Is durum wheat-winter pea intercropping efficient to reduce pests and diseases ?

Intercropping (IC) is known as an agricultural practice which can improve the use of environmental resources (light, nutrients and water) resulting in yield advantages compared to sole cropping (SC) (Willey, 1979) particularly in low input systems. But, diseases ands pests can strongly affect both yield and grain quality in such systems. Now, numerous studies have shown significant reductions in harmful insects and on diseases in IC compared to SC of the same species (Vandermeer, 1989; Kinane and Lyngkjaer, 2002) even if others studies did not confirmed these foundings. The aim of our study was to evaluate the assumption that IC can reduce pea pests (green aphids and weevils), pea ascochyta and main durum wheat diseases (mildew, brown rust, fusarium and septoria)

Diplomata Belgica: les sources diplomatiques des Pays-Bas méridionaux au Moyen Âge. The Diplomatic Sources from the Medieval Southern Low Countries

Diplomata Belgica offers a critical survey of all the diplomatic sources (various types of charters and deeds), edited or still unpublished, and issued by both natural persons and legal bodies from the medieval Southern Low Countries. Diplomata Belgica covers present day Belgium as well as those areas which belonged historically to the Southern Low Countries but are part now of France (French Flanders, French Hainault), the Netherlands (parts of the provinces of Zeeland, Noord-Brabant, Limburg), the Grand Duchy of Luxembourg or Germany (parts of the Rhineland). The database aims at exhaustivity for the period before 1250 and will, in the future, also include late medieval diplomatic materials without striving after completeness

The chemical ecology of Harmonia axyridis

peer reviewedIn the recent SI of BioControl and resultant book from this working group (Roy et al., 2012), we contributed a review paper on the chemical ecology of the invasive aphidophagous ladybird Harmonia axyridis (Sloggett et al., 2011). This paper focused on both the pure and applied aspects of this subject, including sections on: (1) chemical defence; (2) foods, feeding and reproduction; (3) H. axyridis chemistry, humans and human activity, and (4) future research perspective

First report of fatty acid-derived alkaloids produced by species of the ladybird genus Scymnus (Coccinellidae: Coleoptera)

ABSTRACT: Species in the genus Scymnus Kugelann are common, but there is little information available on their defence compounds. Pupae are covered with setae on tips of which there are small droplets of liquid. This study explored the patterns of the distribution of the droplets and the influence of diet on their production in five species of Scymnus. GC-MS analyses were used to determine the chemical identity of droplets. All these species produced droplets, but the patterns in the distributions varied among species. Preliminary data indicates a de novo synthesis of the droplet compounds by these ladybirds. The results of the GC-MS analyses suggest that Scymnus spp. produce azamacrolides, which are fatty acid-derived alkaloids.info:eu-repo/semantics/publishedVersio

Spécialisation écologique chez les insectes prédateurs

TOULOUSE3-BU Sciences (315552104) / SudocSudocFranceF

Régulation de la ponte chez la coccinelle aphidiphage Adalia bipunctata (L.) (Coleoptera : Coccinellidae)

TOULOUSE3-BU Sciences (315552104) / SudocSudocFranceF

Non-additive effects of simulated heat waves and predators on prey phenotype and transgenerational phenotypic plasticity

International audienc