biosecurity built on science Exploiting Hydrogen and Oxygen as Components of a Natal Origin Biogeochemical Marker is Challenging but Promising (PBCRC2111) Karen Armstrong & Peter Holder (BPRC) David Murphy & Karine Harumi Moromizato (QUT) Peter Crisp (SARDI) Bill Woods (DAFWA) Solomon Balagawi (NSW DPI) with Robert Van Hale & Dianne Clarke (Univ. Otago) Plant Biosecurity Cooperative Research Centre
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Session 5: Exploiting hydrogen and oxygen as components of a natal origin biogeochemical marker is challenging but promising
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biosecurity built on science
Exploiting Hydrogen and Oxygen as Components of a Natal Origin Biogeochemical Marker is Challenging but Promising
• Developing a multivariate systems ‘model’ for end user application
Promises
• Technology to analyse single insects rapidly is possible
• Number of insects needed is low
• We understand the δ2H & δ18O signature food-to-fly transmission
• Wild fly regional differences can be greater than any seasonal or host variation
biosecurity built on science
The End-User Advocate’s perspective
Various uses for knowledge of natal origins:- declarations of area freedom- indicator of regions generating infested produce- understand local pathway risk – landscape use, preferred sites & travel
corridors
Ultimate end users/beneficiaries:- horticultural industries susceptible to fruit fly- inter-state quarantine (regulators and risk managers)- funding providers for regulatory activities, funding bodies for better
targeted research for international market access
Climate change - Qfly range expanding so NZ, Tasmania and South Australia under
increasing pressure to maintain area freedom = intensified interest in evidence for source of a breach.