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Threat Specific Contingency Plan - Plant Health …-crown and paw

INDUSTRY BIOSECURITY PLAN
FOR THE PAPAYA INDUSTRY
Threat Specific Contingency Plan
Bacterial Crown Rot
Erwinia papayae
Prepared by Lynton Vawdrey
and Plant Health Australia
July 2011
Disclaimer
The scientific and technical content of this document is current to the date published and all efforts
were made to obtain relevant and published information on the pest. New information will be included
as it becomes available, or when the document is reviewed. The material contained in this publication
is produced for general information only. It is not intended as professional advice on any particular
matter. No person should act or fail to act on the basis of any material contained in this publication
without first obtaining specific, independent professional advice. Plant Health Australia and all
persons acting for Plant Health Australia in preparing this publication, expressly disclaim all and any
liability to any persons in respect of anything done by any such person in reliance, whether in whole
or in part, on this publication. The views expressed in this publication are not necessarily those of
Plant Health Australia.
Further information
For further information regarding this contingency plan, contact Plant Health Australia through the
details below.
Address: Suite 1, 1 Phipps Close
DEAKIN ACT 2600
Phone: +61 2 6215 7700
Fax: +61 2 6260 4321
Email: biosecurity@phau.com.au
Website: www.planthealthaustralia.com.au
PLANT HEALTH AUSTRALIA | Contingency Plan - Bacterial crown rot of papaya
1 Purpose of this Contingency Plan .............................................................................................. 5
2 Pest information/status ............................................................................................................... 5
2.1 Pest details ............................................................................................................................ 5
2.1.1 General information......................................................................................................... 5
2.1.2 Disease cycle .................................................................................................................. 5
2.2 Affected hosts ........................................................................................................................ 7
2.2.1 Host range ....................................................................................................................... 7
2.2.2 Geographic distribution ................................................................................................... 8
2.2.3 Symptoms ....................................................................................................................... 8
2.3 Pest risk ratings and potential impacts .................................................................................. 9
2.3.1 Entry potential ................................................................................................................. 9
2.3.2 Establishment potential ................................................................................................... 9
2.3.3 Spread potential ............................................................................................................ 10
2.3.4 Economic impact ........................................................................................................... 10
2.3.5 Environmental impact.................................................................................................... 10
2.3.6 Overall risk .................................................................................................................... 10
2.4 Diagnostic information ......................................................................................................... 11
2.4.1 Characteristics of Erwinia papayae............................................................................... 11
2.4.2 Diagnostic protocol........................................................................................................ 11
2.5 Response checklist.............................................................................................................. 12
2.6 Delimiting survey and epidemiology study .......................................................................... 12
2.6.1 Sampling method .......................................................................................................... 12
2.6.2 Epidemiological study ................................................................................................... 14
2.6.3 Models of spread potential ............................................................................................ 15
2.6.4 Pest Free Area guidelines ............................................................................................. 15
2.7 Availability of control methods ............................................................................................. 15
2.7.1 General procedures for control ..................................................................................... 15
2.7.2 Control if small areas are affected ................................................................................ 15
2.7.3 Control if large areas are affected................................................................................. 15
2.7.4 Specific controls for E. papayae.................................................................................... 16
3 Course of action - eradication methods.................................................................................. 17
3.1 Destruction strategy............................................................................................................. 17
3.1.1 Destruction protocols .................................................................................................... 17
3.1.2 Decontamination protocols............................................................................................ 18
3.1.3 Priorities ........................................................................................................................ 18
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