Development of a risk management system for systemic downy mildew of poppies. Development of a risk management system for systemic downy mildew of poppies. This project aims to identify the critical inoculum sources of systemic downy mildew—a new disease threat to the Australian poppy industry, which produces over half the world’s medicinal opiates. It will assess these sources’ relative importance and interaction with agronomic site factors in epidemics; and also intends to understand the syste ....Development of a risk management system for systemic downy mildew of poppies. Development of a risk management system for systemic downy mildew of poppies. This project aims to identify the critical inoculum sources of systemic downy mildew—a new disease threat to the Australian poppy industry, which produces over half the world’s medicinal opiates. It will assess these sources’ relative importance and interaction with agronomic site factors in epidemics; and also intends to understand the systemic progression in planta, an area poorly understood in all downy mildew pathosystems. The project expects the data will form the basis of a disease risk index tool to educate growers and guide disease management strategies essential to this industry’s long term viability.Read moreRead less
Generating broad and stable resistance to gemini- and nanoviruses. The ssDNA geminiviruses and nanoviruses are considered a major threat to crop production in the tropics and subtropics. There are currently no effective control strategies for these viruses. We have been developing a novel transgenic strategy for generating resistance to ssDNA viruses based on the activation of a suicide gene in the presence of the viral Rep protein. Importantly, we have demonstrated proof-of-principle using Toba ....Generating broad and stable resistance to gemini- and nanoviruses. The ssDNA geminiviruses and nanoviruses are considered a major threat to crop production in the tropics and subtropics. There are currently no effective control strategies for these viruses. We have been developing a novel transgenic strategy for generating resistance to ssDNA viruses based on the activation of a suicide gene in the presence of the viral Rep protein. Importantly, we have demonstrated proof-of-principle using Tobacco yellow dwarf mastrevirus. In this project, we aim to further develop this strategy into a broad and stable mechanism for generating resistance to all known geminiviruses and nanoviruses.Read moreRead less
Control of foliar diseases in horticulture using milk components: widening applicability through understanding mechanisms. Fungal diseases, such as powdery mildew and botrytis grey mould, have the potential to cause considerable losses in horticultural crops. Chemical fungicides, some of which are broad-spectrum biocides potentially harmful to human health, are applied routinely in disease management. Milk and whey, which can damage powdery mildew fungi, offer alternatives to conventional fungic ....Control of foliar diseases in horticulture using milk components: widening applicability through understanding mechanisms. Fungal diseases, such as powdery mildew and botrytis grey mould, have the potential to cause considerable losses in horticultural crops. Chemical fungicides, some of which are broad-spectrum biocides potentially harmful to human health, are applied routinely in disease management. Milk and whey, which can damage powdery mildew fungi, offer alternatives to conventional fungicides. Identification of the components of milk which damage fungi, and their mechanisms of activity, will facilitate the development of environmentally sustainable strategies for management of fungal diseases in Australian horticulture. This will have particular benefits for personnel who regularly apply fungicides in glasshouses.Read moreRead less
Compost extract: a new paradigm for disease management in sustainable horticulture. There is significant legislative and consumer pressure worldwide to reduce the amount of pesticide applied to food crops. Compost extract is a watery extract of mature compost that when applied to a crop canopy allows simultaneous suppression of a broad range of plant diseases while maintaining biodiversity in an agricultural ecosystem. This technology represents a paradigm shift from the monoculture approach o ....Compost extract: a new paradigm for disease management in sustainable horticulture. There is significant legislative and consumer pressure worldwide to reduce the amount of pesticide applied to food crops. Compost extract is a watery extract of mature compost that when applied to a crop canopy allows simultaneous suppression of a broad range of plant diseases while maintaining biodiversity in an agricultural ecosystem. This technology represents a paradigm shift from the monoculture approach of single-target fungicides or biological control agents. Scientific evaluation has been hampered by a lack of standard production techniques. Our aim is to identify and characterise compost extract technology that produces known and consistently high levels of effectiveness and safety.Read moreRead less
The role of phytotoxins in ray blight disease of pyrethrum and significance of toxin tolerance to disease resistance. Ray blight disease, caused by Phoma ligulicola, is the greatest threat to the Australian pyrethrum industry causing $2.0M in annual losses. We aim to clarify the pathology of P.ligulicola in pyrethrum, focussing on the role of fungal toxins during infection. Toxin importance in disease will be determined through histology and induction of toxin- pathogen mutants. Toxins will be ....The role of phytotoxins in ray blight disease of pyrethrum and significance of toxin tolerance to disease resistance. Ray blight disease, caused by Phoma ligulicola, is the greatest threat to the Australian pyrethrum industry causing $2.0M in annual losses. We aim to clarify the pathology of P.ligulicola in pyrethrum, focussing on the role of fungal toxins during infection. Toxin importance in disease will be determined through histology and induction of toxin- pathogen mutants. Toxins will be characterised and used in tissue culture to select obtain toxin tolerant pyrethrum clones that will be evaluated for agronomic performance and disease resistance. Successful development of resistant clones will decrease production costs, minimise risk of fungicide resistance development and reduce environmental pollution.Read moreRead less
Manipulation of apoptosis-related genes to generate novel disease resistances in banana. Bananas are one of Australia's most important fruit crops. However, the industry is continually threatened by numerous diseases including yellow and black Sigatoka, Fusarium wilt and bunchy top. Control of these diseases currently requires either extensive pesticide treatments or complex agronomic procedures, of which most are ineffective, expensive or environmentally damaging. The aim of this project is to ....Manipulation of apoptosis-related genes to generate novel disease resistances in banana. Bananas are one of Australia's most important fruit crops. However, the industry is continually threatened by numerous diseases including yellow and black Sigatoka, Fusarium wilt and bunchy top. Control of these diseases currently requires either extensive pesticide treatments or complex agronomic procedures, of which most are ineffective, expensive or environmentally damaging. The aim of this project is to utilise a novel strategy to generate transgenic bananas with resistance to these diseases. The benefit will be both economic and environmental as implementation should significantly reduce or eliminate pesticide use. Importantly, this strategy can potentially be extrapolated to many other crops.Read moreRead less
Domestication of blue-banded bees for greenhouse pollination. The tomato industry is currently shifting towards production in greenhouses, which allows climate control and improved pest management. A lack of pollinators is an obstacle to this move. This project will establish protocols for large-scale use of native blue-banded bees as pollinators in greenhouses, especially for tomatoes. Pollination by native bees increases fruit weight by 15%, comparable to the effects of bumblebees used overs ....Domestication of blue-banded bees for greenhouse pollination. The tomato industry is currently shifting towards production in greenhouses, which allows climate control and improved pest management. A lack of pollinators is an obstacle to this move. This project will establish protocols for large-scale use of native blue-banded bees as pollinators in greenhouses, especially for tomatoes. Pollination by native bees increases fruit weight by 15%, comparable to the effects of bumblebees used overseas. Significant economic, environmental and health benefits are expected from this project. The outcome will satisfy an industry need and remove an environmental threat by finding indigenous substitutes for alien bumblebees.Read moreRead less
Improved olive productivity and the use of molecular markers. Sales of olive oil on international markets are growing at 15% per year, and the Australian industry is expanding rapidly to win some of this trade. Varietal identity is a major problem, which has production implications and this project will verify trueness-to type via genetic fingerprinting. Many olive cultivars require cross pollination for optimal production, and the research will identify compatible cultivars for the major variet ....Improved olive productivity and the use of molecular markers. Sales of olive oil on international markets are growing at 15% per year, and the Australian industry is expanding rapidly to win some of this trade. Varietal identity is a major problem, which has production implications and this project will verify trueness-to type via genetic fingerprinting. Many olive cultivars require cross pollination for optimal production, and the research will identify compatible cultivars for the major varieties. Molecular markers will be developed to accelerate the selection of improved varieties with self-fertility, high oleic acid, low linolenic acid and tolerance to Peacock spot disease.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
Meeting the challenges of Sclerotinia crown rot in a perennial production system - pyrethrum. The Australian pyrethrum industry has undergone rapid growth in the last decade, which has seen it become the second largest producer of natural insecticidal pyrethrins in the world. Current production supplies 60% of the global market, with further expansion planned. Sclerotinia crown rot is a major disease that results in plant death; reducing yields and the life of the perennial crop. This project ....Meeting the challenges of Sclerotinia crown rot in a perennial production system - pyrethrum. The Australian pyrethrum industry has undergone rapid growth in the last decade, which has seen it become the second largest producer of natural insecticidal pyrethrins in the world. Current production supplies 60% of the global market, with further expansion planned. Sclerotinia crown rot is a major disease that results in plant death; reducing yields and the life of the perennial crop. This project aims to develop more cost effective and environmentally sustainable methods of managing this disease. This will help to ensure consistent supply of pyrethrin to the world market, reduce the costs of production and increase the net return to growers.Read moreRead less