BRIEFING DOCUMENT ON MYRTLE RUST, A MEMBER OF THE GUAVA RUST COMPLEX, AND THE RISK TO NEW ZEALAND

1 An introduction to rust diseases 1 Summary – rust life cycle 3 Uredo rangelii – what is it? 4 Hosts of Uredo rangelii (May 2010) 4 Relationship of Uredo rangelii with Uredo psidii 4 Variation within Puccinia psidii 4 Summary – U. rangelii 5 Probability of introduction 6 Rust biology 6 Long distance dispersal 6 Summary Probability of introduction 7 Potential distribution in New Zealand 8 Background 8 CLIMEX Compare Locations and Match Regions 8 CLIMEX Compare Locations 8 CLIMEX Match Regions 9 NAPPFAST 9 Summary potential distribution 10 Potential hosts in New Zealand 11 Potential impact in New Zealand 12 Australian Response 13 Initial Detection 13 Initial Response 13 Responsibilities 13 Domestic quarantine and ongoing response 14 Recommendations 15 References 15