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The Potential of the Fungicide Phosphite to Control the Autonomous Spread of Phytophthora cinnamomi in Natural and Rehabilitated Ecosystems. Phytophthora cinnamomi is recognised by the Federal Government as a key threatening process to Australia's biodiversity. This project will enhance the existing methodologies and protocols to improve the effectiveness and persistence of phosphite to reduce or contain the autonomous spread of this pathogen through susceptible and threatened plant communities. ....The Potential of the Fungicide Phosphite to Control the Autonomous Spread of Phytophthora cinnamomi in Natural and Rehabilitated Ecosystems. Phytophthora cinnamomi is recognised by the Federal Government as a key threatening process to Australia's biodiversity. This project will enhance the existing methodologies and protocols to improve the effectiveness and persistence of phosphite to reduce or contain the autonomous spread of this pathogen through susceptible and threatened plant communities. It will provide environmental, mining and land-care organisations with improved techniques to control P. cinnamomi in a range of plant communities and environments associated with mining and natural ecosystems.Read moreRead less
Susceptibility to Phytophthora cinnamomi and sensitivity to phosphorus in native Australian plants: why are they linked? Phytophthora cinnamomi is the cause of "Phytophthora dieback", recognised by the Federal Government as a major threat to Australia's biodiversity. This project will enhance our understanding of interactions between species belonging to two iconic Australian plant families (Proteaceae and Myrtaceae) and this serious threat. This understanding will underpin the development of ....Susceptibility to Phytophthora cinnamomi and sensitivity to phosphorus in native Australian plants: why are they linked? Phytophthora cinnamomi is the cause of "Phytophthora dieback", recognised by the Federal Government as a major threat to Australia's biodiversity. This project will enhance our understanding of interactions between species belonging to two iconic Australian plant families (Proteaceae and Myrtaceae) and this serious threat. This understanding will underpin the development of new chemicals to be used in combating the pathogen. In addition, it will provide molecular markers for phosphorus insensitivity and Phytophthora resistance that will be vital for Australia's horticultural industry as well as for the successful rehabilitation of minesites in areas suffering from "Phytophthora dieback". Read moreRead less
Population Genetics of Fungal Pathogens that Threaten the Biosecurity of Australia's Eucalypts. Many new pathogens and diseases are emerging on exotic eucalypt plantations throughout the world. These emerging diseases pose a threat to native eucalypt forests and plantations in Australia. Vigilant quarantine measures are necessary to prevent the introduction of potentially devastating pathogens into Australia. However, incursions do occur and there is a great need to study these pathogens now, ....Population Genetics of Fungal Pathogens that Threaten the Biosecurity of Australia's Eucalypts. Many new pathogens and diseases are emerging on exotic eucalypt plantations throughout the world. These emerging diseases pose a threat to native eucalypt forests and plantations in Australia. Vigilant quarantine measures are necessary to prevent the introduction of potentially devastating pathogens into Australia. However, incursions do occur and there is a great need to study these pathogens now, before they enter Australia. By studying the population genetics of pathogens, their evolutionary potential can be estimated and with that the extent of the risk they pose to native and planted eucalypts in Australia can be determined.Read moreRead less
Saprophytic Ability and Long-term Survival of Phytophthora cinnamomi in Rehabilitated Bauxite Mines and Adjacent Eucalyptus marginata (Jarrah) Forest. The plant pathogen Phytophthora cinnamomi is listed by the Commonwealth as a ?Key threatening process? to Australia's biodiversity. This study will examine the physical, chemical and biological factors that influence long-term survival of P. cinnamomi in a range of jarrah forest and mine site soils, by examining saprophytic ability and endogenous ....Saprophytic Ability and Long-term Survival of Phytophthora cinnamomi in Rehabilitated Bauxite Mines and Adjacent Eucalyptus marginata (Jarrah) Forest. The plant pathogen Phytophthora cinnamomi is listed by the Commonwealth as a ?Key threatening process? to Australia's biodiversity. This study will examine the physical, chemical and biological factors that influence long-term survival of P. cinnamomi in a range of jarrah forest and mine site soils, by examining saprophytic ability and endogenous dormancy. Managers will be provided with better tools for determining the presence and predicting the persistence of P. cinnamomi by obtaining information on the environmental factors that influence survival time in different soils and how to manipulate these to decrease the pathogen's survival.Read moreRead less
Biogenesis of secretory organelles and the function of adhesins secreted during the establishment of plant disease. Many agriculturally important crops and Australian native plants are susceptible to diseases caused by species of Phytophthora, a fungus-like organism that lives in the soil. Economic losses due to Phytophthora diseases are estimated to exceed $200 million per annum and the scale of environmental damage in natural ecosystems is huge. Currently, control of Phytophthora diseases la ....Biogenesis of secretory organelles and the function of adhesins secreted during the establishment of plant disease. Many agriculturally important crops and Australian native plants are susceptible to diseases caused by species of Phytophthora, a fungus-like organism that lives in the soil. Economic losses due to Phytophthora diseases are estimated to exceed $200 million per annum and the scale of environmental damage in natural ecosystems is huge. Currently, control of Phytophthora diseases largely depends on a very small number of effective chemicals and there is an imminent risk of the development of pathogen resistance. This research will increase our understanding of how Phytophthora spores infect host plants and will identify suitable targets for the development of novel, environmentally safe chemicals that inhibit disease development.Read moreRead less
Integrated biological control of Sclerotinia minor root rot of pyrethrum crops. Tasmania is a major global supplier of natural pyrethrum, producing 25% of the world's requirements. However the industry has a major problem with Sclerotinia minor, current chemical treatment being expensive and providing limited effectiveness. The aim of this project is to develop long term integrated control measures for this disease, particularly by the application of biological control agents targeting S. minor ....Integrated biological control of Sclerotinia minor root rot of pyrethrum crops. Tasmania is a major global supplier of natural pyrethrum, producing 25% of the world's requirements. However the industry has a major problem with Sclerotinia minor, current chemical treatment being expensive and providing limited effectiveness. The aim of this project is to develop long term integrated control measures for this disease, particularly by the application of biological control agents targeting S. minor at planting. It will also examine possible break-crops biocidal to the fungus, and other integrated control measures. The significance/outcomes will be improved crop productivity to the industry, improved competitiveness with overseas producers and reduced dependence on chemical pesticides.Read moreRead less
Fungal pathogens threatening the sub-tropical eucalypt plantation industry in Australia. Eucalypt plantations in Australia are at risk from both native pathogens and those that have emerged on exotic eucalypt plantations and been introduced to Australia. Most of the serious pathogens of exotic plantations have emerged in the sub-tropics in climates very similar to those in Queensland. It is not known if these pathogens have already been introduced to Australia; however, increased movement of ger ....Fungal pathogens threatening the sub-tropical eucalypt plantation industry in Australia. Eucalypt plantations in Australia are at risk from both native pathogens and those that have emerged on exotic eucalypt plantations and been introduced to Australia. Most of the serious pathogens of exotic plantations have emerged in the sub-tropics in climates very similar to those in Queensland. It is not known if these pathogens have already been introduced to Australia; however, increased movement of germplasm and forest products increases the risk of introducing new eucalypt pathogens. This project will involve a detailed examination of pathogens present on eucalypts in Queensland. Studies of the diversity of pathogens and determination of their reproductive mode and their pathogenicity will enable for detailed risk assessments. Assessment of genetic trials for disease incidence will provide valuable information for future selections and breeding.Read moreRead less
Simultaneous analysis of root-derived plant defences and the associated microbiome. Australia is dependent on sustainable agricultural yields, which need to be maintained or improved. This production capacity is currently under threat by new and existing diseases which are predicted to worsen with climate change. This project will provide a global picture of how disease resistance and soil microbial communities are causally linked, and provide new strategies for disease control. In doing so, it ....Simultaneous analysis of root-derived plant defences and the associated microbiome. Australia is dependent on sustainable agricultural yields, which need to be maintained or improved. This production capacity is currently under threat by new and existing diseases which are predicted to worsen with climate change. This project will provide a global picture of how disease resistance and soil microbial communities are causally linked, and provide new strategies for disease control. In doing so, it will develop intellectual property (IP) and infrastructure that can be used in soil health management. This will provide many benefits to Australia, including sustainable agriculture in the context of climate variability and an increased demand for food, biomaterials and biofuels.Read moreRead less
Eucalyptus gomphocephela (tuart) decline in Western Australia. The decline and death of tuart forest in Western Australia is spectacular, widespread and a significant threat to biodiversity. There is widespread concern and political pressure because of diverse landuse pressures, yet it remains poorly understood and no remedial action is available. This project will attempt to determine the causes by examining predisposing factors (hydrological, salinity, nutrition, fire) and their interaction wi ....Eucalyptus gomphocephela (tuart) decline in Western Australia. The decline and death of tuart forest in Western Australia is spectacular, widespread and a significant threat to biodiversity. There is widespread concern and political pressure because of diverse landuse pressures, yet it remains poorly understood and no remedial action is available. This project will attempt to determine the causes by examining predisposing factors (hydrological, salinity, nutrition, fire) and their interaction with pests and diseases, and the remedial actions necessary. On the basis of these results, propose an action plan so land managers and community groups can arrest and reverse tuart decline.Read moreRead less
Selective secretion: a novel mechanism of protein trafficking and its role in Phytophthora pathogenicity. Agriculturally important crops and over 3,000 Australian native plants are susceptible to diseases caused by Phytophthora, fungus-like pathogens that live in the soil. Economic losses exceed $200m pa and natural ecosystems are being destroyed on a vast scale. Phytophthora control depends upon a limited number of chemical inhibitors to which resistance has already emerged. New control stra ....Selective secretion: a novel mechanism of protein trafficking and its role in Phytophthora pathogenicity. Agriculturally important crops and over 3,000 Australian native plants are susceptible to diseases caused by Phytophthora, fungus-like pathogens that live in the soil. Economic losses exceed $200m pa and natural ecosystems are being destroyed on a vast scale. Phytophthora control depends upon a limited number of chemical inhibitors to which resistance has already emerged. New control strategies are urgently needed. This research will investigate a novel mechanism for release of infection material recently discovered in Phytophthora cells, and will increase our understanding of how Phytophthora infects host plants, providing vital information required for the development of new, environmentally-safe inhibitors. Read moreRead less