background preloader

Oïdium du chêne (Erysiphe alphidoides)

Facebook Twitter

INSECTS 29/10/21 Relationships between the Pathogen Erysiphe alphitoides, the Phytophagous Mite Schizotetranychus garmani (Acari: Tetranychidae) and the Predatory Mite Euseius finlandicus (Acari: Phytoseiidae) in Oak. Food webs on forest trees include plant pathogens, arthropods, and their natural enemies.

INSECTS 29/10/21 Relationships between the Pathogen Erysiphe alphitoides, the Phytophagous Mite Schizotetranychus garmani (Acari: Tetranychidae) and the Predatory Mite Euseius finlandicus (Acari: Phytoseiidae) in Oak

To increase the understanding of the impact of a plant pathogen on herbivore-natural enemy interactions, we studied the powdery mildew fungus Erysiphe alphitoides, the phytophagous mite Schizotetranychus garmani, and the predatory and mycophagous mite Euseius finlandicus in pedunculate oak (Quercus robur) leaves. In June, July and August of 2016, we assessed the severity of powdery mildew, mite population density and adult female mite size in 30 trees in three forests near Belgrade, Serbia. In August, the infection severity of E. alphitoides related positively to the population density of S. garmani and negatively to the body size of S. garmani females. Throughout the vegetative season, the infection severity of E. alphitoides related positively to the population density of E. finlandicus but not to its body size. ►▼ Show Figures Figure 1 ►▼ Show Figures Figure 1. Biological Conservation Volume 253, January 2021, Rethinking the natural regeneration failure of pedunculate oak: The pathogen mildew hypothesis.

Highlights Ecologists and conservationists often overlook the impacts of alien microorganisms.

Biological Conservation Volume 253, January 2021, Rethinking the natural regeneration failure of pedunculate oak: The pathogen mildew hypothesis

An alien microfungus impedes natural regeneration dynamics of a keystone species Oak powdery mildew reduces shade tolerance and growth in seedlings and saplings. EUROPEAN JOURNAL OF PLANT PATHOLOGY 21/11/20 Trichoderma asperellum efficiently protects Quercus robur leaves against Erysiphe alphitoides. Altschul, S.

EUROPEAN JOURNAL OF PLANT PATHOLOGY 21/11/20 Trichoderma asperellum efficiently protects Quercus robur leaves against Erysiphe alphitoides

F., Gish, W., Miller, W., Myers, E. W., & Lipman, D. J. (1990). Basic Local Alignment Search Tool. JOURNAL OF PLANT PATHOLOGY 03/08/20 First report of powdery mildew caused by Erysiphe alphitoides on Aegle marmelos in India. UNIVERSITE BORDEAUX 1 03/07/09 Thèse en ligne : Interaction Chêne-oïdium : Caractérisation moléculaire et adaptation locale du parasite, résistance génétique de l’hôte.

APS - 2017 - Further support of Conspecificity of oak and mango powdery mildew and first report of Erysiphe quercicola and Erysiphe alphitoides on mango in Mainland Europe. Mycoscience Volume 59, Issue 2, March 2018, First record of Erysiphe quercicola (Ascomycota: Erysiphales) on species of Quercus subgenus Cyclobalanopsis (evergreen oaks, Fagaceae) Figures (2) JavaScript is disabled on your browser.

Mycoscience Volume 59, Issue 2, March 2018, First record of Erysiphe quercicola (Ascomycota: Erysiphales) on species of Quercus subgenus Cyclobalanopsis (evergreen oaks, Fagaceae)

Please enable JavaScript to use all the features on this page. Highlights. APS - JANV 2011 - First Report of Erysiphe quercicola Causing Powdery Mildew on Ubame Oak in Korea. APS - FEV 2017 - First Report of Powdery Mildew Caused by Erysiphe alphitoides on Euonymus japonica in Korea. Mycological Progress February 2017, Volume 16, Issue 2, First records of the powdery mildews Erysiphe platani and E. alphitoides on Ailanthus altissima reveal host jumps independent of host phylogeny. FOREST PATHOLOGY 04/09/17 Erysiphe alphitoides causes powdery mildew on Eucalyptus gunnii. Mycoscience. 2006, 47(6), p. 367-373. Identity of a powdery mildew fungus occurring on Paeonia and its relationship with Erysiphe hypophylla on oak. MAAF 02/05/17 Les variations interannuelles de sévérité de l'oïdium du chêne peuvent-elles s'expliquer par un effet du climat de l'hiver sur Erysiphe quercicola ? Marie-Laure Desprez-Loustau, Dominique Piou, Nicolas Feau et Benoît Marçais avec la contribution de nombreux correspondants- observateurs L'oïdium des chênes est une des maladies forestières parmi les plus communes.

MAAF 02/05/17 Les variations interannuelles de sévérité de l'oïdium du chêne peuvent-elles s'expliquer par un effet du climat de l'hiver sur Erysiphe quercicola ?

Toutefois, sa prévalence et sa sévérité sont très variables selon les années et les localités, comme le montrent bien les données de la base du Département Santé des Forêts (DSF). L’analyse de ces données, fait apparaître un certain nombre de "pics épidémiques" , en particulier dans le sud-ouest (années 1997- 2001). L’étude a cherché à comprendre si ces pics pouvaient être expliqués par des variables climatiques. De façon plutôt inattendue pour un parasite foliaire, ce ne sont pas les variables climatiques de la saison qui ressortent mais celles de l'hiver précédent. Pour expliquer cette relation statistique, l’INRA a émis l’hypothèse que les hivers doux favoriseraient la survie hivernale du champignon. Analyse de la fréquence locale de formes drapeaux. APS JOURNAL - 2016 - Can oak powdery mildew severity be explained by indirect effects of climate on the composition of the Erysiphe pathogenic complex?

WebImagesPlus…

APS JOURNAL - 2016 - Can oak powdery mildew severity be explained by indirect effects of climate on the composition of the Erysiphe pathogenic complex?

PLoS One. 2016; 11(5): e0155344. Powdery Mildew Decreases the Radial Growth of Oak Trees with Cumulative and Delayed Effects over Years. ECOSPHERE - NOV 2016 - Temporal niche differentiation of parasites sharing the same plant host: oak powdery mildew as a case study. Arch. Biol. Sci., Belgrade, 65 (3), 1069-1077, 2013 EFFECT OF TEMPERATURE, RELATIVE HUMIDITY AND LIGHT ON CONIDIAL GERMINATION OF OAK POWDERY MILDEW (MICROSPHAERA ALPHITOIDES GRIFF. ET MAUBL.) UNDER CONTROLLED CONDITIONS. Annals of Forest Science (2014) 71:633–642 European oak powdery mildew: impact on trees, effects of environmental factors, and potential effects of climate change. BALTIC FORESTRY - 2014 - Impact of Erysiphe alphitoides (Griffon & Maubl.) U. Braun & S. Takam. on Leaf Physiological Parameters in Pedunculate Oak (Quercus robur L.) Saplings. Forest Research Papers - MARS 2015 - Occurrence of Erysiphe alphitoides in oak stands affected by flood disaster.

TREE PHYSIOLOGY 02/10/14 Oak powdery mildew (Erysiphe alphitoides)-induced volatile emissions scale with the degree of infection in Quercus robur. NEW DISEASE REPORTS - 2016 - First record of Erysiphe alphitoides on Wisteria brachybotrys and W. frutescens, and first record of its chasmothecia on Wisteria. G.J.

NEW DISEASE REPORTS - 2016 - First record of Erysiphe alphitoides on Wisteria brachybotrys and W. frutescens, and first record of its chasmothecia on Wisteria

Denton1, J.O. Denton1* and R.T.A. Cook2 1 Plant Pathology, Royal Horticultural Society, Wisley, Woking, Surrey GU23 6QB, UK 2 30 Galtres Avenue, York YO31 1JT, UK In 2014, pale chlorotic spots with occasional cell necrosis occurred mainly on adaxial surfaces of juvenile leaves of Wisteria brachybotrys ‘Murasaki-kapitan’ and W. frutescens ‘Amethyst Falls’ (Fig. 1) at Hyde Hall (Essex) and Wisley (Surrey) Royal Horticultural Society Gardens, respectively.

Mycol Res. 2007 Jul;111(Pt 7):809-26. Epub 2007 Jun 7. Phylogeny and taxonomy of the oak powdery mildew Erysiphe alphitoides sensu lato. ACTA MYCOLOGICA Vol. 44 (1): 109–123 2009 The development of Erysiphe alphitoides and E. hypophylla in the urban environment. WIKIPEDIA ANGLOPHONE – Erysiphe alphitoides. Erysiphe alphitoides is a species of fungus which causes powdery mildew on oak trees. Discovery and taxonomy[edit] Today oak powdery mildew is one of the most common diseases in European forests but it is thought to not always have been present in these forests. The first reports of the disease were made in Paris and other regions of France, Spain, Luxembourg and the Netherlands in 1907. By 1908 the disease had spread into many other European countries, becoming an epidemic. By 1909 it had reached Russia and Turkey, followed by Brazil in 1912 and soon after was distributed around the world.

Recently, molecular biology has provided new tools for identifying species and elucidating their relatedness. Pathology[edit] Only young developing leaves are susceptible to colonisation by E. alphitoides. Effects on host[edit] The disease can be very severe on Quercus robur and Quercus petraea in Europe, particularly on young trees. Susceptible species[edit] References[edit] WIKIPEDIA - Erysiphe alphitoides. Un article de Wikipédia, l'encyclopédie libre. European Journal of Plant Pathology September 2009, Impact of Erysiphe alphitoides on transpiration and photosynthesis in Quercu. Zoological Studies 51(2): 175-184 (2012) Changes in Oak Gall Wasps Species Diversity (Hymenoptera: Cynipidae) in Relation to the.