Improved control of TPP with the TPP parasitoid Tamarixia Triozae

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Milestones: May 2019 completed on schedule

Lead Organisation –Market Access Solutions  Project leader Sally Anderson

Objectives – This project will identify effective release strategies of T. triozae in New Zealand using a series of pilot releases adjacent to field crops (potatoes). Multiple releases will then be made around the country to ensure the establishment of T. triozae in New Zealand horticultural environments. The project will evaluate the establishment of T. triozae as a Biological Control Agent (BCA) of TPP in these horticultural environments through post-release monitoring. Information gathered on T. triozae distribution, survival and parasitism rates from these pilot releases will be used to assist growers from all industries to integrate T. triozae into each of their pest management programmes.

Update – The releases by PFR staff Canterbury completed. The target to rear 5,000 Tamarixia was well and truly met, with a total of 6,700 Tamarixia being released over a 4-month period to a number of growers. Post-release survey of ‘non-PFR’ release sites where personnel outside PFR released the parasitic wasp completed. Post-release survey of experimental sites where PFR staff released T. triozae  completed. Key findings: PFR have established that Tamarixia will survive over winter. PFR recovered the parasitic wasp from two sites in Hawke’s Bay and both sites in Canterbury. Where Tamarixia were recovered, percent parasitism ranged between 4 and 40%. Extension activities completed – An article on Tamarixia was published in the February 2019 issue of NZ Grower. Dr Jessica Dohmen-Vereijssen presented an update regarding the release of T. triozae to Australian and New Zealand growers during a field walk in Canterbury, organised by Potatoes NZ, on 13 February 2019.



The goal of this project is to establish self-sustaining populations of the tomato potato psyllid parasitoid Tamarixia, in New Zealand.Since August, Plant & Food Research have carried out a number of releases at multiple sites in the Hawkes’ Bay and Canterbury. The next steps involve collection of TPP infested material from the release sites, to determine whether Tamarixiahave survived the summer. The outcomes of these surveys will be critical to determining the next steps for the release programme.


September 2017 PNZ-07

End of season and post-desiccation management options for tomato
potato psyllid (Bactericera cockerelli) in potato crops in Canterbury
Furlong NJ1, Connolly P2, Vereijssen J1
Plant & Food Research 1 Lincoln, 2 Mt Albert

FINAL REPORT PNZ-07 End-of-season and post-desiccation management options