File:Chalarose du Frêne 2011 quadrats DSF.jpg

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Français : Chalarose du Frêne en 2011 [méthode des quadrats, source : DSF (direction de la santé des forêts)]
English: Map of trees infected by Hymenoscyphus fraxineus in France in 2011 ; this pathogen is an Ascomycete fungus that causes "ash dieback", a chronic fungal disease of ash trees in Europe characterised by leaf loss and crown dieback in infected trees. The fungus was first scientifically described in 2006 under the name Chalara fraxinea. Four years later it was discovered that Chalara fraxinea was only the asexual (anamorphic) stage of a fungus that was subsequently named Hymenoscyphus pseudoalbidus and then renamed as Hymenoscyphus fraxineus.
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Author Lamiot

source : DSF, ministère de l'Agriculture et des forêts, créée en 1989, ce "Département de la santé des forêts" est chargé de la surveillance sanitaire des forêts françaises de métropole.

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current10:37, 7 May 2018Thumbnail for version as of 10:37, 7 May 2018802 × 830 (235 KB)Lamiot (talk | contribs)User created page with UploadWizard

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