A5109614147- Insect-Plant Interactions and Control
- Insect and Pesticide Research
- Plant and animal studies
- Insect Pest Control Strategies
- Insect behavior and control techniques
- Plant Parasitism and Resistance
- Insect symbiosis and bacterial influences
- Forest Insect Ecology and Management
- Insect and Arachnid Ecology and Behavior
- Insect Resistance and Genetics
- Plant biochemistry and biosynthesis
- Animal Behavior and Reproduction
- Statistical Methods and Inference
- Agronomic Practices and Intercropping Systems
- Plant Disease Resistance and Genetics
- Evolutionary Game Theory and Cooperation
- Horticultural and Viticultural Research
- Agriculture, Plant Science, Crop Management
- Genetic Syndromes and Imprinting
- Statistical Methods and Applications
- Agricultural Science and Fertilization
- Reproductive Health and Technologies
- LGBTQ Health, Identity, and Policy
- Ecology and Vegetation Dynamics Studies
- Nitrogen and Sulfur Effects on Brassica
Université de Rennes
2012-2025
Institut de Génétique, Environnement et Protection des Plantes
2015-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2025
L'Institut Agro
2023-2024
Institut Agro Rennes-Angers
2011-2020
Université Européenne de Bretagne
2013-2016
University of Nottingham
2005
Agricultural Research Service
1997-1998
Significance Decades of research have fostered the now-prevalent assumption that noncrop habitat facilitates better pest suppression by providing shelter and food resources to predators parasitoids crop pests. Based on our analysis largest pest-control database its kind, surrounding farm fields does affect multiple dimensions control, but actual responses pests enemies are highly variable across geographies cropping systems. Because often not enhance biological more information about local...
Abstract For many phytophagous insects, oviposition plays a key role in the selection of an appropriate host. A more comprehensive understanding factors influencing this behaviour pest insects provides basis for development new management strategies. Herein, determinants were assessed cabbage stem flea beetle, Psylliodes chrysocephala (Coleoptera: Chrysomelidae), insect specialized on Brassicaceae family and major oilseed rape crops Europe. To end, controlled condition experiment was...
The influence of extrafloral nectar, sucrose, or whitefly honeydew on host- and food-searching behavior Microplitis croceipes (Cresson) females was investigated. Retention time, parasitization rate, time allocation to host damaged leaves interval between subsequent attacks were compared in different cotton, Gossypium hirsutum L., patch treatments containing Heliocoverpa zea (Boddie) hosts. Parasitoids that starved for 2 d before release patches with either sucrose nectar showed longer...
The majority of studies exploring interactions between above- and below-ground biota have been focused on the effects root-associated organisms foliar herbivorous insects. This study examined herbivory by Pieris brassicae L. (Lepidoptera: Pieridae) performance root herbivore Delia radicum (Diptera: Anthomyiidae) its parasitoid Trybliographa rapae (Westwood) (Hymenoptera: Figitidae), mediated through a shared host plant Brassica nigra (Brassicaceae). In presence herbivory, survival D. T....
The optimal residence time of a forager exploiting resource patch in the absence competitors has been much studied since development marginal value theorem. However, several foragers are frequently observed same simultaneously, and surprisingly little such competitive situations. few theoretical models developed on this topic predict that should engage war attrition stay longer than when foraging alone. We tested prediction Pachycrepoideus vindemmiae (Hymenoptera: Pteromalidae), solitary...
All animals are infected by microbial partners that can be passengers or residents and influence many biological traits of their hosts. Even if important factors structure the composition abundance communities within among host individuals have been recently described, such as diet, developmental stage phylogeny, few studies conducted cross-taxonomic comparisons, especially on species related trophic relationships. Here, we describe compare associated with cabbage root fly Delia radicum its...
Kin selection theory predicts altruism between related individuals, which requires the ability to recognize kin from non-kin. In insects, discrimination associated with altruistic behaviour is well-known in clonal and social species but very few solitary insects. Here, we report that larvae of a non-social insect Aleochara bilineata Gyll. (Coleoptera; Staphylinidae) show sibling-directed behaviour. Larvae superparasitize more frequently hosts parasitized by non-kin individuals than those...
Abstract Intraspecific competition for resources is common in animals and may lead to physical contests. Contest outcomes aggressiveness can be influenced by the resource holding potential of contestants but also their perception value (RV). Competitors assess quality directly (real RV) estimate it according physiological status experience habitat (subjective RV). In this article, we studied contests between females solitary parasitoid Pachycrepoideus vindemmiae Rondani (Hymenoptera:...
Plants are attacked by both above- and belowground herbivores. Toxic secondary compounds part of the chemical defense arsenal plants against a range antagonists, subject to genetic variation. also produce primary metabolites (amino acids, nutrients, sugars) that function as essential for growth survival. Wild cabbage populations growing on Dorset coast UK exhibit genetically different profiles, even though they located within few kilometers each other. As in other Brassicaceae, defensive...
Abstract Selectivity is an important factor in identifying candidate pesticides to be used crop protection since it characterizes chemicals that, while being effective against target pests, exert acceptable impact on the other components of environment. Extrapolated integrated pest management (IPM) context, selectivity implies that may preserve ability beneficial insects significantly control populations. In present study, we assess physiological organophosphate chlorfenvinphos, protect...
Abstract Volatiles resulting from plant–herbivore interactions play an important role in the behavioral decisions of phytophagous, predatory, and parasitoid insects could be used for managing pest insects. However, to date after about 40 years research, documented studies on applications field remain extremely scarce. Delia radicum L. (Diptera: Anthomyiidae), cabbage root fly, is a major brassicaceous crops which classical control strategies are currently lacking. Our previous showed that...
Abstract Optimal Foraging Theory predicts that parasitoid females should optimize their host selection to maximize lifetime fitness gain and parasitize the most profitable hosts. In particular, in solitary parasitoids, avoid superparasitism, at least when sufficient unparasitized hosts are available. However, scarce, they prefer, among already parasitized hosts, those provide best survival probability progeny, which depends on age developmental stage of first parasitoid. To test this...
Development of accurate pest monitoring systems is essential for the establishment integrated management strategies. Information about behavior during colonization process, as well sex and reproductive status colonizing population often are lacking hinder their development. The cabbage stem flea beetle (CSFB, Psylliodes chrysocephala) can cause complete destruction oilseed rape crops (OSR, Brassica napus). In present study, process OSR fields by CSFB was studied.
In solitary parasitoid species, superparasitism incurs a high cost because only one individual can emerge per host. While avoiding already-parasitized hosts seems advantageous, it requires an ability to discriminate between parasitized and unparasitized hosts. The be based on physical or chemical cues signal associated either internally externally with given type of stimuli used recognize generally depends the features these but also costs benefits reusing them. Some local factors such as...