Clusters formation in Eisenia fetida (Oligochaeta, Lumbricidae)

in 17th Benelux Congress of Zoology Classic Biology in Modern Times (2010)

A new case of consensual decision: collective movement in earthworms

in Ethology (2010), 115

Bacillus-based biocontrol of Fusarium disease on tomato cultures in Burundi

Poster (2009, May 19)

Evaluation en in vitro de l'activite biofongicide des huiles essentielles contre 3 phytopathogenes

Conference (2009)

Etude des séries chronologiques par les méthodes de décomposition

in Notes de Statistique et d'Informatique (2009), (1), 1-17

This note briefly describes the main methods of analysing time series by a decomposition into a trend, a seasonal variation, and residuals. The methods are illustrated by an example analysed with Minitab ... [more ▼]

This note briefly describes the main methods of analysing time series by a decomposition into a trend, a seasonal variation, and residuals. The methods are illustrated by an example analysed with Minitab software. [less ▲]

Interlaboratory Evaluation Of Two Reverse-Transcriptase Polymeric Chain Reaction-Based Methods For Detection Of Four Fruit Tree Viruses

in Annals of Applied Biology (2009), 154(1), 133-141

Effect of essential oils on the in vitro growth of penicillium digitatum and penicillium italicum infecting citrus and of colletotrichum musea infecting banana

Poster (2008)

Potato (Solanum Tuberosum L.) Tuber Physiological Age Index Is A Valid Reference Frame In Postharvest Ageing Studies

in Postharvest Biology & Technology (2008), 50(1), 103-106

Essential yield components of potato crops are influenced by the physiological age of the tubers at planting. Previous studies have attempted to develop biophysical, physiological or biochemical markers ... [more ▼]

Essential yield components of potato crops are influenced by the physiological age of the tubers at planting. Previous studies have attempted to develop biophysical, physiological or biochemical markers of potato tuber ageing. This research note focuses on characterising a physiological age index (PAI) based on sprouting parameters and originally developed by Caldiz et al. [Caldiz, D.O., Fernandez, L.V., Struik, P.C., 2001. Physiological age index: a new, simple and reliable index to assess the physiological age of seed potato tubers based on the haulm killing date and length of the incubation period. Field Crop. Res. 69, 69–79]. The PAI progression of two cultivars (‘Bintje’ and ‘Désirée’) was measured and modelled over 2 harvest years. The preliminary results were consistent with other ageing markers such as the incubation period (IP) and desprouting sensitivity. Under our experimental conditions, the PAI allowed us to describe cultivar-specific and harvest year-specific age variations measured from the time the haulm (foliage) was killed and the mother plant's influence on the tubers was no longer present. By contrast, the IP data displayed a higher inherent variability that impaired their discrimination ability. Critical PAI values corresponding to the main postharvest developmental steps (e.g., dormancy, apical dominance, multiple sprouting) were then identified on the basis of emergence pattern data, allowing us to propose this index as a useful reference frame for future ageing studies. [less ▲]

Density-Dependent Reproductive Success In Tribolium Castaneum (Herbst) (Coleoptera : Tenebrionidae)

in Journal of Stored Products Research (2008), 44(3), 285-289

Two strains of Tribolium castaneum, one being susceptible to malathion (Asm) and the other malathion-specific resistant (PRm), were used to assess the effect of population density and its interaction with ... [more ▼]

Two strains of Tribolium castaneum, one being susceptible to malathion (Asm) and the other malathion-specific resistant (PRm), were used to assess the effect of population density and its interaction with genetic background in reproductive success. A highly significant allometric relationship between female body weight and fecundity (R2=0.413) and another between female body weight and larval survivorship (R2=0.561) were found. Data showed that population density exerted an indirect effect on the reproductive success. The body weight of the Asm female was not affected by variations in population density but the body weight of the PRm female increased with reduced population density. The genetic background (strain) and/or malathion-specific resistance greatly influenced reproductive success. Concerning the percentage survivorship of offspring of the two strains, there was an opposite trend with increased population density: in PRm, survivorship was lower at high density (76.64±13.75; mean±SD) and higher at low density (88.39±7.61), whereas in Asm, survivorship was higher at high density (53.39±15.57) and lower at low density (43.99±20.08). The PRm female laid more eggs than the Asm. Reproductive success was significantly higher in PRm than in Asm. In addition, the genetic background (the strain) and/or the pleiotropic effect of malathion-specific resistance had a significant effect on the fecundity of PRm because the differences in fecundity and reproductive success between Asm and PRm went beyond the body weight of the female and might be explained by their genetic background and/or the pleiotropic effect of malathion-specific resistance. [less ▲]

Etude longitudinale d’essais multilocaux : apports du modèle mixte

Conference (2007, April 25)