Pascal Frey
@pascal-frey.bsky.social
450 followers 510 following 160 posts
Forest pathologist at @inrae-france.bsky.social Head of @umr-iam.bsky.social Ecology, epidemiology and population biology of forest fungal pathogens 🌳🌲🍄🦠🧬 https://mycor.iam.inrae.fr/IAM/?page_id=731 Views are mine. #biketowork 🚴 #StandWithUkraine 🇺🇦
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Reposted by Pascal Frey
lukaslarge.bsky.social
Nature book challenge. A book per day in no particular order, until you've shared ALL of the best nature books in your personal library. No explanations, no reviews.
#Books #Nature #Naturewriting #naturebooks #conservation #naturebookchallenge #booksky #MycoBookClub
Book cover: Faszinierende Pflanzenpilze Erkennen und Bestimmen by Julia Kruse
pascal-frey.bsky.social
According to the color of uredinia (pale yellow) and the morphology of urediniospores (elongated, smooth apical patch, equatorial wall thickening) I would bet on Melampsora larici-populina.
norwichbirder.bsky.social
As well as the aphid galls, I noticed that this poplar leaf had a rust fungus on it. It's a Melampsora sp., but several can be found on this host.
Underside of a poplar leaf - its a pale green but there are small orangey-yellow clusters of a rust fungus A close-up of part of the poplar leaf showing the yellowy-orange rust fungus Melampsora rust spores viewed under the microscope. They are pale orange, sausage-shaped spores with some spiny texture visible.
Reposted by Pascal Frey
wheatpath.bsky.social
Après la journée des scolaires, les collègues @inrae-bioger.bsky.social se mobilisent ce week-end pour faire découvrir les #champignons - bons, brutes & truands ! - sous toutes leurs facettes au grand public pour la #FêteDeLaScience à l’ENS Paris-Saclay @univparissaclay.bsky.social. Venez nombreux !
pascal-frey.bsky.social
Heureux comme un mycologue entouré de ses 🍄 préférés !
Reposted by Pascal Frey
wheatpath.bsky.social
#Rust on brown knapweed (#Centaurea jacea agg.) likely caused by #Puccinia jaceae, found today along the Ru de Gally (Villepreux, France) while collecting diseased plants to prepare for next weekend’s French Science Festival #FêteDeLaScience.
Reposted by Pascal Frey
wheatpath.bsky.social
Collecte de champignons - bons, brutes ou truands !? - à présenter en fin de semaine à l'occasion de la #FêteDeLaScience 🔽
Reposted by Pascal Frey
ericlagadec.bsky.social
RIP Jane Goodall.
Tu as été une brillante scientifique, qui a pu montrer que les sciences c'était aussi pour les femmes!
Jane Goodall avec un petit chimpanzé
pascal-frey.bsky.social
A daily reminder that Russia is a terrorist state.
avalaina.bsky.social
Russia once again assured the UN that it wants peace, but bombed peaceful cities in Ukraine for 12 hours straight. Four people died in Kyiv, including a nurse and a patient at the cardiology institute. A whole street was destroyed in Petropavlivskyi Borshchagovka.
pascal-frey.bsky.social
#GEFF-GFPF: Valentin Queloz @wslresearch.bsky.social on #Chalara #Ash Dieback
pascal-frey.bsky.social
#GEFF-GFPF: @mireiagoga.bsky.social @umr-iam.bsky.social on Sooty Bark Disease of #Maple trees 🌳
pascal-frey.bsky.social
#GEFF-GFPF: Kadiatou Schiffer-Forsyth @umr-iam.bsky.social on population genetics of #poplar #rust
pascal-frey.bsky.social
#GEFF-GFPF: Méline Poch @umr-iam.bsky.social on #Diplodia Shoot Blight inoculum dynamics
pascal-frey.bsky.social
#GEFF-GFPF Field trip: @umr-iam.bsky.social was well represented (and 2 others were missing)
pascal-frey.bsky.social
#GEFF-GFPF Field trip: #cockchafer damages on roots of many broadleaf trees
pascal-frey.bsky.social
#GEFF-GFPF Field trip: #Armillaria ostoyae damages on young maritime #pine plants
pascal-frey.bsky.social
#GEFF-GFPF Field trip in the Bitcherland (Moselle): tree diseases, insect pests and a lot of ☔️
Reposted by Pascal Frey
norwichbirder.bsky.social
One from the front garden this morning, I noticed some discoloured dock leaves and on closer inspection the culprit was a rust fungus, which I think must be Uromyces rumicis. Spore pictures here show the outlines and separately give an impression of the ornamentation.
The underside of a dock leaf, mostly discoloured yellow with fine brown speckling. A microscope image of rust spores, pale brown and a range of shapes although mostly rounded. The same spores as shown previously, but the focus adjusted so that the texture is visible for some of the spores, revealing them to be finely spiny.
Reposted by Pascal Frey
ruhrpottpilze.bsky.social
Puccinia divergens ex Carlina vulgaris

#Carlinavulgaris #Carlina #Golddistel #carlinethistle #Carlinecommune #carlinacomune #carlinademonte #Pucciniadivergens #Puccinia #RustFungus #Rostpilz #Phytopathology #mushroom #mushrooms #fungus #fungi #pilz #champignon #nature #natur #FungiFriends
Reposted by Pascal Frey
ruhrpottpilze.bsky.social
Puccinia semadenii ex Peucedanum palustre

#Peucedanumpalustre #Peucedanum #SumpfHaarstrang #milkparsley #Peucédandesmarais #apiolechal #Pucciniasemadenii #Puccinia #Rustfungus #Rostpilz #Phytopathology #mushroom #mushrooms #fungus #fungi #pilz #pilze #champignon #nature #natur #FungiFriends
pascal-frey.bsky.social
#GEFF-GFPF: @mireiagoga.bsky.social @umr-iam.bsky.social on susceptibility of Aleppo and Scots #Pines to #Diplodia Shoot Blight