#PlantBiosecurity

Marília Horta Jung 🇵🇹🇪🇺🇨🇿🇺🇦

@phytophthorarc.bsky.social

2 weeks ago

@epponews.bsky.social @efsa-plants.bsky.social
@iufro.bsky.social @fao.org @ipsn-bgci.bsky.social
@biodiversa.eu @bspp.bsky.social @wwf.eu @greenpeace.eu

#PlantPathogens
#PlantBiosecurity
#Oomycetes

#NatureRestoration
#Forestry
#Horticulture
#PlantNurseries

Participation is free!

Marília Horta Jung 🇵🇹🇪🇺🇨🇿🇺🇦

@phytophthorarc.bsky.social

4 months ago

Phytophthora ramorum is an invasive generalist plant pathogen introduced to North America and Europe in the mid-1990s and is now established in forests and the nursery industry. It causes sudden oak death in the western US and sudden larch death in Western Europe, leading to extensive forest decline and mortality. While well studied in California and Oregon, no quantitative assessment exists for its potential economic impact on European forestry. We assessed the potential direct economic impact of P. ramorum on larch and beech in Europe under a “no-control” scenario. Climatically optimal areas for disease expression were derived using the CLIMEX niche model with refined parameter values, updated climate data, and P. ramorum occurrence records from symptomatic forest trees. These areas were overlaid with host distribution data to identify assets at risk. We then applied a radial range expansion model and a partial budgeting method to quantify annualized average damage costs. Our results indicate that 10 % of the study area is climatically optimal for disease expression. Within that area, 4 223 km² of larch and 2 577 km² of beech are at risk. Under worst-case spread and mortality assumptions, annual direct damage costs could exceed €117 million for larch and €130 million for beech. Countries such as the UK, Italy, Austria, and Germany face the highest risks, while potential impacts in Southern Europe are negligible. This study provides an updated risk assessment of the current post-invasion state of P. ramorum in Europe, facilitating informed decision-making and the development of appropriate management strategies.

Work of Stelios Kartakis on the framework of @purpest-eu.bsky.social project:

"Modeling disease expression of #Phytophthora ramorum to estimate potential #EconomicImpacts in #EuropeanForests"

doi.org/10.1016/j.fo...

#ForestPathogen
#PlantBiosecurity
#InvasivePlantPathogen
#Oomycete

Marília Horta Jung 🇵🇹🇪🇺🇨🇿🇺🇦

@phytophthorarc.bsky.social

4 months ago

Pest survey card on Phytophthora ramorum (non‐EU isolates) This document provides the conclusions of the pest survey card that was prepared in the context of the EFSA mandate on plant pest surveillance (M‐2020‐0114) at the request of the European Commission. ...

Pest survey card on #Phytophthora ramorum (non‐EU isolates) | EFSA
www.efsa.europa.eu/en/supportin...

@efsa.europa.eu

#PlantHealth
#PlantBiosecurity
#InvasivePlantPathogens
#Oomycete

Marília Horta Jung 🇵🇹🇪🇺🇨🇿🇺🇦

@phytophthorarc.bsky.social

6 months ago

Join us today, at 16h00 in the Plenary - RED ROOM:
Thomas Jung (Mendel University in Brno) "Urgent need for EU regulation and nursery accreditation schemes to prevent spread of introduced #InvasivePlantPathogens via #RestorationActivities."

#EuroGard2025 #EuroGard10

#Oomycetes #PlantBiosecurity

Marília Horta Jung 🇵🇹🇪🇺🇨🇿🇺🇦

@phytophthorarc.bsky.social

9 months ago

Worldwide forest surveys reveal forty-three new species in #Phytophthora major Clade 2 with fundamental implications for the evolution and #biogeography of the genus and global #PlantBiosecurity.

#Taxonomy
#Systematics
#Speciation
#Biodiversity
#Oomycetes

Marília Horta Jung 🇵🇹🇪🇺🇨🇿🇺🇦

@phytophthorarc.bsky.social

9 months ago

Preserving the Biologically Coherent Generic Concept of Phytophthora, “Plant Destroyer”: “We can see no reason why a Darwinian should adopt the concept of paraphyly” (Ernst Mayr and Walter Bock 2002): Phytopathology®: Vol 0, No 0 Phytophthora is a long-established, well-known, and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolved from Phytophthora at least twice. Because, cladistically, this renders Phytophthora “paraphyletic,” it has been proposed that Phytophthora evolutionary clades be split into multiple genera (Crous et al. 2021; Runge et al. 2011; Thines 2023, 2024). In this letter, we review arguments for the retention of the generic name Phytophthora with a broad circumscription made by Brasier et al. (2022) and by many delegates at an open workshop organized by The American Phytopathological Society. We present our well-considered responses to the genus splitting proposals, both in general terms and in terms of the specific proposals for new genera, alongside new information regarding the biological properties and mode of origin of the Phytophthora clades. We consider that the proposals are mostly non-rigorous and not supported by the scientific evidence. Further, given (i) the apparent lack of any distinguishing biological characteristics (synapomorphies) between the Phytophthora clades; (ii) the fundamental monophyly of Phytophthora in the original Haeckelian sense (Haeckel 1877); (iii) the fact that paraphyly is not a justification for taxonomic splitting; and (iv) the considerable likely damage to effective scientific communication and disease management from an unnecessary breakup of the genus, we report that workshop delegates voted unanimously in favor of preserving the current generic concept and for seeking endorsement of this view by a working group of the International Commission on the Taxonomy of Fungi. Copyright © 2025 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Just published, #Phytopathology, Letter to the Editor:
Preserving the Biologically Coherent Generic Concept of #Phytophthora, “Plant Destroyer”.

#DownyMildews
#Oomycetes
#Taxonomy
#Systematics
#Paraphyly
#Phylogeny
#Cladistics
#PlantBiosecurity
#ScientificCommunication
#PlantDiseaseManagement

Action Oak

@actionoak.bsky.social

10 months ago

Sara Redstone from @The_RHS presents "Biosecurity at the Royal Horticultural Society".

🌳🌳🌳

#ActionOak
#ActionOakPartnerEvent25
#PlantHealthScience
#PlantHealth
#WomeninScience
#PlantBiosecurity
#RHS
#PlantHealthy
#Biosecurity
#RoyalHorticulturalSociety

Marília Horta Jung 🇵🇹🇪🇺🇨🇿🇺🇦

@phytophthorarc.bsky.social

1 year ago

Preserving the Biologically Coherent Generic Concept of Phytophthora, ‘Plant Destroyer’ | Phytopathology® Phytophthora is a long-established, well known and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolve...

Just out, First Look version:
Preserving the Biologically Coherent Generic Concept of #Phytophthora, ‘Plant Destroyer’ | #PhytoPathology
apsjournals.apsnet.org/doi/10.1094/...

#Oomycetes #Taxonomy #Phylogeny #Cladistics #Paraphyly #PlantBiosecurity #ScientificCommunication #PlantDiseaseManagement

Nirodha Weeraratne

@nirodhaweeraratne.bsky.social

1 year ago

✅️ Combating #misinformation
✅️ Supporting #plantbiosecurity
✅️ Living in the bush capital
✅️ Working with a great team

Ginette Alexander

@green-goddess.bsky.social

1 year ago

Just got here and looking for my gang! 🌳🌲🪲🦠🪳
#treehealth #planthealth #biosecurity #plantbiosecurity #citizenscience #plantpathology #STEM #plantsarecool #plantsVzombies #xylella #EAB #OPM #PPM #BBB #ashdieback #ALB #planelacebug #oaklacebug #phytophthora #forestschool #treehealthengagement