tamarixia triozae
play

Tamarixia triozae A biological control agent of Tomato Potato - PowerPoint PPT Presentation

Mar 17, 2023 •313 likes •445 views

Tamarixia triozae A biological control agent of Tomato Potato Psyllid Dr Stephen Ogden Market Access Solutionz Ltd Application to release Tamarixia triozae Why we are applying to release T. triozae TPP the problem Researching the

  1. Tamarixia triozae A biological control agent of Tomato Potato Psyllid Dr Stephen Ogden Market Access Solutionz Ltd

  2. Application to release Tamarixia triozae  Why we are applying to release T. triozae  TPP – the problem  Researching the solutions  Why is Tamarixia needed?  How will Tamarixia be used?  Industry group perspectives  Response to submissions  Technical experts

  3. TPP – the problem  TPP – Bactericera cockerelli  Detected in 2006 in a tomato greenhouse  Yellowing and curling of leaves  Psyllid yellows  Found to be widespread – not eradicated  TPP known to cause “Zebra chip” in potatoes in USA – but not why

  4. Tomato Potato Psyllid (TPP) - Laid on stalks, leaf margins - 7 days to hatch J Clark, Univ. Calif Psyllid eggs W Stepman, BCP Ltd J Munyaneza, USDA Lifecycle 15-30 days, Psyllid nymph 3-5 generations on potato - 3-4mm long - Light yellow when emerge, 2-3 days brown or green - Adults banded grey or black/white - Phloem feeding J Munyaneza, USDA Psyllid adult

  5. Candidatus Liberibacter solanacearum  Identified from NZ tomato crops in 2008  New to science – not previously identified  Bacterium spread by TPP  Develops in phloem & psyllid  Interferes with transport of sugars into potato tubers  Leaf yellowing, curling, death  Zebra chip in potato tubers  IPM programmes lost – reversion to calendar spraying

  6. Photo (& top right) courtesy of J Anderson

  7. Researching solutions  Sustainable psyllid management (2009-12)  $990,000 (SFF and Industry)  IPM tools for psyllid management in potatoes (2011-14)  $274,000 (SFF and industry)  Assessing the potential for the psyllid parasitoid Tamarixia triozae to establish in New Zealand (2012)  $25,500 (SFF and industry)

  8. Researching solutions  Plant & Food Research MBIE (2013 – 2019) $6,665,400  Sensory cues  Pheromone products  Improved monitoring tools and control  Population genetics  Seasonal and/or regional psyllid/Lso risk prediction  Insecticide resistance  Plant host responses to Lso and psyllid  Molecular and analytical markers  Resistant cultivars

  9. Tamarixia triozae  A small parasitic wasp 2-3 mm in length  Eggs laid under the psyllid larvae  T. triozae develop as an external parasitoid beneath the body of TPP Photo: Plant & Food Research Photo: hydro-gardens.com

  10. Why do we want T. triozae  Part of an IPM programme  Complements existing BCAs  Reduces pest pressure in and around crops  Reduces overwintering potential  Fits with use of newer, specific, agrichemicals  Reduces use of agrichemicals  Improved pest control outcomes

  11. Release and use of T. triozae  Released as part of a research programme  PFR to import and rear  Release and monitoring of parasitism rates, rate of spread  Three year programme  Intends to “get it right”  Make available to growers in all regions  MPI SFF project subject to EPA release approval  “Improved control of tomato potato psyllid with the psyllid parasitoid Tamarixia triozae ”

  12. Applicant presentation  Industry group representatives  Potatoes NZ  Tomatoes NZ  Heinz Wattie’s NZ Ltd  Vegetables NZ  Tamarillo Growers Association Inc  Response to submitters  Sally Anderson  John Charles (Plant & Food Research)  Chris Nixon (NZIER)

More recommend