Search results for "InSe"
showing 10 items of 3069 documents
Un mystère : la technique de conservation mise en oeuvre par Honoré Fragonard pour créer ses fameux écorchés
2008
A two part overview of the techniques used by Honoré Fragonard to create and preserve (mainly against the insects) cutaway anatomical figures (" écorchés ") of animals or humans. The first part summarise the techniques preparing the dry anatomical specimens at that time, according to contemporary bibliographical data: selection and preparation of the bodies, then injection of the various organs and tissues (e.g: muscles, nerves, lymph and blood vessels, placenta etc.). The second one gives detailed information on the techniques used by Fragonard to create his " écorchés " : selection of the subjects, highlighting the various organs and tissues, mummification, drying and varnishing. This new…
Effet insecticide de Bacillus thuringiensis kurstaki et d’une toxine bactérienne, le Spinosad, à l’égard des blattes domestiques adultes (Blattella g…
2012
Les blattes sont très étudiées en raison de leur impact sur la santé humaine et animale, sur les cultures et l’habitat. Blattella germanica est une blatte domestique prédominante qui représente un vecteur potentiel des maladies. En raison de sa nuisance elle a fait l’objet de plusieurs études, en vue d’une lutte efficace. Ces dernières années, une nouvelle approche toxicologique est apparue, elle consiste à développer de nouveaux insecticides issus essentiellement des molécules biologiques telles que les plantes et les microorganismes comme les champignons et les bactéries. Dans cette étude on s’est intéressé aux effets induits par le Bacillus thuringiensiskurstaki sur les adultes de B. ger…
Pesticides sur blé tendre d'hiver, diversité dans le détail
2013
Contexte -L’analyse des pratiques d’application des pesticides (herbicides, fongicides, insecticides, ré-gulateurs) sur le blé tendre d’hiver (BTH) a été réalisée à partir de données d’en-quêtes annuelles sur une petite zone agricole en Côte-d’Or. Etude - L’étude a porté sur 294 parcelles appar-tenant à 13 exploitants pour la période 2004-2011. L’indice retenu pour carac-tériser l’usage des pesti-cides est l’IFT (indice de fréquence de traitements).
La pollinisation du cassis : État des lieux dans un contexte de changements anthropiques.
2019
Cultivated plants are part of their agroecosystem. Recent anthropic changes modified and decreased the wildcompartment of agroecosystems leading to a lowering of ecosystemic services such as pollination. Blackcurrant ispollinated at least partially by insects. In a study on 8 sites in Côte-d’Or, Burgundy, France we showed that pollinatordensity is lower than 0.5 pollinators per minute of observation in blackcurrant orchards. Blackcurrant are preferentiallyvisited by Bombus sp. and to a lesser extent by Andrena and Apis sp. Comparison of pollinator abundance between2018 data and data from ancient publications show that even if the floral abortion rate did not vary significantly, thenumber of…
Search for biological signature of the degradation of chlordecone in soil of the French West Indies
2015
The use of chlordecone (CLD) to eradicate the weevil populations in the banana plantations in the French West Indies (Guadeloupe and Martinique) between 1972 and 1993 led to the contamination of the soil and the environment. This very hydrophobic organochlorine insecticide persists in the soil where it slowly transfers not only to the water resources but also to terrestrial and aquatic biota (plants, animals, fishes, shellfishes). Deemed “non-degradable”, CLD is resistant to photolysis, hydrolysis and biodegradation. To date, there is no method to remediate the 20,000 hectares of polluted soil with this insecticide. Given the extent of CLD pollution, biological decontamination processes app…
Evolutionary ecology of the trans-generational immune priming in an insect
2012
Trans-generational immune priming (TGIP) is defined as the plastic enhancement of offspring's immunocompetence following an immune challenge of the females of the parental generation. In vertebrates, this phenomenon is well described, and is achieved by the maternal transfer of antibodies. In invertebrates however, it has only recently been described. Since invertebrates do not possess antibodies, the mechanism of this transmission remains unknown. If the offspring is exposed to the maternal infection, an elevated immunocompetence can help it cope better with it. Nonetheless, apart from this benefit, several cues indicate that the TGIP bears some fitness costs for individuals. The evolution…
How to explain the introduction of common ragweed into Europe during the XIXth century?
2012
EA EcolDur (équipe CAPA) CT3; Various reasons can explain the success of A. artemisiifolia in France and in Europe :* introduction of plants from various sources (in space and time)* strong variability (morphology, size, etc.) * ecological plasticityDifferent situations across areas and countriesThe dominant habitats and the spread vector can differPotentially strong effects of the landscape (soil use)
Connaissances nécessaires à la gestion du risque "écorces sensibles au nématode du pin"
2018
Connaissances nécessaires à la gestion du risque "écorces sensibles au nématode du pin"