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Academic literature on the topic 'Chênes – Maladies'
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Journal articles on the topic "Chênes – Maladies"
Boulet, Bruno, and Guy Bussières. "Regard nouveau sur la biologie du polypore ponctué : Fomitiporia punctata (P. Karsten) Murrill." Le Naturaliste canadien 142, no. 3 (August 28, 2018): 59–72. http://dx.doi.org/10.7202/1050999ar.
Full textBERGOT, Magali, Benoit MARCAIS, Victorine PERARNAUD, Marie-Laure DESPREZ-LOUSTAU, and Andre LEVY. "Géographie de l'impact du gel sur la maladie de l'encre du chêne." La Météorologie 8, no. 34 (2001): 45. http://dx.doi.org/10.4267/2042/36182.
Full textDutertre, Joël. "La tache aveugle – La santé des jeunes de quartiers." Diversité 167, no. 1 (2011): 71–75. http://dx.doi.org/10.3406/diver.2011.3497.
Full textDissertations / Theses on the topic "Chênes – Maladies"
Eichenlaub, Lisa. "Anticiper, comprendre et analyser les pathologies complexes et émergentes des chênes." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0148.
Full textEuropean oaks (Quercus robur, pedunculate oak and Q. petraea, sessile oak) are two emblematic forest species with important ecological, economical and cultural roles. These species are essential in many ecosystems and represent respectively 11 and 12% of the volume of standing wood of deciduous trees in France. However, they are subject to biotic and abiotic disturbances, which have increased in frequency and intensity due to global changes. Declines, which are multifactorial syndromes, and diseases caused by exotic or native pathogens, have strongly affected oaks since the beginning of the 20th century. The nature of these declines, as well as the interactions between biotic and abiotic factors causing them, are not fully understood. This thesis proposes to define part of their etiology through a study of the cortical and root pathobiomes. Finally, it stresses the importance of territorial surveillance as a way to prevent the introduction of exotic pathogens, especially the threat represented by quarantine organisms. Acute Oak Decline (AOD) is currently affecting oak populations in the United-Kingdom. Mediated by abiotic factors (temperature and precipitation), AOD would be triggered by insects (mainly Agrilus biguttatus) and a complex of bacterial species. This disease perfectly illustrates the pathobiome paradigm, as the complex host-pathobiome-insect interactions are essential to its development. In order to clarify the prevalence of symptoms associated with AOD in France and the role played by bacteria in the observed declines, a study of the etiology of cortical necroses associated or not with attacks of A. biguttatus on declining oaks has been observed. The first report on the presence of bacteria Brenneria goodwinii, Gibbsiella quercinecans and Rahnella victoriana in necroses has been made on Q. robur and Q. petraea in France. However, these bacteria have been isolated less frequently in the lesions than the fungi Fusarium quercinum, F. falsibabinda, Neonectria sp., N. punicea. Moreover, their pathogenicity was confirmed by the inoculations of young oak plants. This confirms the importance of the pathobiome in the symptoms associated with AOD and suggests a significant role of fungal pathogens, which was previously underestimated. The relationships between soil microbiota and chronic oak decline were analyzed in the Chantilly Forest (Oise, France) and with a comparison approach by pair of declining and non-declining oaks, an analysis of the fungal and oomycetes diversities by metabarcoding was performed. The study revealed that the compositions mainly depend on the types of soil and the health status of the trees according to the compartment sampled (bulk soil, rhizosphere or roots). 4 Finally, to help the diagnosis and the identification of phytosanitary problems on Quercus spp. in France, an interactive tool called NESTOR (phytosaNitary survEillance and diagnoSTics of Oaks in FRance), has been developed. Inventorying the main bioaggressors and abiotic problems on oaks with this tool is intended to encourage passive surveillance of the territory by the general public and professionals and also to support the active surveillance of the territory led by the Forest Health Department of the French Ministry of Agriculture and Food in France. In 2022-2023, intensified surveillance of oak wilt disease, caused by the vascular fungus Bretziella fagacearum, was carried out by collecting samples from symptomatic trees. The isolations and diagnoses conducted during this thesis confirmed that the fungus is still absent from the territory, but that it remains important to stay vigilant about its possible introduction in France
Robin, Cécile. "La maladie de l'encre du chêne rouge Quercus Rubra l. Causée par Phytophtora Cinnamomi rands : perspectives pour l'amélioration génétique de la résistance." Bordeaux 2, 1991. http://www.theses.fr/1991BOR20157.
Full textMarçais, Benoît. "Influence de facteurs de l'environnement sur le développement de l'encre du chêne rouge (Quercus rubra L. ), maladie provoquée par Phytophthora cinnamomi." Nancy 1, 1992. http://docnum.univ-lorraine.fr/public/SCD_T_1992_0217_MARCAIS.pdf.
Full textDantec, Cécile. "Caractérisation des contraintes biotiques et abiotiques sur la phénologie printanière du chêne : expliquer les patrons de diversité et prédire les changements futurs." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0042/document.
Full textBudburst phenology is a major adaptive trait of trees to the environment in temperateclimate. Our aim was to characterize the biotic (powdery mildew) and abiotic (winter and springtemperatures / spring frost) constraints acting on budburst in view to explain the patterns of intra and interpopulations’ phenological variation observed in sessile oak (Quercus petraea) along an elevation gradient.We based our approach on in situ monitoring, experimentation and modeling. Our results highlight that theavoidance of late spring frosts is a major adaptive trait along the elevation gradient. The lateness inbudburst might be due to higher requirements in forcing temperatures. Otherwise, the fungus is not locallyadapted to its host phenology so oak individuals and populations are unequally exposed to the disease.With increasing elevation, oaks are more and more exposed to the fungus, but the environmental factorsare unfavorable to higher infection. At low elevation, powdery mildew and late spring frosts favor oppositephonological phenotypes (early-flushing vs. late-flushing trees, respectively); the combination of the twopressures may thus contribute to the maintenance of the observed high phenological diversity. We alsoshowed that powdery mildew infection induced an increased polycyclism during the growing season in oakseedlings, which made them less resistant to winter frosts. Predictive phenological models will have toinclude the chilling phase which conditions dormancy breaking. Although the lack of chilling is not yet alimiting factor, the current trend in increasingly advanced budburst will certainly be slowed or even reversedin the middle of the century at low elevation, in the southern margin of the distribution area of Q. petraea
Books on the topic "Chênes – Maladies"
H, Lindquist O., Nystrom K. L, and Canadian Forest Service, eds. Insects of eastern hardwood trees. Ottawa: Canadian Forest Service, 1997.
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