RIS , Nicolas

Simple Summary: Augmentative biological control relies on the more or less frequent/abundant releases of biological control agents (BCAs) that have to be adapted to their short-term local environment including (micro-)climatic conditions. Thermal biology of BCAs is thus a key component for their success. The extent to which thermal tolerance...

En 2010, l'UMR « Institut Sophia Agrobiotech » s'est doté d'un nouveau bâtiment d'élevage pour les insectes réglementés, « Entomopolis ». Ce document a pour objectif de décrire cette infrastructure et de partager l'expérience acquise en ce qui concerne la maintenance, l'utilisation et l'évolution de la zone dédiée à des activités de RDLB...

La recherche et le développement de nouvelles méthodes de lutte biologique nécessitent un investissement important sur l'optimisation de l'élevage d'insectes (auxiliaires, hôtes ou prédateurs). Cet article décrit les procédures d'élevage d'un parasitoïde, Psyttalia lounsburyi, et de son hôte de substitution Ceratitis capitata. Cet article...

L'interaction entre un auxiliaire de lutte biologique, Psyttalia lounsburyi, et une bactérie endosymbiotique, Wolbachia, est à l'étude. Cet article aborde trois volets complémentaires à des résultats déjà publiés ou en cours de valorisation: (i) la caractérisation moléculaire multi-locus des deux variants bactériens connus, (ii) la mise au...

In response to the introduction and spread of the chestnut gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) in metropolitan France, including Corsica, the exotic parasitoid Torymus sinensis Kamijo (Hymenoptera: Torymidae) was deliberately introduced in more than 50 locations covering most of the areas of chestnut production....

Augmentative biological control is based on the repeated introduction of mass-produced biological control agents as predators or parasitoids with the aim of temporarily controlling or even eradicating pest populations. The different augmentative strategies form a continuum ranging from preventive releases of small numbers of natural enemies...

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Parasitoids and their hosts are linked by intimate and harmful interactions that make them well suited to analyze fundamental ecological and evolutionary processes with regard to life histories evolution of parasitic association. Drosophila aspects of what parasitoid Hymenoptera have become model organisms to study aspects that cannot be...

A bstract The rise of the Asian chestnut gall wasp Dryocosmus kuriphilus in France has benefited the native community of parasitoids originally associated with oak gall wasps by becoming an additional trophic subsidy and therefore perturbing population dynamics of local parasitoids. However, the successful biological control of this pest has...

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The effects of some abiotic (maternal photoperiod and offspring developmental temperature) and biotic (host quality during both maternal and offspring generations) factors on diapause induction were investigated for two sympatric strains of Trichogramma brassicae Bezdenko (Hym: Trichogrammatidae) differing by infection status with regard to...

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The spotted wing Drosophila, Drosophila suzukii (Ds), became a major economic pest for fruit production since its establishment in Europe and America. Among potential control methods, only classical biological control appears to be a mean of sustainably regulating Ds in both cultivated and natural habitats. In the frame of risk assessment,...

We report here the first observation of Zaprionus indianus Gupta in mainland France. Five specimens of both sexes were trapped in a liquid vinegar bait in Cap d'Antibes (French Riviera) and their taxonomic identification was then performed by morphologi-cal and molecular analysis. Z. indianus is recognized as a fig pest in the invaded American...

Environmental variation is classically expected to affect negatively population growth and to increase extinction risk, and it has been identified as a major determinant of establishment failures in the field. Yet, recent theoretical investigations have shown that the structure of environmental variation and more precisely the presence of...

Animal movement and behavior are critical to understanding ecological and evolutionary processes. Recent yearshave witnessed an increase in methodological and technological innovations in video-tracking solutions forphenotyping animal behavior. Although these advances enable the collection of high-resolution data describingthe movement of...

Classical biological control-the introduction of exotic species to permanently control pests-offers an applied framework to test ecological and evolutionary hypotheses derived from invasion biology. One such hypothesis is that intraspecific hybridization can facilitate invasions because hybrids express higher phenotypic mean and/or variance...

This paper is an addendum for the availability of the names of 11 new species proposed in Al khatib et al. (2014).

The systematics of the European species of Eupelmus (Eupelmus) Dalman (Hymenoptera: Eupelmidae) belonging to the urozonus-complex' is elucidated through combined molecular and morphological characterization. One mitochondrial gene fragment (Cytochrome oxidase I) and one nuclear protein-coding gene fragment (Wingless) were sequenced and the...

Propagule pressure, i.e. the number of individuals introduced, is thought to be a major predictor of the establishment success of introduced populations in the field. Its influence in laboratory experimental systems has however been questioned. In fact, other factors involved in long-term population persistence, like habitat size, were usually...

Cucurbitaceae represent an important part of the vegetable production in Martinique. One of the main pest on these crops is the melonworm, Diaphana hyalinata. With the final objective of defining sustainable strategies for the management of this pest with low quantities of pesticides, an inventory of the Trichogramma egg parasitoids was...

Abstract Wolbachia pipientis is an intracellular bacterium that infects many insects and other arthropods. Cytoplasmic incompatibility (CI) is one of several effects that Wolbachia has on its hosts. In its simplest form, CI causes host reproductive failure when an uninfected female mates with an infected male. Theoretically, this has two...

The current study extends the faunistic survey ofTrichogrammaspecies parasitizing ECB to all agricultural growing regions in Serbia. Specimens ofTrichogrammawere reared from parasitized egg masses of ECB collected from field-grown corn and pepper crops. The number of egg masses parasitized varied by location. Using sequences of mitochondrial...

In theory, the introduction of individuals infected with an incompatible strain of Wolbachia pipientis into a recipient host population should result in the symbiont invasion and reproductive failures caused by cytoplasmic incompatibility (CI). Modelling studies combining Wolbachia invasion and host population dynamics show that these two...