WAROT , Sylvie

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...

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...

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The binary toxin (Bin) from Bacillus sphaericus exhibits a highly insecticidal activity against Culex and Anopheles mosquitoes. The cytotoxicity of Bin requires an interaction with a specific receptor present on the membrane of midgut epithelial cells in larvae. A direct correlation exists between binding affinity and toxicity. The toxin binds...

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...

Telenomus kolbei is newly reported in France, parasitizing two new host species: Aglais io and Nymphalis antiopa. Oviposition by the parasitoid into eggs of both species was observed. Films were made, to which links are given. DNA sequences were obtained and deposited in Genbank.

Les recherches en agronomie reposent souvent sur l'utilisation de ressources biologiques gérées de façon très variable en termes de (i) durée de conservation, (ii) formalisation des procédures, (iii) gestion de l'information et (iv) ouverture à l'extérieur. Dans ce contexte, les CRB (centres de ressources biologiques) représentent un...

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...

In the framework of biological control, the selection of effective natural enemies determines the final pest control. Thus, the genetic improvement of biocontrol agents could enhance the efficiency of biocontrol programs. Although promising, this approach has rarely been applied in this field. At the intraspecific level, hybridization between...

Considered as a major pest of Castanea species worldwide, the chestnut gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera, Cynipidae) can induce fruit production losses of 60-80%. Reported for the first time in Italy in 2002, this pest is now widespread across the French distribution of chestnut trees.Based on successful attempts in other...

Native to China, the chestnut gall wasps Dryocosmus kuriphilus Yasumatsu (Hymenoptera, Cynipidae) has invaded several countries on three continents in about half a century. To reduce the negative impact on the chestnut industry, the hymenopteran parasitoid Torymus sinensis Kamijo (Hymenoptera, Torymidae) was firstly translocated from China to...

Temperature is a main driver of the ecology and evolution of ectotherms. In particular,the ability to move at sub-lethal low temperatures can be described through three thermal tolerance indices—critical thermal minimum (CTmin), chill coma temperature (CCT), and activity recovery (AR). Although these indices have proven relevant for...

Abstract Uncertainty about the taxonomic status and the specificity of a species commonly prevent its consideration as a candidate for biological control of pest organisms. Here we use a combination of molecular analysis and crossing experiments to gather evidence that the parasitoid wasp Ganaspis brasiliensis , a candidate for biological...

Context : Considered as one of the most important pest of Castanea species worldwide, the chestnut gall wasp Dryocosmus kuriphilus (Hymenoptera,Cynipidae) can induced fruit production losses from 60 to 80% (EFSA, 2010). Reported for the first time in Europe in 2002 in Italy (Brussino et al., 2002), this pest was detected in France in 2007 and...

Armored scales (Hemiptera: Diaspididae) are important pests in citrus orchards worldwide. Augmentative releases of Aphelinidae wasps (Hymenoptera) have been performed in Corsica, France to control the California Red Scale (Aonidiella aurantii (Maskell, 1879)) and the arrowhead scale (Unaspis yanonensis (Kuwana, 1923)), but biological control of...

We report here for the first time the presence of Ophelimus mediterraneus sp. n. in Mediterranean Europe. This species appears to be closely related to Ophelimus maskelli, a well-known invasive pest of Eucalyptus. Based on molecular (cytochrome oxidase I, 28S), morphological (multivariate ratio analysis) and bio-ecological investigations, our...

The olive fruit fly, Bactrocera oleae (Dipt., Tephritidae), is the most important pest of olive crops in the world. Economic losses associated to the limited efficiency of pesticides and natural regulation require the development of new alternatives. A classical biological control program was thus implemented in 2007 in France with two main...

BRC4Env is a network of Biological Resource Centres and collections, one of the 5 specialized pillars of the French research infrastructure AgroBRC-RARe. BRC4Env aims at providing a strategic delivery of agro-environmental bioresources for fundamental and applied research in environmental and agricultural sciences. These biological and/or...

Le réseau de Centres de Ressources Biologiques BRC4Env (https://www.brc4env.fr/), collecte, caractérise, conserve et distribue des ressources biologiques (matériel biologique et données associées) agro-environnementales. Ces ressources sont ouvertes à la recherche fondamentale et appliquée mobilisant des ressources prélevées dans...

Le réseau de Centres de Ressources Biologiques BRC4Env (https://www.brc4env.fr/), collecte, caractérise, conserve et distribue des ressources biologiques (matériel biologique et données associées) agro-environnementales. Ces ressources sont ouvertes à la recherche fondamentale et appliquée mobilisant des ressources pour caractériser...

Pseudococcus comstocki (Hemiptera: Pseudococcidae) is a mealybug species native to Eastern Asia and present as an invasive pest in northern Italy and southern France since the start of the century. It infests apple and pear trees, grapevines and some ornamental trees. Biocontrol programmes against this pest proved successful in central Asia and...