LAVOIR , Anne Violette

Résumé à la destination du public, journalistes et décideurs de l'article "Amichot M, Joly P, Martin-Laurent F, Siaussat D, Lavoir A-V. 2018. Biocontrol, new questions for Ecotoxicology? Environ Sci Pollut Res. 25(34). doi:10.1007/s11356-018-3356-5."Summary of the manuscript "Amichot M, Joly P, Martin-Laurent F, Siaussat D, Lavoir A-V. 2018....

This study examined the effects of various levels of nitrogen inputs (optimal, insufficient and excessive) and water inputs (optimal, low drought and high drought) to tomato plants (Solanum lycopersicum) on survival and development of an invasive tomato leafminer, Tuta absoluta (Meytick) (Lepidoptera: Gelechiidae). Plant growth i.e. plant...

The gypsy moth, [i]Lymantria dispa[/i]r, is known as an important agent of hardwood forest defoliation in the northern hemisphere. Field observations in Corsica showed that caterpillars did not attack three hardwood species: [i]Olea europaea[/i] (olive),[i] Fraxinus ornus[/i] (flowering ash) and [i]Ficus carica[/i] (common fig). Bioassays were...

Density- and trait-mediated indirect interactions (DMIIs and TMIIs respectively) are important drivers of community dynamics but how plant nutrients (bottom-up effects) affect the magnitude of such indirect interactions has been scarcely addressed. To assess the impact of bottom-up forces on indirect interactions, we carried out laboratory and...

Omnivorous Heteroptera predators play important roles in biological control of a wide range of pest insects. Their predation could be influenced by various biotic or abiotic factors. Here we examined the effects of nitrogen and water inputs to tomato plants (Solanum lycopersicum L.) on the predation strength of the omnivore Macrolophus pygmaeus...

Alternatives to synthetic pesticide use are required to increase the sustainability of crop protection strategies. Identifying technical options based on the biological regulation of pests (pathogens, animal pests and weeds) is a promising and complex challenge. Among the options to be developed are 'service plants', also called 'cover plants',...

Thymus longicaulis subsp. longicaulis, Th. picentinus, Th. spinulosus, and Th. zygiformis var. magellensis are chamaephytes occurring in rocky places of central and southern Italy and are poorly explored for the chemical composition and biological activity of their essential oils. In the present work, we analysed the essential oil composition...

Omnivorous arthropods make dietary choices according to the environment in which they forage, mainly availability/quality of plant and/or prey resources. Such decisions and their subsequent impacts on life-history traits may be affected by the availability of nutrients and water to plants, that is, through bottom-up forces. By setting up arenas...

Variation in resource input to plants triggers bottom-up effects on plant-insect herbivore interactions. However, variation in plant intrinsic traits in response to resource availability may modify the bottom-up effects. Furthermore, the consequences also may depend on the feeding strategy of insect herbivores belonging to different feeding...

Volatile organic compounds (VOCs) are of first importance in plant defenses since they alter host-plant location by herbivore insects. The worldwide distribution of tomato offers to explore the ecological diversity of defensive VOCs produced by plants supporting a large range of local adaptations. In this study, first, we analyzed the diversity...

The Gypsy moth, Lymantria dispar, is known as an important agent of hardwood forest defoliations in the northern hemisphere. Observations made in the field in Corsica, showed that three hardwood species were not attacked by the caterpillars: Olea europaea (Olive), Fraxinus ornus (Flowering Ash) and Ficus carica (Common fig). To highlight the...