Denis Bourguet's research while affiliated with L'institut Agro | Montpellier SupAgro and other places

Publications (192)

Presentation
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PCI Ecotoxicology and Environmental Chemistry ? PCI Ecotoxicology and Environmental Chemistry is a community of recommenders, playing the role of associate editors, who recommend unpublished articles based on peer reviews to make them complete, reliable and citable articles, without the need for publication in ‘traditional’ journals. Evaluation and...
Article
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Rapid publication seems like an obvious imperative for scientific debate in the digital era. Most, if not all, science publishers aim to shorten the process between first submission and final publication of articles. However, while minimizing editorial handling and post-acceptance processing certainly reduces the time between research being conduct...
Article
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Hyposoter didymator (Hymenoptera, Ichneumonidae) is a generalist solitary endoparasitoid of noctuid larvae. In the present work, we tested whether populations of H. didymator were divided in several genetically distinct taxa as described for many other generalist parasitoid species, and whether differences in H. didymator parasitism rates were expl...
Article
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Background: Most phytophagous insects have morphological, behavioral and physiological adaptations allowing them to specialize on one or a few plant species. Identifying the mechanisms involved in host plant specialization is crucial to understand the role of divergent selection between different environments in species diversification, and to ide...
Article
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Maize was introduced into opposite sides of Eurasia 500 years ago, in Western Europe and in Asia. This caused two host-shifts in the phytophagous genus Ostrinia, O. nubilalis (the European corn borer; ECB) and O. furnacalis (the Asian corn borer; ACB) are now major pests of maize worldwide. They originated independently from Dicot-feeding ancestors...
Article
In this study, we investigated thermotolerance, several physiological responses and damage to reproductive cells in chlorpyrifos-resistant (Rc) and -susceptible (Sm) strains of the diamondback moth, Plutella xylostella subjected to heat stress. The chlorpyrifos resistance of these strains was mediated by a modified acetylcholinesterase encoded by a...
Article
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The efficacy of disease resistance genes in plants decreases over time because of the selection of virulent pathogen genotypes. A key goal of crop protection programs is to increase the durability of the resistance conferred by these genes. The spatial and temporal deployment of plant disease resistance genes is considered to be a major factor dete...
Article
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Public confidence in genetically modified (GM) crop studies is tenuous at best in many countries, including those of the European Union in particular. A lack of information about the effects of ties between academic research and industry might stretch this confidence to the breaking point. We therefore performed an analysis on a large set of resear...
Data
List of the 672 articles with outcomes classified as favorable, neutral or unfavorable, topics categorized as efficacy or durability and with affiliation and funding COI characteristics. (XLSX)
Article
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The overall interest in environmentally safe pest control methods and the rise of insecticide resistance in pest populations have prompted medical and agricultural entomology research on insect repellents in recent years. However, conducting research on repellent is challenging for several reasons: (1) the different repellent phenomena are not well...
Article
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Les liens entre agriculture et biodiversité posent des questions éthiques à la recherche agronomique. Utilitariste, cette recherche qualifie certaines espèces de nuisibles ou d’utiles et les modifie pour les besoins de l’homme. Pouvons-nous nous autoriser à transformer, contrôler ou éradiquer les espèces qui nous entourent ? Les prouesses technolog...
Chapter
A fair evaluation of the net benefits provided by pesticides is essential to feed the current debate on their benefits and adverse consequences. Pesticides provide many benefits by killing agricultural and human pests. However, they also entail several types of costs, including internal costs due to the purchase and application of pesticides, and v...
Article
A fair evaluation of the net benefits provided by pesticides is essential to feed the current debate on their benefits and adverse consequences. Pesticides provide many benefits by killing agricultural and human pests. However, they also entail several types of costs, including internal costs due to the purchase and application of pesticides, and v...
Article
The efficacy of disease resistance genes in plants decreases over time because of the selection of virulent pathogen genotypes. A key goal of crop protection programs is to increase the durability of the resistance conferred by these genes. The spatial and temporal deployment of plant disease resistance genes is considered to be a major factor dete...
Article
Article de Stéphane Foucart. Denis Bourguet, Thomas Guillemaud, Marion Desquilbet ne sont pas auteurs mais sont interviewés.
Article
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Host specialisation plays a key role in the extreme diversification of phytophagous insects. While proximate mechanisms of specialisation have been studied extensively, their consequences for species divergence remain unclear. Preference for, and performance on hosts are thought to be a major source of divergence in phytophagous insects. We assesse...
Article
Alleles conferring a higher adaptive value in one environment may have a detrimental impact on fitness in another environment. Alleles conferring resistance to pesticides and drugs provide textbook examples of this trade-off as, in addition to conferring resistance to these molecules, they frequently decrease fitness in pesticide/drug-free environm...
Article
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Asian corn borer, Ostrinia furnacalis (Guenée), is a severe pest that infests cultivated maize in the major production regions of China. Populations show genotype-by-environment variation in voltinism, such that populations with a single generation (univoltine) are fixed in Northern China where growing seasons are short. Low genetic differentiation...
Article
New agricultural pest species attacking introduced crops may evolve from pre-existing local herbivores by ecological speciation, thereby becoming a species by becoming a pest. We compare the evolutionary pathways by which two maize pests (the Asian and the European corn borers, ACB and ECB) in the genus Ostrinia (Lepidoptera, Crambidae) probably di...
Article
The wasp Hyposoter didymator (Hymenoptera, Ichneumonidae) parasitizes several agricultural pest moths and could therefore be used in biological control. The 454 FLX Titanium pyrosequencing technology was used to define two distinct sets of multiplex combining 14 polymorphic microsatellite loci: 10 (referred to as HD) located within the genome of H....
Article
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Pyrethroid insecticides induce an excito-repellent effect that reduces contact between humans and mosquitoes. Insecticide use is expected to lower the risk of pathogen transmission, particularly when impregnated on long-lasting treated bednets. When applied at low doses, pyrethroids have a toxic effect, however the development of pyrethroid resista...
Data
The wasp Hyposoter didymator (Hymenoptera, Ichneumonidae) parasitizes several agricultural pest moths and could therefore be used in biological control. The 454 FLX Titanium pyrosequencing technology was used to define two distinct sets of multiplex combining 14 polymorphic microsatellite loci: 10 (referred to as HD) located within the genome of H....
Article
We report the quantitative trait loci (QTL) mapping of reproductive isolation traits between Ostrinia nubilalis (the European corn borer) and its sibling species O. scapulalis (the Adzuki bean borer), focusing on two traits: mating isolation (mi) and pheromone production (Pher). Four genetic maps were generated from two backcross families, with two...
Data
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Alternative scenarios for the evolution of adaptation or preadaptation to maize in the ECB and ACB, starting from an ancestral species common to the ACB, ECB and ABB. (PDF)
Article
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The genus Ostrinia includes two allopatric maize pests across Eurasia, namely the European corn borer (ECB, O. nubilalis) and the Asian corn borer (ACB, O. furnacalis). A third species, the Adzuki bean borer (ABB, O. scapulalis), occurs in sympatry with both the ECB and the ACB. The ABB mostly feeds on native dicots, which probably correspond to th...
Data
Estimated clustering from structure analyses for K = 2 to K = 7. Each individual is represented by a vertical line, divided into up to K coloured segments representing the individual's estimated fraction of membership of each of the K clusters. Vertical black lines separate samples from different localities and host-plants, as labelled at the botto...
Data
Number of outlier markers detected using methods alternative to BayeScan. (DOC)
Data
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Species distribution of BLASTs versus NR. The most represented species resulting from blastx analyzes versus NR (e-value cutoff = 1e-5) are shown for both de novo transcriptomes.
Data
GO term distribution. Standard configuration of the Blast2GO web application (http://www.blast2go.com) was applied to generate level 3 graphs for GO-term distributions to the categories molecular function (Figure S6A), biological process (Figure S6B), and cellular component (Figure S6C). No significant differences were observed between the Ostrinia...
Data
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Homopolymer length distributions in O. nubilalis reads. The distributions of the longest homopolymer in the O. nubilalis reads are given. For each transcript the longest homopolymer had to be composed of at least two successive identic nucleotides. The X axis lists the homopolymer length and the Y axis shows the counts of transcripts with homopolym...
Data
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Homopolymer length distributions in O. scapulalis transcripts. The distributions of the longest homopolymer in the O. scapulalis transcripts are given. For each transcript the longest homopolymer had to be composed of at least two successive identic nucleotides. The X axis lists the hompolymer length and the Y axis shows the counts of transcripts w...
Data
Ortholog Hit Ratios (OHR) for best hits in NR. Table S2 Recovery level of NR Ostrinia ESTs. Table S3 Recovery level of a reference and public dataset of O. nubilalis contigs. Table S4 Distribution of Ortholog Hit Ratios (OHR) of similar transcripts. Table S5 Distribution of Ortholog Hit Ratios (OHR) of PDEGs. Table S6 Blast2GO Fisher enrichment tes...
Data
Full-text available
Homopolymer length distributions in O. scapulalis reads. The distributions of the longest homopolymer in the O. scapulalis reads are given. For each transcript the longest homopolymer had to be composed of at least two successive identic nucleotides. The X axis lists the homopolymer length and the Y axis shows the counts of transcripts with homopol...
Article
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Background This study aimed at enhancing the transcriptomic resources for two sibling species of moths, Ostrinia scapulalis (Adzuki bean borer) and Ostrinia nubilalis (European corn borer), as a foundation for future researches on their divergence history. Previous works on these species had shown that their genetic divergence was low, while they w...
Data
Full-text available
Homopolymer length distributions in O. nubilalis transcripts. The distributions of the longest homopolymer in the O. nubilalis transcripts are given. For each transcript the longest homopolymer had to be composed of at least two successive identic nucleotides. The X axis lists the homopolymer length and the Y axis shows the counts of transcripts wi...
Article
Abstract Wolbachia are maternally inherited endosymbiotic bacteria infecting a wide range of arthropods and filarial nematodes.They can induce various reproduction alterations in their hosts, including thelytokous parthenogenesis, cytoplasmic incompatibility (CI), feminization of genetic males and male killing. Here we investigated diversity and pr...
Article
The evolution of resistance to pesticides and drugs by pests and pathogens is a textbook example of adaptation to environmental changes and a major issue in both public health and agronomy. Surprisingly, there is little consensus on how to combine selection pressures (i.e., molecules used in the treatment of pests or pathogens) over space and time...
Article
Specifying species boundaries is often tricky, because advanced biomolecular analyses can reveal that morphologically similar individuals in fact belong to distinct species. This is frequently the case when populations previously considered as a single polyphagous taxon prove to consist of several genetically distinct taxa using different resources...
Article
This article documents the addition of 473 microsatellite marker loci and 71 pairs of single-nucleotide polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database. Loci were developed for the following species: Barteria fistulosa, Bombus morio, Galaxias platei, Hematodinium perezi, Macrocentrus cingulum Brischke (a.k.a. M. ab...
Data
Parasitism rates (in %) of the three main tachinid species infesting O. nubilalis and O. scapulalis. Parasitism rates of Actia pilipennis, Eumea mitis, Nemorilla maculosa, Voria ruralis and Zenillia mitis were negligible and are therefore not given. References: A = Thompson & Parker (1928), B = Paillot (1928), C = Parker et al. (1929), D = Pélissié...
Data
Parasitism rates (in %) of the hymenopteran Ichneumonidae infesting O. nubilalis and O. scapulalis. Parasitism rates of Campoplex lugubrinus, Campoplex rothi, Exeristes roborator, Pristomerus vulnerator and Theronia atalantae were negligible and are therefore not given. References: A = Thompson & Parker (1928), B = Paillot (1928), C = Parker et al....
Article
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Understanding the ways in which human environmental modifications affect biodiversity is a key challenge in conservation planning, pest control and evolutionary ecology. Parasitoid communities, particularly those associated with agricultural pests, may be susceptible to such modifications. We document here changes in the larval parasitoid communiti...
Data
Parasitism rates (in %) of the hymenopteran Braconidae infesting O. nubilalis and O. scapulalis. Parasitism rates of Eulophidae were negligible, and thus not given. References: A = Thompson & Parker (1928), B = Paillot (1928), C = Parker et al. (1929), D = Pélissié et al. (2010), E = this study. Sd = standard deviation. * Not given but probably sev...
Data
Taxonomic synonymies between the studies performed during the 1920's and the 2000's. (DOC)
Data
Results of GLM analyses testing the “region groups”, “year” and the interaction “region groups x year” effects on mean species richness (SR) per region, mean parasitism rate (PR) per site, Shannon and Weaver diversity Index (H′) per region and % infested sites. Values of Fisher (F) and Chi-square (χ2) are given for the gaussian and binomial/binomia...
Data
Parasitism rates (%) overall parasitoids and for each tachinid species infesting O. nubilalis collected on maize from 2001 to 2005. (DOC)
Data
Parasitism rates (%) of the hymenopteran species infesting O. nubilalis collected on maize from 2001 to 2005. (DOC)
Data
Results of GLM analyses testing the “region”, “year” and the interaction “region x year” effects on mean parasitism rate (PR) per site and on % of infested sites. Values of Fisher (F) and Chi-square (χ2) are given for the gaussian and binomial models, respectively. df = degree of fredoom. (DOC)
Data
Parasitism rates (in %) overall tachinids, overall hymenopteran and overall parasitoids infesting O. nubilalis and O. scapulalis. References: A = Thompson & Parker (1928), B = Paillot (1928), C = Parker et al. (1929), D = Pélissié et al. (2010), E = this study. Sd = standard deviation. * Not given but probably several thousands, ** Not given but pr...
Article
Full-text available
Trilobed uncus taxa of the genus Ostrinia (Lepidoptera, Crambidae) illustrate the complex relationship, at early stages of speciation, between reproductive isolation and differentiation in morphology, resource use and genetic variation. On the basis of behaviour and ecology, we recently hypothesized that individuals with small mid-tibiae belong to...
Book
Pisseuse, tsé-tsé, de l'olive, des pluies ou tout simplement domestique, les mouches agacent, nuisent et parfois effrayent. Bien des raisons justifient ce désamour. Ces insectes déposent en effet des bactéries sur les aliments et des excréments sur nos murs, transmettent des maladies et ravagent nos cultures. Leur image est associée à la dégradatio...
Article
The large-scale cultivation of transgenic crops producing Bacillus thuringiensis (Bt) toxins have already lead to the evolution of Bt resistance in some pest populations targeted by these crops. We used the F2 screening method for further estimating the frequency of resistance alleles of the European corn borer, Ostrinia nubilalis (Hübner) (Lepidop...
Article
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Divergent adaptation to host plant species may be the major mechanism driving speciation and adaptive radiations in phytophagous insects. Host plants can differ intrinsically in a number of attributes, but the role of natural enemies in host plant specialization is often underappreciated. Here, we report behavioural divergence between the European...
Article
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Resistance to pesticides and drugs led to the development of theoretical models aimed at identifying the main factors of resistance evolution and predicting the efficiency of resistance management strategies. We investigated the various ways in which the evolution of resistance has been modelled over the last three decades, by reviewing 187 article...
Article
We examined whether maize offers enemy-free space (EFS) to its pest Ostrinia nubilalis, and may thereby have contributed to its divergence from the sibling species, Ostrinia scapulalis, feeding mainly on mugwort, when introduced into Europe five centuries ago. We collected Ostrinia larvae on maize (70 populations, 8425 individuals) and mugwort (10...
Article
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We constructed a reaction-diffusion model of the development of resistance to transgenic insecticidal Bt crops in pest populations. Kostitzin's demo-genetic model describes local interactions between three competing pest genotypes with alleles conferring resistance or susceptibility to transgenic plants, the spatial spread of insects being modelled...