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7.02.09 - Phytophthora diseases on forest trees

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2023-06-29

Mark your calendars!

11th Meeting of the IUFRO Working Party 7.02.09: Phytophthora in Forests and Natural Ecosystems
Paihia, New Zealand; 8-13 September 2024

Forests and natural ecosystems provide critical ecosystem, cultural and economic services worldwide. Foundational plants within these systems are increasingly challenged by emergent invasive biotic threats due to climatic and anthropogenic driven change and increasing movement of people and goods across biogeographic zones. Phytophthora pathogens are one key group of invasive plant pathogens that are having a disproportionate impact on forests and native ecosystems internationally, with devastating consequences for the forest ecology, culture and economies.

With climate change, Aotearoa/New Zealand is seeing a range of impacts from well-established and emergent Phytophthora pathogens. Since the 2000s the recognition of Phytophthora agathidicida as the primary causal agent of kauri dieback has seen focus shift back to the role these introduced pathogens are having within our natural ecosystems. In parallel, the introduction and establishment of Phytophthora pluvialis has seen red needle cast establish as a widespread needle disease of radiata pine, the predominant commercial forestry species in New Zealand.

New Zealand’s response to pathogens impacting forests and natural ecosystems is uniquely shaped by the inclusion of kaitiaki (Māori guardians), recognition of mātauranga Māori (Māori knowledge) and the adoption of the principles and practices of Māori kaitiakitanga (guardianship). The use of Māori knowledge in New Zealand forest conservation has a key role in shaping the longer-term strategic goals of research, policy and the operationalisation of Māori-led management and research priorities in forest health. This conference will showcase several research partnerships and the operational work happening in the forest in response to the growing body of knowledge and understanding of the impacts these pathogens are having in New Zealand’s unique forest systems.

This conference will provide the ideal forum for updating knowledge, evidence, solutions and failures between scientific, academic and practical approaches. It is also an opportunity to enhance the dialogue of long experienced expertise with the new generations of scientists, which will provide creative and new solutions in the near future.

Details:  https://www.scienceevents.co.nz/iufro2024/


2022-04-05

7th IUFRO International Workshop on the Genetics of Tree-Parasite Interactions in Forestry Understanding forest tree-antagonistic interactions in a changing world

Pontevedra, Galicia, Spain; NEW DATE: 12-17 September 2022!
Units involved: 7.03.11, 2.02.15, 2.02.20, 7.02.05, 7.02.09, IUFRO Task Force on Forests and Biological Invasions.

Managed and natural forests provide essential ecosystem services worldwide. Due to the free of movement of people and goods across biogeographical zones, tree species are increasingly challenged by emergent invasive biotic threats. We can see large range expansions of pests and diseases, as well assudden shiftsto naïve hostspecies. Moreover, climate change is also increasingabiotic tree stresses, which synergistically interact with tree resistance leading to negative effects on tree survival and forest resilience. Although forest tree species are known to harbour high levels of genetic variation, most remain fairly unstudied, particularly in traits related to host tolerance and resistance to biotic and abiotic stressors.To understand such variations, within the framework of the genetics of tree-antagonist interactions, is necessary to forecast the survival and prevalence of forest populations in a changing environment. This knowledge can also be exploited in breeding programs aiming to improve forest health. The scientific community is pushing for an urgent multidisciplinary and coordinated effort to solve these challenges, making use of current and new knowledge, strategies and technologies. Geneticists, evolutionary biologists, ecologists, phytopathologists, entomologists, plant physiologists, breeders and managers are all involved in this challenge. This workshop will provide the ideal forum for updating knowledge, evidences, solutions and failures between scientific, academic and practical approaches. It is also an opportunity to enhance the dialogue of long experienced expertise with the newgenerations of scientists, which will provide creative and new solutions in the near future.

Detailshttps://www.iufro.org/fileadmin/material/science/divisions/div2/20215/pontevedra20-2nd-announcement.pdf


2020-11-23

Hot off the press: A framework to evaluate climate effects on forest tree diseases

Hennon, PE, Frankel, SJ, Woods, AJ, et al. A framework to evaluate climate effects on forest tree diseases. Forest Pathology. 2020; 00:e12649. https://onlinelibrary.wiley.com/doi/abs/10.1111/efp.12649 
 
A conceptual framework for evaluation of climate effects on tree diseases is presented. Climate can exacerbate tree diseases by favouring pathogen biology, including reproduction and infection processes. Climatic conditions can also cause abiotic disease—direct stress or mortality when trees’ physiological limits are exceeded. When stress is sublethal, weakened trees may subsequently be killed by secondary organisms. To demonstrate climate's involvement in disease, associations between climatic conditions and disease expression provide the primary evidence of atmospheric involvement because experimentation is often impractical for mature trees. This framework tests spatial and temporal relationships of climate and disease at several scales to document climate effects, if any. The presence and absence of the disease can be contrasted with climate data and models at geographic scales: stand, regional and species range. Temporal variation in weather, climate and climate change is examined during onset, development and remission of the disease. Predisposing factors such as site and stand conditions can modify the climate effects of some diseases, especially at finer spatial scales. Spatially explicit climate models that display temperature and precipitation or derivative models such as snow and drought stress provide useful data, and however, information on disease extent at different spatial scales and monitoring through time are often incomplete. The framework can be used to overcome limitations in other disease causality approaches, such as Koch's postulates, and allow for the integration of vegetation, pathogen and environmental data into causality determinations.

2019-04-02

9th Meeting of the IUFRO Working Party 7.02.09: Phytophthora in Forests and Natural Ecosystems

La Maddalena, Sardinia, Italy; 17-25 October 2019.

The 2019 International Union of Forest Research Organizations (IUFRO) Working Party 7.02.09 'Phytophthora Diseases of Forest Trees' conference will be held on La Maddalena Island, Italy, from the 17th to the 25th of October 2019, with the overall aim to bring together scientists and experiences from all over the world, contributing to the progress of knowledge on Phytophthora disease as well as improving and sustaining forest health.

Please note that the abstract submission deadline has been extended to 30 April 2019!

Conference homepage: https://www.iufrosardinia2019.org/


2018-07-11

8th Meeting of the IUFRO Working Party 7.02.09: Book of Abstracts available!

The Book of Abstracts of the Phythophthora conference in Vietnam has been published!

Details:  https://www.iufro.org/science/divisions/division-7/70000/70200/70209/publications/


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