Western Australia completes Autumn TPP surveillance and testing for CLso bacteria
The Western Australian Department of Primary Industries and Regional Development has wrapped up autumn surveillance for the Tomato potato psyllid (TPP), with no detections of the Candidatus Liberibacter solanacearum (CLso) bacterium.
The significant surveillance campaign concludes the third round of surveillance in WA since TPP was first detected in February 2017.
Central to surveillance activities was testing TPP to confirm the presence or absence of CLso, a damaging plant bacterium which has been associated with this pest in other parts of the world and causes Zebra Chip disease in potato.
2,280 TPP were tested for CLso during the autumn campaign, with no detections of the bacteria.
The total number of TPP tested across three rounds of surveillance was more than 10 000, and will assist in providing a high level of confidence of WA’s proof of absence of CLso.
Surveillance and testing is complete – what happens next?
For market access to be considered by other states, Western Australia was required to complete TPP surveillance and testing for CLso over a period of three seasons to ensure a high level of confidence in the results.
WA will present these results to the Consultative Committee on Emergency Plant Pests (CCEPP), and is working with government and industry partners as a priority to assist the assessment and recognition process for proof of absence of CLso.
WA community shows support
Surveillance was undertaken as part of the nationally-agreed Transition to management plan, and targeted known populations of TPP across the Perth metropolitan area and surrounds.
The WA community once again rallied to support autumn surveillance efforts, with 430 residents volunteering to host sticky traps in their gardens to help capture TPP and meet surveillance targets.
WA Quarantine Area reminder
A Quarantine Area is currently in place to direct the movement and treatment of TPP host plants within Western Australia.
The Quarantine Area includes the Perth metropolitan area and a number of surrounding local government areas.
Prescribed treatment is required for host plants, such as seedlings or nursery stock, where they are moving from the Quarantine Area to ‘specified local government areas’ in WA.
Growers should be familiar with the prescribed treatments outlined in the Quarantine Area Notice. Additional treatment options are also provided in the ‘Approved manner of preparation for movement from the TPP Quarantine Area’.
For full details including the published Quarantine Area Notice, additional treatment options and a list of areas in the Quarantine Area and specified local government areas, please visit www.agric.wa.gov.au/tpp/tpp-quarantine-area
TPP pre-harvest control options
Growers are reminded there are a number of pre-harvest control options currently available to assist with the management of TPP.
Permits from the Australian Pesticides and Veterinary Medicines Authority (APVMA) have been made available for use in host crops and nursery stock.
Download permits at
APVMA permits search portal
Growers have a responsibility to ensure chemicals are used according to the label/permit instructions.
Check and report
Commercial growers are encouraged to check for, and report sightings of unusual insects or damage to their plants through the MyPestGuide reporter app.
Good farm biosecurity procedures should be in place to prevent the entry, establishment and spread of pests and diseases. More information on biosecurity is available at the Farm Biosecurity website www.farmbiosecurity.com.au
Contacts for growers
Phone: 08 9486 7515
Potato Growers Association of WA
Phone: (08) 9481 0834
Nursery and Garden Industry Western Australia
Matthew Lunn, Chief Executive Officer
Phone: 0410 714 207
Department of Primary Industries and Regional Development
Ian Wilkinson, TPP Project Manager
Phone: 08 9780 6278