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Pascal Frey

@pascal-frey.bsky.social
586 followers 620 following 296 posts

Forest pathologist at @inrae-france.bsky.social Head of @umr-iam.bsky.social Ecology, epidemiology and population biology of forest fungal pathogens 🌳🌲🍄🦠🧬 mycor.iam.inrae.fr/IAM/?page_id=731 Views are mine Proud 🇪🇺 #biketowork 🚴 #StandWithUkraine 🇺🇦

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Pascal Frey @pascal-frey.bsky.social · 01/09/2026
Same location. Same plants. Same rust fungus as seen in 2021. Uromyces plumbarius on Oenothera lindheimeri (Gaura), Lunéville, FR. #Rust #RustFungus #UrbanPlantHealth @wheatpath.bsky.social @erikslootweg.bsky.social doi.org/10.1007/s106...
Oenothera lindheimeri (Gaura) plantsUredinia of Uromyces plumbarius on Oenothera lindheimeri Uredinia of Uromyces plumbarius on Oenothera lindheimeri (x20)Urediniospores and teliospores of Uromyces plumbarius on Oenothera lindheimeri (x400)
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Pascal Frey @pascal-frey.bsky.social · 22/07/2026
It's DED season! #DutchElmDisease #Ophiostoma novo-ulmi #TreeHealth #ForestPathology
A young Elm tree showing typical symptoms of Dutch Elm Disease (wilted leaves).Detail of a young Elm tree showing typical symptoms of Dutch Elm Disease (wilted leaves).Detail of Elm shoots showing typical symptoms of Dutch Elm Disease (wilted leaves).
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Pascal Frey @pascal-frey.bsky.social · 11/07/2026
Visiting 🇨🇦 ? No! Pays des Mille Étangs, Haute-Saône, France.
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Pascal Frey @pascal-frey.bsky.social · 11/06/2026
Reportage de #SilenceCaPousse #France5 sur l'émergence des maladies forestières avec les équipes de pathologie forestière de #UMR-BioGeCo et @umr-iam.bsky.social www.france.tv/france-5/sil... (21' - 28') @inrae-france.bsky.social @univbordeaux.bsky.social @univlorraine.bsky.social
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Pascal Frey @pascal-frey.bsky.social · 10/06/2026
Et le texte intégral 👇
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Pascal Frey @pascal-frey.bsky.social · 13/05/2026
Et aussi de nombreuses infographies tirées de l'ouvrage remarquablement pédagogique "La biodiversité en infographies" de @tatianagiraud.bsky.social aux éditions Tana (disponible dans toutes les bonnes librairies)
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Pascal Frey @pascal-frey.bsky.social · 13/05/2026
Avec aussi la très drôle dessinatrice de presse Coco qui a croqué en direct les conférenciers 👇
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Pascal Frey @pascal-frey.bsky.social · 13/05/2026
Conférence passionnante sur la #Biodiversité, avec @tatianagiraud.bsky.social, Jean-François Silvain & Charles Stepanoff, dans le cadre du Biodiv’Estival et du programme européen LIFE Biodiv'Est. biodiversite.grandest.fr/evenements/c...
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Pascal Frey @pascal-frey.bsky.social · 25/04/2026
Flag-shoot symptoms of the poplar rust Melampsora aecidioides on white poplar Populus alba. Château de Chaumont sur Loire.
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Pascal Frey @pascal-frey.bsky.social · 08/04/2026
Tournage d'un reportage TV sur les maladies forestières émergentes pour #Silencecapousse #France5 @francetv.bsky.social #ChalaroseDuFrene #AshDieback #ForestHealth #TreeHealth
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Pascal Frey @pascal-frey.bsky.social · 02/04/2026
Montmartre, Paris 😍 #biketowork 🚴‍♂️ #velotaf #Velib
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Pascal Frey @pascal-frey.bsky.social · 01/04/2026
Yet another nice commute in #Paris this morning 🚴‍♂️😎 #biketowork #velotaf
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Pascal Frey @pascal-frey.bsky.social · 26/03/2026
Lots of 🚴🚴‍♀️🚴‍♂️🚴🚴‍♀️🚴‍♂️ on the Boulevard de Sebastopol in Paris
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Pascal Frey @pascal-frey.bsky.social · 26/03/2026
Nice weather for a 🚴‍♂️ ride in Paris 😍 #biketowork #velotaf
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Pascal Frey @pascal-frey.bsky.social · 26/03/2026
The @standupforscifr.bsky.social rally in the streets of Paris today ✊ #StandUpForScience @standupforscience.net
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Pascal Frey @pascal-frey.bsky.social · 26/03/2026
Our #INRAE CEO talks about the #StandUpForScience movement
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Pascal Frey @pascal-frey.bsky.social · 25/03/2026
Cool #Velib commute in #Paris tonight. Merci Paris 😍 #biketowork #velotaf
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Pascal Frey @pascal-frey.bsky.social · 21/03/2026
Happy International Day of Forests! #IntlForestDay
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Pascal Frey @pascal-frey.bsky.social · 13/03/2026
How it started ⏩ How it ended A weeping polypore (Pseudoinonotus dryadeus) has totally destroyed the base of a 1-m-diameter red oak (Quercus rubra) in the Amance Arboretum. #ForestHealth #TreeHealth #ForestPathology
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Pascal Frey @pascal-frey.bsky.social · 13/03/2026
#WhitePineBlisterRust (Cronartium ribicola) on limber pine (Pinus flexilis) in the Amance Arboretum #ForestHealth #TreeHealth #ForestPathology
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Pascal Frey @pascal-frey.bsky.social · 13/03/2026
Forest Pathology field trip in the Amance Arboretum with Master students #DothistromaNeedleBlight #DiplodiaShootBlight #ForestHealth #TreeHealth #ForestPathology
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Pascal Frey @pascal-frey.bsky.social · 03/03/2026
Spring is back in Lorraine! Amance Forest. #Biketowork
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Pascal Frey @pascal-frey.bsky.social · 25/02/2026
L'article complet
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Pascal Frey @pascal-frey.bsky.social · 12/02/2026
Happy #DarwinDay! Charles Darwin was born 217 years ago, on 12 February 1809. In an increasingly uncertain world, his thoughts are more topical than ever.
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Pascal Frey @pascal-frey.bsky.social · 16/01/2026
Last evening session at #JJC2026 🎉🥳🎊🎈
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Pascal Frey @pascal-frey.bsky.social · 16/01/2026
The scientific committee of #JJC2026 ready for the last evening session 😉
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Pascal Frey @pascal-frey.bsky.social · 06/01/2026
Winter is coming… Amance Forest
A snowy forest road in the Amance Forest, Lorraine, Northern France.
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Pascal Frey @pascal-frey.bsky.social · 19/12/2025
The last PhD defense of the year! Congratulations Dr. Elodie Muller on your thesis on the #ecological #dynamics of an invasive #pathogen, Cryptostroma corticale, causing #SootyBarkDisease of #Maple trees! 👏👏👏👨‍🎓🎓🌳🍄📊📈 #ForestHealth #ForestPathology
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Pascal Frey @pascal-frey.bsky.social · 17/12/2025
End-of-the-year lunch of the Ecology team of @umr-iam.bsky.social at Simone's restaurant 🎄🧑‍🎄☃️
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Pascal Frey @pascal-frey.bsky.social · 10/12/2025
Second 🚴‍♂️ride of the day, this time in #Bordeaux 😍 with #LeVelo from @infotbm.com #Biketowork #Velotaf
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Pascal Frey @pascal-frey.bsky.social · 10/12/2025
Cool #Velib ride between 2 railway stations in downtown #Paris 😍 #NotreDame #Biketowork #Velotaf 🚴‍♂️
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Pascal Frey @pascal-frey.bsky.social · 20/11/2025
Winter is coming…
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Pascal Frey @pascal-frey.bsky.social · 18/11/2025
#E-PoPP2025: Fabien Halkett @umr-iam.bsky.social on population genetics of partially clonal organisms doi.org/10.1101/2025...
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Pascal Frey @pascal-frey.bsky.social · 18/11/2025
#E-PoPP2025: @ammarabdalrahem.bsky.social @umr-iam.bsky.social on #evolutionary #ecology of #asexual lineages of the #poplar #rust #fungus 🌳🍄 #ForestHealth
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Pascal Frey @pascal-frey.bsky.social · 18/11/2025
#E-PoPP2025: Kadiatou Schiffer-Forsyth @umr-iam.bsky.social about inter- and intraspecific spatio-temporal evolution in the #poplar #rust fungi 🌳🍄 #ForestHealth
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Pascal Frey @pascal-frey.bsky.social · 18/11/2025
#E-PoPP2025: Fabien Halkett @umr-iam.bsky.social about a non-conventional #avirulence locus in the #poplar #rust fungus 🌳🍄 #ForestHealth
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Pascal Frey @pascal-frey.bsky.social · 18/11/2025
Meeting of the E-PoPP network ( #Ecology and #Evolution of #Plant #Pathogenic #Populations 🌱🍄🦠🪱) in #Paris at the #Totem amphitheater #E-PoPP2025
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Pascal Frey @pascal-frey.bsky.social · 13/11/2025
En ce 13 novembre 2025, une pensée pour les victimes du #Bataclan. 💔💔💔 10 ans déjà.
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Pascal Frey @pascal-frey.bsky.social · 04/11/2025
The pinewood nematode is classified as a ‘priority quarantine organism’ in the EU. It can be vectored by the native European beetle Monochamus galloprovincialis.
The native European beetle Monochamus galloprovincialis, vector of the pinewood nematode (© INRAE Bordeaux)
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Pascal Frey @pascal-frey.bsky.social · 04/11/2025
Bad news for the French Pine forests! 😩 First outbreak of the #Pinewood #Nematode Bursaphelenchus xylophilus on Maritime #Pine (Pinus pinaster) in the Landes de Gascogne Forest (Southwest France). #PWN #ForestHealth #ForestPathology agriculture.gouv.fr/sante-des-ve...
A male pinewood nematode (Bursaphelenchus xylophilus) under the microscope (©EPPO).
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Pascal Frey @pascal-frey.bsky.social · 02/11/2025
Inonotus dryadeus, the oak bracket or weeping polypore (polypore larmoyant) growing through a piece of fence at the foot of a red oak (Quercus rubra) tree. The fruiting body secretes an amber liquid which weeps from tubes. Amance Arboretum, FR.
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Pascal Frey @pascal-frey.bsky.social · 01/11/2025
Craterellus cornucopioides, the horn of plenty or black chanterelle (trompette de la mort). Forêt d'Amance, FR. 😋
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Pascal Frey @pascal-frey.bsky.social · 01/11/2025
Mycena pura, the lilac bonnet (Mycène pur). Forêt d'Amance, FR.
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Pascal Frey @pascal-frey.bsky.social · 01/11/2025
Ramaria stricta (strict-branch coral, clavaire droite). Forêt d'Amance, FR.
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Pascal Frey @pascal-frey.bsky.social · 01/11/2025
Mycetinis alliaceus (syn. Marasmius alliaceus), the garlic parachute (marasme à odeur d'ail) Forêt d'Amance, FR.
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Pascal Frey @pascal-frey.bsky.social · 01/11/2025
Laetiporus sulphureus (Chicken-of-the-woods, Polypore soufré) on a willow (Salix alba) trunck, Mazerulles, FR.
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Pascal Frey @pascal-frey.bsky.social · 31/10/2025
Packed room for Emma Corre's PhD defense on transposable elements in rust fungi genomes. Congratulations Dr @emma--c.bsky.social 👏👏👏 And what a lovely tribute to Barbara McClintock who discovered transposable elements in 🌽!!!
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Pascal Frey @pascal-frey.bsky.social · 31/10/2025
Fantastic day in the Amance Arboretum, sampling #pine needles with #DothistromaNeedleBlight symptoms with @kathrinblumenstein.bsky.social and Yasin Korkmaz from @uni-freiburg.de on many Asian, European and American pine species.
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Pascal Frey @pascal-frey.bsky.social · 22/10/2025
PhDone! Congratulations Dr. @ammarabdalrahem.bsky.social! 👏👏👏👨‍🎓🎓 A big thank you to @tatianagiraud.bsky.social, @sofarndhnd.bsky.social & @wheatpath.bsky.social for being on the PhD jury! 📸 @mireiagoga.bsky.social
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Pascal Frey @pascal-frey.bsky.social · 26/09/2025
#GEFF-GFPF: Valentin Queloz @wslresearch.bsky.social on #Chalara #Ash Dieback
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