The EFSA Pest Survey Card on #Phytophthora ramorum (non‑EU isolates) is available as an interactive StoryMap.
🌲Have a look at this key resource supporting harmonised surveillance across the EU🔍: link.europa.eu/NhFkHJ
@forestresearchuk.bsky.social
@inrae-dpt-spe.bsky.social
@purpest-eu.bsky.social
If you manage a plant nursery or are interested in the prevention or management of devastating #Phytophthora spread then this is the seminar for you. @forestresearchuk.bsky.social @phytophthorarc.bsky.social
Scientific studies have demonstrated that numerous declines and diebacks affecting horticultural crops, forests and natural ecosystems in Europe, Australia and the Americas are primarily caused by invasive soil- or airborne pathogens from the genus #Phytophthora.
🌱 Join our webinar on healthy nursery plants & plant biosecurity! Discover how invasive pathogens like #Phytophthora threaten forests & crops & learn practical solutions from leading international experts.
🗓 20 April 2026, 14:00-16:50 (CET)
✍️ Program & registration www.purpest.eu/news/webinar...
Nice article supporting @hutton.ac.uk #fightagainstblight
Hutchinsons Morven Nimmo advice on dealing with new #Phytophthora infestans genotypes.
Advice on effective late blight control in potatoes - Farmers Weekly share.google/jIybEa0DurI0...
Fig. 1. Antagonistic activity of W71 against Phytophthora nicotianae and indole-3-acetic acid (IAA) production. A, antagonistic activity of W71 against P. nicotianae, a, control treatment; b, W71 treatment; c, W71 culture filtrate treatment. B, IAA standard curve. C, Qualitative determination of IAA in W71.
Kai Zhu et al. found that #Streptomyces rochei W71 possesses both plant growth-promoting properties and biocontrol capabilities against tobacco black shank, induced by #Phytophthora nicotianae: https://doi.org/10.1094/PDIS-02-25-0301-RE
FIGURE 1 Sample images of potato late blight progression based on leaf symptoms in the artificially inoculated cultivar Agata compared with healthy leaves. dpi, days postinfection.
Potato late blight affects potato cultivation worldwide. Rosita S. Fratini et al. tested ONT amplicon sequencing as a quantitative method for detecting and monitoring #Phytophthora infestans in artificially inoculated potato plants: https://doi.org/10.1094/PHYTOFR-02-25-0011-R
FIGURE 2 Pathogenicity of Phytophthora palmivora (isolate 23-1093-R) to potted Edgeworthia chrysantha plants in a greenhouse at the end of Trial 1. Symptoms on shoots and roots were evaluated 84 days after not being inoculated (A and C) or after being inoculated (B and D). Plants were grown from rooted cuttings and varied naturally in size.
A South Carolina homeowner submitted samples for diagnosis of young paperbush shrubs that were unthrifty and declining. Steven N. Jeffers et al. present the first report of #Phytophthora palmivora causing root and crown rot on #Edgeworthia chrysantha: https://doi.org/10.1094/PHP-05-25-0143-SC
Welcome to Bsky, @plantdiseaseguy.bsky.social!
And congrats on the new role at @cornelluniversity.bsky.social = )
#PlantPathology #Fungi #VegPathology #Phytophthora #PlantPath #PlantScience
🚨New research alert!🌿@Euphresco just published findings on #Phytophthora in public gardens & nurseries across 6 countries🌍
🌳Could green spaces harbour invasive pathogens and fuel their survival & spread undetected? New data suggests yes🔬
Read more👇
buff.ly/hxlZ23v
#PlantHealth #Biosecurity
Stroken mais of gras naast aardappelen remmen de aantasting door phytophthora, blijkt uit onderzoek van @w-u-r.bsky.social. Gras zorgt voor een droger microklimaat, mais vormt een barrière voor sporen. 🌽 🥔 #phytophthora
Fig. 4. The preventive and curative effect of Streptomyces cavourensis PES4 on the Phytophthora leaf blight of passion fruit. Water, SMG-M medium, and culture broth of S. cavourensis PES4 at 100-fold dilution were spray-applied on the leaves of passion fruits A, 1 day prior to; C, at the same time; and E, 1 day after the inoculation of Phytophthora nicotianae Ph361. B, D, and F, The symptom development on leaves of passion fruit with each treatment is shown. The data presented are means and standard deviation from 10 replicates for each treatment. Percent data were arcsine square root transformed before statistical analysis. Significant differences between the water control and treatment were determined using Student's t-test at P < 0.05 and indicated with an asterisk (*). Water, water was used as a control; SMG-M, SMG-M medium; PES4, treatment with cultural broth of S. cavourensis PES4 at 100-fold dilution. Scale bar, 5 cm.
Results from Yu-Hsuan Chen et al. demonstrated that #Streptomyces cavourensis PES4 exhibited strong antagonistic activity against several bacterial, fungal, and oomycete pathogens, including #Phytophthora nicotianae. Learn more: https://doi.org/10.1094/PDIS-01-25-0089-RE
Fig. 1. Standard curves for cox2 and ypt1 (McDougal et al. 2021) assays using a fivefold serial dilution of Phytophthora pluvialis (NZFS 3032) DNA. qPCR was carried out using six technical replicates. Coefficient of determination (R2), slope, and amplification efficiency are presented. Error bars represent the standard deviation. Neither assay showed positive amplification at the lowest serial DNA dilutions corresponding to 2.56 fg of DNA per qPCR. Cq, quantification cycle.
#Phytophthora pluvialis is present in the United States, New Zealand, the United Kingdom, and Belgian forests. R. O'Neill et al. designed a qPCR assay targeting a multiple-copy mitochondrial gene to increase the sensitivity of P. pluvialis detection: https://doi.org/10.1094/PHYTO-01-25-0020-R
Thanks to Adam Clarke @farmersweeklyuk.bsky.social for reporting @hutton.ac.uk FAB first sampling of EU43 clone of #Phytophthora infestans in UK.
Fungicide-resistant late blight strain detected in UK for first time - Farmers Weekly share.google/HJanHeYV5nB8...
Thanks to many for flagging this great study from @mfseidl.bsky.social group. Love the way they use pangenome analysis to get a grip on the messy evolution of effectors in #Peronospora effusa. Would it work with almost 3x larger #Phytophthora infestans genome? Hope so.
Glastuinders kunnen de weerbaarheid van hun gewassen verhogen door #compost toe te voegen aan bodem of substraat. Onderzoek van @w-u-r.bsky.social toont aan dat dit natuurproduct niet alleen de bodem verrijkt, maar ook ziektes als #phytophthora onderdrukt. ✅
P.S.: The (beer) cap lifter was immediately classified as laboratory /office equipment by the #Phytophthora Research Team (as important as the coffee machine 😊!)
Thomas Jung ( #Phytophthora Research Centre, Mendel University in Brno) presented his experience with project Purpest @purpest-eu.bsky.social :
What works in Horizon Europe: experiences, challenges and tips?
Prof. Yuanchao Wang team at Nanjing Agricultural University #NAU developed the #toGC: A pipeline to correct #gene model for functional excavation of dark #GPCRs in #Phytophthora sojae
❇️https://doi.org/10.1016/j.jia.2024.03.077
@keaipublishing.bsky.social
Screen grab from Phytopathology stating that paper titled "Preserving the Biologically Coherent Generic Concept of Phytophthora, "Plant Destroyer"." was the most read article of 2025
And another update to thank the readership of Phytopathology for making this the most-read article of 2025. #Phytophthora
Serieuze aardappelpraat, zeg ik…
Dit was voor een artikel over sporenvangers (aanwezigheid van de aardappelziekte #phytophthora meten in de lucht)
#aardappel
#WUR
#kollumerwaard
#SPNA
#JJC2026 Awa Sangare @inrae-pv.bsky.social shows that the response of #tomato plants to #biocontrol against #Phytophthora infestans can be improved through
#breeding
Fig. 7. Pictures from in vitro assays to assess treatment inhibition of Phytophthora infestans mycelial growth. Treatments shown include A, negative water control; B, copper (full) dosage; C, Frangula alnus high dosage, nonfiltered; D, F. alnus high dosage, filtered; E, F. alnus medium dosage, nonfiltered; F, F. alnus medium dosage, filtered; G, F. alnus low dosage, nonfiltered; and H, F. alnus low dosage, filtered. The bacterium associated with the F. alnus bark that colonized the plates in treatments shown in panels C and E was identified to be an Erwinia spp.
Potato late blight (PLB), caused by #Phytophthora infestans, can cause extensive economic damage. Through in vitro and in planta experiments, Tomke Musa et al. investigated whether #Frangula alnus directly or indirectly controlled PLB. Learn more: https://doi.org/10.1094/PDIS-12-24-2582-RE
Sounds an interesting exploration of #Phytophthora threats to Seagrass. Hope a good student applies and makes headway.
#Fungal allies arm #plant #roots against #disease by rewriting the rules of #infection ...
| #fungi | #pathogen | #microbes | #Funneliformis | #Phytophthora | By @cam.ac.uk via @sciencex.bsky.social
Significant new paper out from the Syngenta team. Guiding blight management. #Euroblight #Phytophthora
New Mechanisms of Resistance to CAA and OSBPI Fungicides in Phytophthora infestans - Torriani - Plant Pathology - Wiley Online Library bsppjournals.onlinelibrary.wiley.com/doi/10.1111/...
Sudden #oak #death #pathogen detected for the first time in #Minnesota nursery ...
| #SuddenOakDeath | #disease | #Phytophthora | #oomycete | Via @sciencex.bsky.social
Frost finally ended this year’s S. chilense field screening.
Many plants survived multiple waves of #Phytophthora… but not this week’s snow and cold.
Time to clean up and start planning for next season.
#plants #lablife #wildtomatoes #PlantScience #QDR
🌲 Phytophthora ramorum remains a major threat to Europe's forests 🌍
A new modeling study by Kartakis et al. forecasts its disease impact and the economic costs.
Find out more 👉 www.purpest.eu/news/stelios...
#Phytophthora #ForestPathology #Biosecurity
