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issue 131 | 28.06.10 | Page 1
Brazil rust fear Eucalypts threatened as authorities group to contain outbreak of fungus
By JIM BOWDEN
PRIVATE and government plant pathologists are concerned that an outbreak of deadly ‘guava rust’ in New South Wales – a serious threat to forest eucalypts – has escaped detection by Australia’s $156 million biosecurity system. A national emergency biosecurity group has quarantined a NSW Central Coast nursery after an outbreak of the disease was detected in April. But the rust may be a slumbering killer that could awaken and spread further in warmer months, say experts. Pathologists were alerted when pollen-hunting bees were attracted to rust spores on the
Sherlock B. Holmes .. native bees uncover rust outbreak while collecting pollen.
leaves of West Australian willow myrtle (Agonis flexuosa) at the nursery. Guava rust (Puccina psidii),
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native to Brazil, is the only fungus known to infect eucalypts. This pathogen has a host range of about 3000 tree and shrub species of which Australian eucalypts (eucalyptus and corymbia), bottlebrush (callistemon) and paperbark (melaleuca) are most susceptible. Eucalypt seedlings, cuttings, young trees and coppiced or damaged mature trees are severely susceptible and could be grossly malformed or even killed. Growth rates are diminished and plantation productivity reduced. Confusion surrounding the identity of the rust by Industry and Investment NSW Cont Page 14
This Issue • Industry impatient on illegal logging report • Conference focuses on global wood markets
poised on glass cliff • FPQ assets sold well under true value • Checking a $10m loss for hardwoods • EWPAA maintains JIS accreditation • Greens dash biomass proposals
Gillard
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issue 131 | 28.06.10 | Page 1