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Linking environmental stress in pine plantations to bark stripping by browsers and fungal attack: developing novel options for management. The Australian forest industry, under the pressure of certification requirements, is moving towards a more integrated, reduced chemical, environmentally sustainable approach to protecting forest. Novel insights into the stress biology of pine will provide valuable information that will underpin efforts to reduce risk e.g. the matching of specific genotypes to ....Linking environmental stress in pine plantations to bark stripping by browsers and fungal attack: developing novel options for management. The Australian forest industry, under the pressure of certification requirements, is moving towards a more integrated, reduced chemical, environmentally sustainable approach to protecting forest. Novel insights into the stress biology of pine will provide valuable information that will underpin efforts to reduce risk e.g. the matching of specific genotypes to site so that pest resistance can be maintained even under environmental stress conditions. By understanding the 'attraction' factor of stressed pine to wallabies we will develop and test an urgently and nationally required diversionary feed for this browser. Lethal control involving poison is becoming increasingly restricted.Read moreRead less
The Biology, Ecology, Pathology and Control of Mycosphaerella Leaf Blights in Australian Eucalypt Plantations. Leaf spot diseases, caused by Mycosphaerella, have become widespread in over 150,000 ha of Eucalyptus globulus (blue gum) plantations in Western Australia, causing severe reduction in canopy area of young trees. This project will research the epidemiology of these diseases by studying the life cycles of the key pathogenic Mycosphaerella species identified in a previous project, modes an ....The Biology, Ecology, Pathology and Control of Mycosphaerella Leaf Blights in Australian Eucalypt Plantations. Leaf spot diseases, caused by Mycosphaerella, have become widespread in over 150,000 ha of Eucalyptus globulus (blue gum) plantations in Western Australia, causing severe reduction in canopy area of young trees. This project will research the epidemiology of these diseases by studying the life cycles of the key pathogenic Mycosphaerella species identified in a previous project, modes and timing of spore dispersal, the infection process, and host specificity. The economic impact of leaf spot diseases will be assessed from large exclusion trials. A predictive integrated management package for Mycosphaerella foliar diseases will be formulated and evaluated to minimising disease impact.Read moreRead less
The cause of basal stem rot in second rotation Eucalyptus globulus plantations. The Eucalyptus globulus plantation industry consists of over 300000 ha in Australia and is worth 1 billion dollars. The industry has expanded rapidly since the mid 1980's and now many crops are in their second rotation. Recently, poor coppice growth in second rotation crops as a result of fungal basal rot or decay, has started to become a significant management problem to the industry. This project will determine th ....The cause of basal stem rot in second rotation Eucalyptus globulus plantations. The Eucalyptus globulus plantation industry consists of over 300000 ha in Australia and is worth 1 billion dollars. The industry has expanded rapidly since the mid 1980's and now many crops are in their second rotation. Recently, poor coppice growth in second rotation crops as a result of fungal basal rot or decay, has started to become a significant management problem to the industry. This project will determine the cause(s) of basal stem rot/decay and develop management strategies to reduce the impact of the problem.Read moreRead less
Pathogenicity of Mycosphaerella on Eucalyptus globulus plantations in Western Australia. Eucalyptus globulus is the main hardwood species grown in plantations in Western Australia. In recent years, the incidence of foliar damage caused by leaf spot fungi in the genus Mycosphaerella has started to become a worrying management problem for the industry. There are approximately 12 Mycosphaerella species associated with Eucalyptus globulus in Western Australia. This project will determine which are t ....Pathogenicity of Mycosphaerella on Eucalyptus globulus plantations in Western Australia. Eucalyptus globulus is the main hardwood species grown in plantations in Western Australia. In recent years, the incidence of foliar damage caused by leaf spot fungi in the genus Mycosphaerella has started to become a worrying management problem for the industry. There are approximately 12 Mycosphaerella species associated with Eucalyptus globulus in Western Australia. This project will determine which are the priority destructive Mycosphaerella species. The information gained will allow researchers to select and breed eucalypts for resistance of target Mycosphaerella species in the future. The project will also develop methods for rapid pathogenicity screening.Read moreRead less
Enhancing natural enemy mortality of chrysomelids in young eucalypt plantations through habitat manipulation. Eucalyptus plantations are the future of Australian forestry. In eucalypt plantations leaf-feeding beetles reduce tree growth by an average of 53%, substantially reducing profits. Sustainable management of these pests is best done by maximising the impact of native beneficial agents, eg wasps and spiders. This research will quantify the beneficial insects in plantations and increase ....Enhancing natural enemy mortality of chrysomelids in young eucalypt plantations through habitat manipulation. Eucalyptus plantations are the future of Australian forestry. In eucalypt plantations leaf-feeding beetles reduce tree growth by an average of 53%, substantially reducing profits. Sustainable management of these pests is best done by maximising the impact of native beneficial agents, eg wasps and spiders. This research will quantify the beneficial insects in plantations and increase their efficacy by manipulating the plantation environment so it provides more of the resources (food & shelter) these beneficials require. This approach is significant as it has not been previously attempted in forestry. Our management recommendations will make the plantation sector more profitable and sustainable.Read moreRead less
Risk, impact on productivity and control of Mycosphaerella infections in plantations in plantations of E. nitens and E. globulus. Mycosphaerella, a defoliating fungal pathogen of eucalypts, has the potential to change markedly the economics of plantation development. This research will explore the fundamental physiological and pathological processes associated with the disease, link these findings into established process-based models of forest plantation growth for predictive purposes and util ....Risk, impact on productivity and control of Mycosphaerella infections in plantations in plantations of E. nitens and E. globulus. Mycosphaerella, a defoliating fungal pathogen of eucalypts, has the potential to change markedly the economics of plantation development. This research will explore the fundamental physiological and pathological processes associated with the disease, link these findings into established process-based models of forest plantation growth for predictive purposes and utilise hyperspectral remote sensing techniques to scale impact from the tree to plantation level. In doing this research not only are questions of key importance to an important and growing industry sector addressed, but an innovative approach to disease impact assessment established and a skills base and methodology widely applicable to other tree and agricultural disease problems established.Read moreRead less
Determining generic indicators of stress in eucalypt leaves for application to the remote sensing of canopy condition and productivity modelling. Biotic and abiotic stresses induce generic alterations of leaf chemistry (e.g. chlorophyll, anthocyanins). We will explore the behaviour of eucalypt leaf reflectance to changes in leaf cellular chemistry and structure arising from exposure to a range of stressful factors. We will relate leaf reflectance to physiological processes using a research radia ....Determining generic indicators of stress in eucalypt leaves for application to the remote sensing of canopy condition and productivity modelling. Biotic and abiotic stresses induce generic alterations of leaf chemistry (e.g. chlorophyll, anthocyanins). We will explore the behaviour of eucalypt leaf reflectance to changes in leaf cellular chemistry and structure arising from exposure to a range of stressful factors. We will relate leaf reflectance to physiological processes using a research radiation interception model. We will report on a) the potential integration of data related to stress, into process-based models for eucalypt plantation growth and b) the exploitation of generic reflectance indicators of stress in the remote acquisition of high resolution multispectral imagery with potential to spatially quantify plantation eucalypt health.Read moreRead less
Pest Status and Management of a Creiss psyllid in Eucalyptus plantations. Research studies are required on the ecology and epidemiology of a Creiis psyllid, recently found causing significant damage in young Eucalyptus dunnii plantations. The susceptibility to psyllid damage to a range of selected clonal types will be examined. With increasing community concerns associated with insecticide usage and to reduce costs, exploitation of natural resistance is an avenue that counters economic threat f ....Pest Status and Management of a Creiss psyllid in Eucalyptus plantations. Research studies are required on the ecology and epidemiology of a Creiis psyllid, recently found causing significant damage in young Eucalyptus dunnii plantations. The susceptibility to psyllid damage to a range of selected clonal types will be examined. With increasing community concerns associated with insecticide usage and to reduce costs, exploitation of natural resistance is an avenue that counters economic threat from herbivorous insects. Since Australia is currently planting 100,000 ha of eucalypts per year results from this project are essential to build better management strategies for reduce the impact of this and all pests on tree survival and growth.Read moreRead less
Biosecurity of Australia's eucalypts at risk from exotic diseases present in the Asian region. Biosecurity of Australia's flora and fauna is a National Research Priority, however currently there are no projects in Australia dealing with the threats and risks of exotic diseases to Australian native forests and hardwood plantations and consequently our proposed project is unique. It is through years of networking and collaboration that such a project is possible within our group. The network of sc ....Biosecurity of Australia's eucalypts at risk from exotic diseases present in the Asian region. Biosecurity of Australia's flora and fauna is a National Research Priority, however currently there are no projects in Australia dealing with the threats and risks of exotic diseases to Australian native forests and hardwood plantations and consequently our proposed project is unique. It is through years of networking and collaboration that such a project is possible within our group. The network of scientists put together in this project, both in Australia and Asia, results in a team of trained scientists studying and estimating the risk of existing disease threats and being vigilant for new disease threats. Read moreRead less
Info-chemicals for the environmentally sustainable management of autumn gum moth and scarab beetle pests of bluegum plantations. Insect pest control in Australian bluegum plantations currently relies on insecticides. Insecticides are incompatible with maintaining populations of native beneficial insects and achieving biotic regulation of pest populations. Info-chemicals offer ways of disrupting pest populations that are benign to beneficials because they only interfere with the responses of the ....Info-chemicals for the environmentally sustainable management of autumn gum moth and scarab beetle pests of bluegum plantations. Insect pest control in Australian bluegum plantations currently relies on insecticides. Insecticides are incompatible with maintaining populations of native beneficial insects and achieving biotic regulation of pest populations. Info-chemicals offer ways of disrupting pest populations that are benign to beneficials because they only interfere with the responses of the target insect. This project will pioneer the development of sex pheromone-based technologies for managing autumn gum moth and reveal potential applications of info-chemicals for managing scarab beetles. Application of info-chemical solutions to plantation pests will improve public perception of the industry and assist with forestry standard certification.Read moreRead less