Frédéric Suffert
@wheatpath
Plant disease epidemiologist @INRAE_France studying wheat fungal pathogens, mostly Zymoseptoria | Enthusiatic about rust & wild pathosystems | IngAgro PhD IHEDN
#Smut fungus on erect brome (#Bromus erectus) – here malformed and sterile – caused by #Tranzscheliella hypodytes (syn. #Ustilago hypodytes), with stems inside the leaf sheaths covered by dense masses of very small, dark brown spores, measuring 5–6 × 4–5 µm (Millau, FR).
Stem #rust on false oat-grass (#Arrhenatherum elatius) caused by #Puccinia graminis (Millau, FR).
#Rust on false oat-grass (#Arrhenatherum elatius) caused by #Puccinia coronata (Millau, FR).
#Smut fungus on barren brome (#Bromus sterilis) caused by #Ustilago bullata (Millau, FR).
'Tar spot' on couch grass (#Elymus repens) caused by #Phyllachora graminis (Aguessac, FR).
The range of the key oversummering regions of #Puccinia striiformis f. sp. tritici in northwestern #China has expanded westward doi.org/10.1094/PHYTO-…
Éventuellement pour ceux qui se demandent d’où viennent les sclérotes de LSD : 1️⃣ dans les orges qui ont suivi ces blés 2️⃣ dans les blés de semence de renouvellement 3️⃣ dans les futures cultures si les bonnes décisions Agro ne sont pas prises. @carribou3000 @Arvalisofficiel
Rencontre psychotrope 🚬 ☠️ mais bucolique 🍄 dans une parcelle d’Extase @OlivierCOSTE2! Je peux compléter les VRAI/FAUX d’@Arvalisofficiel … #ergot #JaimelesÉpis mais pas tous
Shapes and hues — orange, brown, black on green — vivid or blending, silken, bristly, sharp, often powdery... Let us wager that the phenotypic & genotypic diversity of #Puccinia graminis on wild (mostly) and cultivated #grasses (less ) is locally as rich as symptoms 🤩.
Two months after the survey on #Berberis vulgaris, a return to Burgundy near #Dijon with Alicia and Ulysse to search for stem #rust on wild #grasses and possibly on cultivated cereals growing along the edges.
I wouldn’t be surprised if we prove some level of sexual recombination in PST pops. around the Rockies! There’re unpublished reports of natural PST infection on Mahonia (Oregon Grape) & we’ve lots of that around Rockies. Many interesting questions for us to work on. @globalrust
PST isolates vary in their ability to produce telia. Here in British Columbia, most of the studied isolates show a high degree of telial production, in addition to exhibiting a high diversity of races (DOI:10.13140/RG.2.2.20445.42726) @CBL_UA @ubcLFS
Two months after the survey on #Berberis vulgaris, a return to Burgundy near #Dijon with Alicia and Ulysse to search for stem #rust on wild #grasses and possibly on cultivated cereals growing along the edges.
#Rust aecia on #Berberis vulgaris caused by #Puccinia graminis, sometimes found just a few centimeters from grass stems (e.g., Dactylis glomerata, Bromus sterilis) that bore telia from the previous year (Chenôve, France).
Wheat’s Defenses Breached: New Strain of Yellow Rust Overcomes Key Resistance Gene Across Europe @niabgroup @gatesfoundation bgri.cornell.edu/wheats-defense…
Après le charbon nu, l’ergot voici le 3ème larron que nous allons produire à tout azimut avec cette protection de Semences mis à mal par les retraits à venir. @OlivierCOSTE2 @OBerjeonnat le fumet est agréable 🐟 Faut il voir avec un dentiste 🦷 @UFSemenciers @semae_officiel ?
#Rust of hedge bindweed (Calystegia sepium) caused by #Puccinia convolvuli, here hyperparasitized by #Tuberculina persicina (Mortagne-au-Perche, FR).
#Rust on field milk thistle (Sonchus arvensis) caused by #Coleosporium sonchi, grazed by Mycodiplosis sp. larvae (Bellême, FR).
#Rust of meadow starwort (Stellaria palustris) caused by #Puccinia arenariae (Manoir de Courboyer, Perche-en-Nocé, FR).
#Rust on broad-leaved enchanter's nightshade (Circaea lutetiana) caused by #Pucciniastrum circaeae (Bellême, FR).
