Cell-free immune reactions and suppression. Insects pests and insect vectors of diseases are managed by toxic substances, but insects have a cunning ability to persist. How pesticide-tolerant insect pests recognise and inactivate chemical and biological toxins is poorly understood. While vertebrates with a closed circulatory system use coagulation reactions mainly for wound-healing, invertebrates employ cell-free aggregation reactions for the sequestration and inactivation of potentially damagin ....Cell-free immune reactions and suppression. Insects pests and insect vectors of diseases are managed by toxic substances, but insects have a cunning ability to persist. How pesticide-tolerant insect pests recognise and inactivate chemical and biological toxins is poorly understood. While vertebrates with a closed circulatory system use coagulation reactions mainly for wound-healing, invertebrates employ cell-free aggregation reactions for the sequestration and inactivation of potentially damaging objects and substances. We use insect plasma to dissect recognition and inactivation of damaging objects and substances with the aim to understand tolerance and its inhibition to design novel strategies in delaying tolerance to pesticides in insect pests.Read moreRead less
Life hanging on a thread; disrupting the structure and function of lepidopteran silking behaviour. The production and use of silk by many invertebrates is vital for their survival. We develop a means of visualising and understanding the role of silking behaviour as a survival mechanism for Helicoverpa larvae (a key world-wide pest) with a view to disrupting silking. This novel project allows us to understand not just where larvae go but what they do along the way. The project outcomes will have ....Life hanging on a thread; disrupting the structure and function of lepidopteran silking behaviour. The production and use of silk by many invertebrates is vital for their survival. We develop a means of visualising and understanding the role of silking behaviour as a survival mechanism for Helicoverpa larvae (a key world-wide pest) with a view to disrupting silking. This novel project allows us to understand not just where larvae go but what they do along the way. The project outcomes will have wide application to the study and control of lepidopteran pests in natural and agricultural ecosystems and is of interest to applied and fundamental projects associated with insect pest control, behaviour and ecology.Read moreRead less
Putting smells into context: Using in vivo technologies to understand plant-insect odour signalling. How insects find host plants is central to understanding their basic ecology and management. We use a novel cross-disciplinary approach to target a key pest insect's responses to a host-plant, genetically modified to smell different. This insect pest, the cotton bollworm, costs the Australian economy millions in lost revenue every year. Reliance on insecticides to control insect pests is exacerba ....Putting smells into context: Using in vivo technologies to understand plant-insect odour signalling. How insects find host plants is central to understanding their basic ecology and management. We use a novel cross-disciplinary approach to target a key pest insect's responses to a host-plant, genetically modified to smell different. This insect pest, the cotton bollworm, costs the Australian economy millions in lost revenue every year. Reliance on insecticides to control insect pests is exacerbated by increasing insecticidal resistance and is a major economic, environmental and health concern. Our research will open the door to novel control strategies that use the natural odours of plants to reduce their attractiveness to insect pests.Read moreRead less
Assessing animal exposure to urticating caterpillar hairs and developing management strategies to reduce the consequence of foetal abortion in mares. Equine Amnionitis and Foetal Loss (EAFL) accounts for about a third of mares aborting in thoroughbred horse studs in southern Queensland, New South Wales and Victoria. Previous studies have shown that processionary caterpillars and their irritating setae (hairs) can cause EAFL. This project aims to determine the likelihood that other caterpillar sp ....Assessing animal exposure to urticating caterpillar hairs and developing management strategies to reduce the consequence of foetal abortion in mares. Equine Amnionitis and Foetal Loss (EAFL) accounts for about a third of mares aborting in thoroughbred horse studs in southern Queensland, New South Wales and Victoria. Previous studies have shown that processionary caterpillars and their irritating setae (hairs) can cause EAFL. This project aims to determine the likelihood that other caterpillar species are involved based on hair morphology and a surrogate model system. A full risk assessment of the exposure of mares to these hairs in situ will be undertaken, based on the ecology and biology of the species. Outcomes include a management strategy for EAFL-causing insects and a reduction of EAFL within the industry.Read moreRead less