae abundance was not significantly different between treatments during both years. The same phenomenon occurred with hoverfly pupae in 2013, while these were significantly more abundant in both mixtures compared with the pure stand in 2014. However, their number did not differ significantly between the mixture with and without MeSA. Few ladybirds and lacewings were observed. No significant differences were observed between treatments for parasitoid mummies in 2013. Their abundance was significantly higher in the pure stand of pea compared with both mixtures in 2014. Results from this study show that mixing wheat and pea is an efficient method to maintain aphid populations at a very low level on pea. The use of MeSA did not show significant effects on natural enemies. However, mixing these crops may be enough to reduce aphid populations under an acceptable threshold. [less ▲]

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See detailSystematic analysis of site-specific yield distributions resulting from nitrogen management and climatic variability interactions
Dumont, Benjamin ULiege; Basso, Bruno; Leemans, Vincent ULiege et al

in Precision Agriculture (2015), 16(4), 361-384

At the plot level, crop simulation models such as STICS have the potential to evaluate risk associated with management practices. In nitrogen (N) management, however, the decision-making process is ... [more ▼]

At the plot level, crop simulation models such as STICS have the potential to evaluate risk associated with management practices. In nitrogen (N) management, however, the decision-making process is complex because the decision has to be taken without any knowledge of future weather conditions. The objective of this paper is to present a general methodology for assessing yield variability linked to climatic uncertainty and variable N rate strategies. The STICS model was coupled with the LARS-Weather Generator. The Pearson system and coefficients were used to characterise the shape of yield distribution. Alternatives to classical statistical tests were proposed for assessing the normality of distributions and conducting comparisons (namely, the Jarque-Bera and Wilcoxon tests, respectively). Finally, the focus was put on the probability risk assessment, which remains a key point within the decision process. The simulation results showed that, based on current N application practice among Belgian farmers (60 60 60 kgN ha-1), yield distribution was very highly significantly non normal, with the highest degree of asymmetry characterised by a skewness value of -1.02. They showed that this strategy gave the greatest probability (60%) of achieving yields that were superior to the mean (10.5 t ha-1) of the distribution. [less ▲]

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See detailDes bandes fleuries pour la lutte biologique : état des lieux, limites et perspectives en Wallonie – Une synthèse bibliographique.
Hatt, Séverin ULiege; Uyttenbroeck, Roel ULiege; Bodson, Bernard ULiege et al

in Entomologie Faunistique = Faunistic Entomology (2015), 68

Managing field margins takes part of the Agri-Environmental Measures supported by the European Union in Wallonia. Among possible infrastructures, wildflower strips are known to conserve a wide diversity ... [more ▼]

Managing field margins takes part of the Agri-Environmental Measures supported by the European Union in Wallonia. Among possible infrastructures, wildflower strips are known to conserve a wide diversity of insects, including natural enemies that can be mobilized to biologically control pests. However, the efficiency of pest control is not guaranteed. It depends mainly on the ability of flowers to attract natural enemies at the right time and to keep them in this environment while favoring their migration into adjacent crops. A reflection on the composition of the floral mixtures may optimize their capacity in biological control. In this context, this review paper put forward the interest of considering functional traits of flowers and presents the concept of functional diversity. Furthermore, the sown perennial wildflower strips should be maintained by regular mowing. However, mowing affects both insect and plant populations due to momentary destruction of the habitat. An appropriate management of field margins is therefore needed to optimize the pest control service provided. [less ▲]

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See detailImpacts of Plant Growth-Promoting Rhizobacteria on Wheat Growth under Greenhouse and Field Conditions
Nguyen, Minh ULiege; du Jardin, Patrick ULiege; Jijakli, Haissam ULiege et al

Poster (2015, June 16)

Plant Growth-Promoting Rhizobacteria (PGPR) are well-known on stimulating root growth, enhancing mineral availability, and nutrient use efficiency in crops, and therefore become promising tool for ... [more ▼]

Plant Growth-Promoting Rhizobacteria (PGPR) are well-known on stimulating root growth, enhancing mineral availability, and nutrient use efficiency in crops, and therefore become promising tool for sustainable agriculture. The aim of this project is to screen PGPR strains to enhance wheat growth and yield in combination with an optimised nitrogen (N) fertilizer dose, and thus finally reduce the use of N fertilizer with equivalent yield as the recommended N dose. A list of PGPR has been collected, including (1) Mix1 (a mix of Azospirillum sp., Azorhizobium sp., and Azoarcus sp.), (2) Mix2 (a mix of Mix1 plus with two strains phosphorus-solubilizing Bacillus sp.), (3) Bacillus amyloliquefaciens a, (4) Bacillus subtilis, and (5) Bacillus amyloliquefaciens b. The PGPR were screened in both greenhouse and field condition 2014. There was significant increase in root dry weight and in root per shoot ratio of plants inoculated with Mix1 in the greenhouse. Under field condition, besides the first factor PGPR, an additional factor, i.e. four N fertilizer doses, was applied in the combination with PGPR. Without or at low N fertilizer doses, the results showed that the grain yield declined significantly. The highest grain yield increase was fifteen per cent above the control and achieved by inoculating Bacillus subtilis without application of N fertilizer. However, there was statistically insignificant in all treatments due to variability between plot replicates. Based on these results, a modified protocol plus new strategies for PGPR selection has been built up for 2015 trial to reduce the influence of variability on field and possibly achieve the higher yield increase. [less ▲]

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See detailComparison of PLS and SVM discriminant analysis for NIR hyperspectral data of wheat roots in soil
Eylenbosch, Damien ULiege; Fernández Pierna, Juan Antonio; Baeten, Vincent et al

Poster (2015, June)

The aim of this work was to compare the chemometric tools PLS and SVM on near infrared spectra in order to reach the most accurate discrimination between spectra of soil, root and crop residues of winter ... [more ▼]

The aim of this work was to compare the chemometric tools PLS and SVM on near infrared spectra in order to reach the most accurate discrimination between spectra of soil, root and crop residues of winter wheat on hyperspectral images. [less ▲]

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See detailLa cécidomyie équestre quelle nuisibilité sur le blé?
Censier, Florence ULiege; Chavalle, Sandrine ULiege; San Martin Y Gomez, Gilles et al

in Phytoma : La Défense des Végétaux (2015), 685

Une équipe belge a évalué la nuisibilité de la cécidomyie Haplodiplosis marginata et en tire des conseils pour la protection du blé tendre d'hiver. Le tout est valable en France aussi!

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See detailAdapting Nitrogen management to the increasing climatic uncertainty
Dumont, Benjamin ULiege; Basso, Bruno; Bodson, Bernard ULiege et al

in Shirmohammadi, Adel; Bosch, David; Muñoz-Carpena, Rafa (Eds.) Proceedings of the 1st ASABE Climate Change Symposium - Adaptation and Mitigation (2015, May)

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See detailA comparison of within-season yield prediction algorithms based on crop model behaviour analysis
Dumont, Benjamin ULiege; Basso, Bruno; Leemans, Vincent ULiege et al

in Agricultural and Forest Meteorology (2015), 204

The development of methodologies for predicting crop yield, in real-time and in response to different agro-climatic conditions, could help to improve the farm management decision process by providing an ... [more ▼]

The development of methodologies for predicting crop yield, in real-time and in response to different agro-climatic conditions, could help to improve the farm management decision process by providing an analysis of expected yields in relation to the costs of investment in particular practices. Based on the use of crop models, this paper compares the ability of two methodologies to predict wheat yield (Triticum aestivum L.), one based on stochastically generated climatic data and the other on mean climate data. It was shown that the numerical experimental yield distribution could be considered as a log-normal distribution. This function is representative of the overall model behaviour. The lack of statistical differences between the numerical realisations and the logistic curve showed in turn that the Generalised Central Limit Theorem (GCLT) was applicable to our case study. In addition, the predictions obtained using both climatic inputs were found to be similar at the inter and intra-annual time-steps, with the root mean square and normalised deviation values below an acceptable level of 10% in 90% of the climatic situations. The predictive observed lead-times were also similar for both approaches. Given (i) the mathematical formulation of crop models, (ii) the applicability of the CLT and GLTC to the climatic inputs and model outputs, respectively, and (iii) the equivalence of the predictive abilities, it could be concluded that the two methodologies were equally valid in terms of yield prediction. These observations indicated that the Convergence in Law Theorem was applicable in this case study. For purely predictive purposes, the findings favoured an algorithm based on a mean climate approach, which needed far less time (by 300-fold) to run and converge on same predictive lead time than the stochastic approach. [less ▲]

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See detailEvaluation of soil structural changes through macroscopic and microscopic measurement
Parvin, Nargish ULiege; Degré, Aurore ULiege; Chelin, Marie ULiege et al

Poster (2015, April 16)

The heterogeneity of soil structure and pore size distribution are highly influenced by external factors like tillage systems and other agricultural management practices. However, changes in soil ... [more ▼]

The heterogeneity of soil structure and pore size distribution are highly influenced by external factors like tillage systems and other agricultural management practices. However, changes in soil hydrodynamic behavior are not fully understood and are still under research. Also, researchers have explained the impact of tillage practices on soil hydraulic properties related to pore size distribution, connectivity and orientation are involved but the characterization of these modifications and consequences remains a challenge. Furthermore, the relation between macroscopic measurements and microscopic investigation of the soil structure remains scarce. Recently, X-ray tomography (X- μCT) has been used in order to characterize changes in soil pore size distribution in various contexts and the method is able to link microtomography information to hydrodynamic measurement. In our study, X-μCT has been used in order to characterize changes in soil pore system. Since, tomography does not count most of the micropores, Richards’ pressure plate and evaporation method was also combined to get complete range of pore size distribution. We found good match between evaporation data with X-μCT at the macropore scale and evaporation data with pressure plate method at micropore scale. X-μCT data refines retention and hydraulic curves near saturation where Richards’ data alone can lead to numerous sets of fitted parameters. On the otherhand, evaporation data (Hyprop apparatus ©) provide comparable datasets with X-μCT. Combining micro and macroscopic measurements allows us to validate X-μCT information, which is otherwise not so obvious. [less ▲]

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See detailUse of NIR-HIS and dichotomist classification tree based on SVMDA models in order to discriminate roots and crop residues of winter wheat
Eylenbosch, Damien ULiege; Fernández Pierna, Juan Antonio; Baeten, Vincent et al

in EARSeL 2015: 9th EARSeL SIG Imaging Spectroscopy workshop, Luxembourg 14-16 April 2015 (2015, April 14)

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