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

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Mar 17, 2023 313 likes •447 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

SLIDE 1

Tamarixia triozae

A biological control agent of Tomato Potato Psyllid Dr Stephen Ogden Market Access Solutionz Ltd

SLIDE 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

SLIDE 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

SLIDE 4

Tomato Potato Psyllid (TPP)

Psyllid adult

Laid on stalks, leaf margins
7 days to hatch

J Munyaneza, USDA J Clark, Univ. Calif W Stepman, BCP Ltd J Munyaneza, USDA

Psyllid eggs

Psyllid nymph

3-4mm long
Light yellow when emerge, 2-3 days brown or green
Adults banded grey or black/white
Phloem feeding

Lifecycle 15-30 days, 3-5 generations on potato

SLIDE 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

SLIDE 6

Photo (& top right) courtesy of J Anderson

SLIDE 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)

SLIDE 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

SLIDE 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
f TPP

Photo: Plant & Food Research Photo: hydro-gardens.com

SLIDE 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

SLIDE 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”

SLIDE 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)