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Registros recuperados: 13
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Adaptation des apports alimentaires aux variations journalières des besoins en calcium et phosphore de la poule Inra
Sauveur, B..
Si on offre à une poule pondeuse une source de calcium alimentaire qu’elle puisse identifier (alimentation calcique séparée), elle consomme ce calcium de façon discontinue en relation avec la formation de la coquille de l’oeuf. Cette pratique réduit la mobilisation osseuse et accroît la solidité de la coquille dans la moitié des cas environ. L’effet est particulièrement net lorsque la température ambiante est élevée. Ceci permet également de réduire l’apport alimentaire de phosphore.Plus généralement, la quantité de coquille déposée sur l’oeuf apparaît comme inversement liée à la teneur en phosphore du plasma, à la fois à long terme et de façon instantanée. Il convient donc de limiter la teneur en phosphore assimilable de l’aliment à 0,28 % pour une...
Tipo: Journal Article Palavras-chave: POULE PONDEUSE; COQUILLE; OVIPOSITION.
Ano: 1992 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9300009608034845&uri=/notices/prodinra1/2008/03/
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Biological evidence of an oviposition-deterring pheromone in Lobesia botrana Den. et Schiff. (Lepidoptera, Tortricidae) Inra
Gabel, B.; Thiery, D..
Females of the European grapevine moth (Lobesia botrana Den. et Schiff.) usually deposit isolated eggs on flowers and berries of the grapevine (Vitis vinifera L.). We have investigated whether an epideictic pheromone could be present on the egg surface to explain this spacing behavior. About 21,000 eggs ofL. botrana were washed in cold methanol, and the biological activity was tested in a two-choice bioassay offering treated and nontreated areas. Different dilutions of the extract were tested in methanol, which was inactive alone. At the dose of four egg equivalents per microliter of extract, the number of eggs laid by theL. botrana females was reduced by as much as 57% on the treated areas compared to nontreated areas. A longer-term suppression of...
Tipo: Journal Article Palavras-chave: LOBESIA BOTRANA; LEPIDOPTERA; TORTRICIDAE; OVIPOSITION; PHEROMONE DE PONTE; COMPORTEMENT DE PONTE PHEROMONE; OVIPOSITION-DETERRING PHEROMONE; OVIPOSITION; LOBESIA BOTRANA; LEPIDOPTERA; TORTRICIDAE.
Ano: 1992 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB920002500300028660&uri=/notices/prodinra1/2010/11/
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Consommation alimentaire chez des poules Fayoumi et Fayoumi X Leghorn en fonction de la formation de l'oeuf et de l'oviposition, avec ou sans source calcique separee Inra
Abd-El-Latif, M.; Bordas, A.; Merat, P..
Des poules Fayoumi et FI (Fayoumi x Leghorn) ont été comparées pour leurs performances de ponte, les caractéristiques de leurs œufs et pour leur consommation alimentaire en fonction de la formation d’un œuf et de l’oviposition, par des mesures journalières pendant 3 semaines, d’abord en présence d’un aliment complet, puis avec distribution séparée d’un aliment de base non enrichi en calcium et de coquilles d’huîtres. L’excès de consommation d’aliment unique (période 1) associé à la formation d’un œuf ou à l’oviposition, n’est pas différent pour les 2 types génétiques lorsqu’il est exprimé en p. 100 de la consommation journalière moyenne de la période. Dans la seconde période, la consommation de l’aliment de base n’est pas affectée par le type de...
Tipo: Journal Article Palavras-chave: CONSOMMATION ALIMENTAIRE; OEUF; OVIPOSITION; RACE FAYOUMI; FORMATION DE L'OEUF; ALIMENTATION CALCIQUE.
Ano: 1986 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9000002023015350&uri=/notices/prodinra1/2008/01/
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Differences in life history strategies between an invasive and a competing resident seed predator Inra
Boivin, T.; Rouault, G.; Chalon, A.; Candau, J.N..
Competitive interactions may arise from biological invasion if a successful invasive species requires the ecological niche of a resident one. Life-history traits that make a species a successful invader are of particular interest in elucidating both invasion success and how interspecific competition may emerge. In southeastern France, the invasion of cedar forests by the seed chalcid Megastigmus schimitscheki generated competitive relationships with the resident M. pinsapinis for the exploitation of the seed resource. Among the numerous ecological traits allowing these seed predators to exploit their niche successfully, the timing of adult emergence, initial egg load and age-specific realized fecundities of females were investigated to help understanding...
Tipo: Journal Article Palavras-chave: INVASION BIOLOGIQUE; INSECTE DEPREDATEUR DES SEMENCES INITIAL EGG LOAD; BIOLOGICAL INVASION; OVIPOSITION; SEED INSECT.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008209c0f12&uri=/notices/prodinra1/2010/11/
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Effects of a biocontrol agent of apple powdery mildew (Podosphaera leucotricha) on the host plant and on non-target organisms: an insect pest (Cydia pomonella) and a pathogen (Venturia inaequalis) Inra
Alaphilippe, A.; Elad, Y.; Rav David, D.; Derridj, S.; Gessler, C..
A number of studies have focused on the selection and use of new biocontrol agents, but the effects of the introduction of these microorganisms on non-target organisms, including the crop plants themselves, are not well known. Non-target effects of sprayed applications of a potential biocontrol agent of apple powdery mildew (Podosphaera leucotricha Ell. Et Ev.), on scab infections (Venturia inaequalis Cooke Winter), on codling moth [Cydia pomonella L. (Lepidoptera: Tortricidae)] oviposition and damage and apple (Malus x domestica) fruit quality are examined. This biocontrol agent, an epiphytic yeast isolate called Y16, affected neither conidia germination of V. inaequalis nor their penetration of the leaf tissue but suppressed the disease caused by this...
Tipo: Journal Article Palavras-chave: AGENT PATHOGENE; PLANTE HOTE; MALUS; CHAMPIGNON; INSECTE NUISIBLE; MILDIOU; GERMINATION; CHAMPIGNON; ERYSIPHALES; ASCOMYCOTINA; DOTHIDEALES; LEPIDOPTERA; INSECTE CONIDIA GERMINATION; APPLE SCAB; CODLING MOTH; OVIPOSITION; FRUIT QUALITY.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010c26ddd99&uri=/notices/prodinra1/2010/09/
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Egg dispersion in codling moth : influence of egg extract and of its fatty acid constituents Inra
Thiéry, D.; Gabel, B.; Farkas, P.; Jarry, M..
Codling moth females (Cydia pomonella, Lepidoptera: Tortricidae) (CM) usually lay single eggs and have a tendency to disperse. In a first experiment we observed that single females exposed to 20 apples distribute their eggs regularly among apples, suggesting a dispersive oviposition behavior. In a dual-choice situation, isolated females avoided oviposition on areas of cardboard treated with a methylene dichloride egg extract at the dose of ca. 1.0 egg equivalent/cm². A strong avoidance was obtained in response to a 20-fold dose, which was accompanied by a significant reduction of total oviposition. Seven major compounds found by GC analyses in the methylene dichloride extract of 2 to 3-day-old eggs were saturated or unsaturated C14-C18 straight-chain fatty...
Tipo: Journal Article Palavras-chave: LEPIDOPTERE; CYDIA POMONELLA; OEUF; OVIPOSITION; COMPOSITION CHIMIQUE BEHAVIOR; CYDIA POMONELLA; OVIPOSITION; PHEROMONE; SYNOMONE; INSECT; OFFSPRING DISPERSION; FATTY ACIDS; EGG AGE; LEPIDOPTERA; TORTRICIDAE.
Ano: 1995 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9600002471059162&uri=/notices/prodinra1/2010/11/
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Epicuticular factors involved in host recognition for the aphid parasitoid Aphidius rhopalosiphi Inra
Muratori, F.; Le Ralec, A.; Lognay, G.; Hance, T..
In insect parasitoids, fitness is dependent on the host finding and recognition abilities of the female. Host recognition cues have been described for various host-parasitoid systems, but are still under investigation in aphid parasitoids. Our study aimed to clarify the respective role of physical and chemical cues in recognition of the aphid cuticle. Shed aphid exuviae were used as an elicitor in order to avoid any influence of color, movement, or volatiles present in a living aphid. We assessed the effect of chemical and heat treatments on the texture of the cuticle by using scanning electron microscopy and tested the recognition of treated cuticles by the parasitoid. We showed that recognition cues of the cuticle can be removed chemically (using...
Tipo: Journal Article Palavras-chave: PUCERON; SITOBION AVENAE; PARASITOIDE; OVIPOSITION; CUTICULE; APHIDIUS RHOPALOSIPHI.
Ano: 2006 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007da315230&uri=/notices/prodinra1/2010/11/
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Epicuticular waxes and plant primary metabolites on the surfaces of juvenile Eucalyptus globulus and E.nitens (Myrtaceae) leaves Inra
Steinbauer, M. J.; Davies, N. W.; Gaertner, C.; Derridj, S..
Our knowledge of the composition of the waxes on the surfaces of Eucalyptus leaves is growing but that of plant primary metabolites has been completely overlooked. The diffusion of primary metabolites above the cuticle exposes them to a variety of herbivorous taxa and has the potential to influence their responses to that plant. Juvenile leaves of two families of Eucalyptus globulus Labill. ssp. globulus and two families of E. nitens (Deane & Maiden) Maiden had 11 out of 16 of the epicuticular waxes that were detected in common. However, two phenylethyl esters (waxes) were only detected on leaves of one family of E. globulus and two benzyl esters (waxes) were not detected or were uncommon in samples from E. nitens. Wax compounds were generally found in...
Tipo: Journal Article Palavras-chave: INSECTE; AUTOMNE; MITE; FEUILLE; ACIDE AMINE; EUCALYPTUS; METABOLISME; EUCALYPTUS GLOBULUS; METABOLISME PRIMAIRE; EUCALYPTUS NITENS; MYRTACEAE; ANALYSE STATISTIQUE; GLUCIDE; SUCRE; POLYOL; ACIDE MALIQUE; ACIDE GAMMA AMINOBUTYRIQUE AUTUMN GUM MOTH; MYCOSPHAERELLA LEAF DISEASE; AMINO-ACID COMPOSITIONS; MNESAMPELA-PRIVATA; MAYETIOLA-DESTRUCTOR; HESSIAN FLY; OVIPOSITION; INSECT; SUSCEPTIBILITY; CHEMICALS.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201053aa4348&uri=/notices/prodinra1/2010/10/
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Methodological approach to identify chemical oviposition stimulants from maize for European corn borer Inra
Stockel, J.; Bar, M.; Boidron, J.N.; Bourgeois, G..
The noncontingent distribution ofO. nubilalis Hbn. eggs on various corn varieties has allowed their classification as either "favorable" or "nonfavorable" hybrids. This classification is based on a chemical communication system using volatile compounds active at a distance from the insect or active when in contact with the insect as soluble sugar components. Under this hypothesis, gas chromatography is the best way of investigating for the chemical differences between corn silk extracts from the two types of hybrids. A first experiment, using a "desorption-trapping" system on Tenax coupled to a gas chromatograph showed a quantitative difference between two compounds from the two hybrids. A second experiment showed the advantages and disadvantages of this...
Tipo: Journal Article Palavras-chave: LEPIDOPTERE; OVIPOSITION; CHROMATOGRAPHIE EN PHASE GAZEUSE; SPECTROMETRIE DE MASSE; DEPREDATEUR; LUTTE; PYRALE DU MAIS; OSTRINIA NUBILALIS PYRALIDAE; OSTRINIA NUBILALIS; OVIPOSITION PREFERENCE; CORN SILK VOLATILE CHEMICALS; EXTRACTION; DESORPTION; GAS CHROMATOGRAPHY; MASS SPECTROMETRY ALKANES; PHENYLACETALDEHYDE.
Ano: 1987 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9400010071035296&uri=/notices/prodinra1/2010/11/
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Nouvelles recherches sur la reine des abeilles (Apis mellifica) National Institute of Agronomic Research
Lienhart, R..
Tipo: Journal Article-postprint Palavras-chave: HONEYBEE; APIS MELLIFERA; APIDAE; HYMENOPTERA; SOCIAL INSECT; QUEEN; OVIPOSITION; EGG; FEMALE; MALE; DISPATCHING; ABEILLE DOMESTIQUE; INSECTE SOCIAL; REINE; PONTE; OEUF MALE; OEUF FEMELLE; REPARTITION.
Ano: 1950 URL: http://hdl.handle.net/2174/462
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Oviposition rates and yield in Apis mellifera L. National Institute of Agronomic Research
Cale, Gladstone Hume.
Tipo: Journal Article-postprint Palavras-chave: HONEYBEE; APIS MELLIFERA; APIDAE; HYMENOPTERA; SOCIAL INSECT; OVIPOSITION; HYBRIDE; HETEROSIS; HONEY; YIELD; HIVE PRODUCT; GENETICS; ABEILLE DOMESTIQUE; INSECTE SOCIAL; OVIPOSITION; HYBRIDE; HETEROSIS; MIEL; RENDEMENT; PRODUIT DU RUCHER; GENETIQUE.
Ano: 1956 URL: http://hdl.handle.net/2174/463
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Oviposition response of Lobesia botrana females to long-chain free fatty acids and esters from its eggs Inra
Gabel, B.; Thiéry, D..
Avoidance of occupied ovisposition sites supposes that females perceive information related to their own progency. Fatty acids identified from egg extracts have been reevaluated using a different extraction method, and we have investigated the dose-dependent oviposition response of European grape vine moths (Lobesia botrana) to myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, methyl palmitate, methyl oleate, and ethyl palmitate; all except ethyl palmitate have been identified from eggs of L. botrana. A methylene dichloride extract of eggs from L. botrana revealed the presence of saturated free fatty acids (myristic, palmitic, and stearic) and unsaturated acids (palmitoleic, oleic, linoleic, and linolenic) in amounts...
Tipo: Journal Article Palavras-chave: LOBESIA; LEPIDOPTERE; MARQUEUR CHIMIQUE; OVIPOSITION; OEUF BEHAVIOR; LOBESIA BOTRANA; OVIPOSITION; INSECT; TORTRICID; LEPIDOPTERA; FATTY ACIDS.
Ano: 1996 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9600002472059163&uri=/notices/prodinra1/2010/11/
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Regulation of oviposition in social hymenoptera National Institute of Agronomic Research
Brian, M.V.; Brian, A.D..
The rate of increase of population in societies of social insects obviously depends upon the numbers of adults which can be produced per head of the adult population. Ideally, the numbers of eggs laid should be just appropriate to this situation, so that the prevailing food supply may be efficiently transformed.
Tipo: Journal Article-postprint Palavras-chave: SOCIAL INSECT; HYMENOPTERA; BOMBUS AGRORUM; MYRMICA; OVIPOSITION; SOCIAL REGULATION; FOOD; HYMENOPTERA; INSECTE SOCIAL; BOMBUS AGRORUM; MYRMICA; OVIPOSITION; REGULATION SOCIALE; NOURRITURE.
Ano: 1948 URL: http://hdl.handle.net/2174/465
Registros recuperados: 13
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