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Institut de biologie
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Voici les éléments 1 - 10 sur 2372
- PublicationAccès libre
- PublicationMétadonnées seulementPlant volatile compounds shorten reaction time and enhance attraction of the codling moth (Cydia pomonella) to codlemone(2012)
;Schmera, D.BACKGROUND: The codling moth is the most serious pest of deciduous tree fruit (apples, pears, crabapples, walnuts, quince) worldwide. The high frequency of insecticide treatments per season has resulted in breakdown of codling moth control owing to insecticide resistance. As an alternative, integrated pest management includes mating disruption to achieve population suppression in orchards. Under this scheme, the sex pheromone of the codling moth, (E, E)-8,10-dodecadien-1-ol (codlemone), is released from dispensers in crops to hinder mating by luring males. Increasing the attractiveness of codlemone formulations to codling moth males can be regarded as a key to increasing the efficacy of mating disruption. With this aim, the effects of adding plant volatiles on the behavioural responses of codling moth males to codlemone were tested. RESULTS: Adding R(+)-limonene, linalool, (E)-beta-farnesene or ethyl (E, Z)-2,4-decadienoate to codlemone significantly increases the proportion of males flying to the pheromone source in a wind tunnel. The response level is equivalent to that of males responding to females releasing codlemone. Using real-time recordings, it is shown how these four plant products also shorten the response time of males to codlemone under the behavioural criteria time to activation, time till upwind flight is induced and time to pheromone source contact. CONCLUSION: Shortening the response time and increasing source location by males of dispensers releasing codlemone with R(+)-limonene, linalool, (E)-beta-farnesene or ethyl (E, Z)-2,4-decadienoate added would enhance mating disruption through better engagement ofmales with dispensers, to the detriment of females. (C) 2011 Society of Chemical Industry - PublicationMétadonnées seulement
- PublicationMétadonnées seulementThe genetic basis of resistance of Arabidopsis thaliana L. Heyhn. to Peronospora parasitica(: APS Press, 1993)
; ;Croft, K. P. C. ;Slusarenko, Alan J. ;Davis, K.R.Hammerschmidt, R. - PublicationAccès libreRépertoire et contextes sociaux des cris unitaires du colobe vert (procolobus verus) dans le Parc National de Taï (PNT), Côte d’Ivoire.
;Bene, Koffi J.-C ;Kone, InzaPour caractériser l’environnement social et écologique du Colobe Vert (Procolobus verus), des observations régulières par tranche de 15 minutes d’animaux focaux dans trois groupes ont été menées. Les observations et les enregistrements de cris occasionnels (Ad libitum) ont permis de répertorier huit (8) types de cris unitaires émis par différentes classes de sexes et d’âges. Ces cris peuvent être regroupés en quatre catégories selon les contextes sociaux dans lesquels ils interviennent : les cris a, b et c en cas de prédation et de trouble (présence de prédateur, cris d’alarme d’autres espèces), les cris f et g en situation de conflit (combat entre individus), les cris b, c et e en contexte de stabilité (calme apparent), et les cris b, c et e pour signaler des rencontres inter-groupes (rencontre avec d’autres groupes de singes)., In order to knod how Olive Colobus monkeys (Procolobus verus) interact with their social and ecological environment,we carried out regular observations by 15 minutes old section of focal animals in three groups. These observationsassociated with the recordings of occasional calls (Ad libitum) enabled us to index eight (8) types of unit calls emittedby various sex and age classes. These calls can be gathered into four types according to social contexts in whichthey happened : the calls a, b and c in context of predation and disturbance (presence of predator, alarm calls fromother monkey species), the calls f and g in a situation of conflict (fights between individual), the calls b, c and e asa signal of stability (peaceful context), and the calls b, c and e in case of intergroup encounters (encounter with othermonkey groups). - PublicationMétadonnées seulementExpression of β-1,3-glucanase and chitinase in healthy, stem rust-affected and elicitor-treated near-isogenic wheat lines showing Sr5 or Sr24-specified race-specific rust resistance(1997)
;Münch Garthoff, S.; ;Boller, T. ;Kemmerling, B.Kogel, K. H. - PublicationMétadonnées seulementHost-plant switches and the evolution of chemical defense and life history in the leaf beetle genus Oreina(1996)
;Dobler, Susanne ;Mardulyn, Patrick ;Pasteels, Jacques - PublicationMétadonnées seulementIsolation of components of the chloroplast protein import machinery(1994)
;Schnell, Danny; Blobel, GunterComponents of the protein import machinery of the chloroplast were isolated by a procedure in which the import machinery was engaged in vitro with a tagged import substrate under conditions that yielded largely chloroplast envelope-bound import intermediates. Subsequent detergent solubilization of envelope membranes showed that six envelope polypeptides copurified specifically and, apparently, stoichiometrically with the import intermediates. Four of these polypeptides are components of the outer membrane import machinery and are associated with early import intermediates. Two of these polypeptides have been characterized. One is a homolog of the heat shock protein hsp70; the other one is a channel-protein candidate.