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Tamieka Pearce

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Tamieka Pearce

Postdoc Research Fellow

Cradle Coast Campus

+61 3 6430 4522 (phone)

Tamieka.Pearce@utas.edu.au

View more on Dr Tamieka Pearce in WARP

Fields of Research

  • Horticultural crop protection (incl. pests, diseases and weeds) (300804)
  • Plant pathology (310805)
  • Crop and pasture protection (incl. pests, diseases and weeds) (300409)
  • Horticultural crop improvement (incl. selection and breeding) (300803)
  • Horticultural crop growth and development (300802)

Research Objectives

  • Plant extract crops (260606)
  • Horticultural crops (260599)
  • Stone fruit (excl. avocado) (260513)
  • Berry fruit (excl. kiwifruit) (260503)

Publications

Total publications

14

Highlighted publications

(3 outputs)
YearTypeCitationAltmetrics
2019Journal ArticlePearce TL, Scott JB, Pilkington S, Pethybridge SJ, Hay FS, 'Evidence for sexual recombination in Didymella tanaceti populations, and their evolution over spring production in Australian pyrethrum fields', Phytopathology, 109, (1) pp. 155-168. ISSN 0031-949X (2019) [Refereed Article]

DOI: 10.1094/PHYTO-08-17-0280-R [eCite] [Details]

Citations: Scopus - 3Web of Science - 3

Co-authors: Scott JB; Pilkington S; Pethybridge SJ; Hay FS

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2017Journal ArticleScott JB, Gent DH, Pearce TL, Pethybridge SJ, Pilkington SJ, et al., 'Mycoflora associated with pyrethrum seed and the integration of seed steam treatment into foliar disease management strategies', Plant Disease, 101, (11) pp. 1874-1884. ISSN 0191-2917 (2017) [Refereed Article]

DOI: 10.1094/PDIS-03-17-0309-RE [eCite] [Details]

Citations: Scopus - 5Web of Science - 4

Co-authors: Scott JB; Pilkington SJ

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2016Journal ArticlePearce TL, Scott JB, Crous PW, Pethybridge SJ, Hay FS, 'Tan spot of pyrethrum is caused by a Didymella species complex', Plant Pathology, 65, (7) pp. 1170-1184. ISSN 0032-0862 (2016) [Refereed Article]

DOI: 10.1111/ppa.12493 [eCite] [Details]

Citations: Scopus - 17Web of Science - 19

Co-authors: Scott JB

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Journal Article

(8 outputs)
YearCitationAltmetrics
2019Pearce TL, Scott JB, Pilkington S, Pethybridge SJ, Hay FS, 'Evidence for sexual recombination in Didymella tanaceti populations, and their evolution over spring production in Australian pyrethrum fields', Phytopathology, 109, (1) pp. 155-168. ISSN 0031-949X (2019) [Refereed Article]

DOI: 10.1094/PHYTO-08-17-0280-R [eCite] [Details]

Citations: Scopus - 3Web of Science - 3

Co-authors: Scott JB; Pilkington S; Pethybridge SJ; Hay FS

Tweet

2019Pearce TL, Wilson CR, Gent DH, Scott JB, 'Multiple mutations across the succinate dehydrogenase gene complex are associated with boscalid resistance in Didymella tanaceti in pyrethrum', PLoS ONE, 14, (6) Article e0218569. ISSN 1932-6203 (2019) [Refereed Article]

DOI: 10.1371/journal.pone.0218569 [eCite] [Details]

Citations: Scopus - 8Web of Science - 7

Co-authors: Wilson CR; Scott JB

Tweet

2017Scott JB, Gent DH, Pearce TL, Pethybridge SJ, Pilkington SJ, et al., 'Mycoflora associated with pyrethrum seed and the integration of seed steam treatment into foliar disease management strategies', Plant Disease, 101, (11) pp. 1874-1884. ISSN 0191-2917 (2017) [Refereed Article]

DOI: 10.1094/PDIS-03-17-0309-RE [eCite] [Details]

Citations: Scopus - 5Web of Science - 4

Co-authors: Scott JB; Pilkington SJ

Tweet

2016Pearce T, Scott JB, Hay FS, Pethybridge SJ, 'Mating-type gene structure and spatial distribution of Didymella tanaceti in pyrethrum fields', Phytopathology, 106, (12) pp. 1521-1529. ISSN 1943-7684 (2016) [Refereed Article]

DOI: 10.1094/PHYTO-01-16-0038-R [eCite] [Details]

Citations: Scopus - 7Web of Science - 7

Co-authors: Scott JB; Pethybridge SJ

Tweet

2016Pearce TL, Scott JB, Crous PW, Pethybridge SJ, Hay FS, 'Tan spot of pyrethrum is caused by a Didymella species complex', Plant Pathology, 65, (7) pp. 1170-1184. ISSN 0032-0862 (2016) [Refereed Article]

DOI: 10.1111/ppa.12493 [eCite] [Details]

Citations: Scopus - 17Web of Science - 19

Co-authors: Scott JB

Tweet

2015Hay FS, Gent DH, Pilkington SJ, Pearce TL, Scott JB, et al., 'Changes in distribution and frequency of fungi associated with a foliar disease complex of pyrethrum in Australia', Plant Disease, 99, (9) pp. 1227-1235. ISSN 0191-2917 (2015) [Refereed Article]

DOI: 10.1094/PDIS-12-14-1357-RE [eCite] [Details]

Citations: Scopus - 21Web of Science - 21

Co-authors: Hay FS; Pilkington SJ; Scott JB

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2011Pearce T, Scott JB, Pethybridge SJ, 'First Report of Witch's Broom Phytoplasma (16SrII-D Group) in Purple Coneflower in Australia', Plant Disease: An International Journal of Applied Plant Pathology, 95, (6) pp. 773. ISSN 0191-2917 (2011) [Letter or Note in Journal]

DOI: 10.1094/PDIS-03-11-0155 [eCite] [Details]

Citations: Scopus - 8Web of Science - 7

Co-authors: Scott JB; Pethybridge SJ

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2011Pearce T, Scott JB, Pethybridge SJ, 'Witch's broom phytoplasma infecting Echinacea pallida in Australia'', Phytopathology: International Journal of The American Phytopathological Society, 101 pp. (S139). ISSN 0031-949X (2011) [Professional, Non Refereed Article]

[eCite] [Details]

Co-authors: Scott JB; Pethybridge SJ

Conference Publication

(5 outputs)
YearCitationAltmetrics
2019Tai Elaine, Pearce T, Scott J, Barry Karen, 'Poster Board 33. Assessment of fungicide resistance in Botrytis cinerea from cherry fruit', Australasian Plant Pathology Society Conference 2019, 26-28 November 2019, Mebourne (2019) [Conference Extract]

[eCite] [Details]

Co-authors: Tai Elaine; Scott J; Barry Karen

2015Scott J, Pearce T, Pilkington S, Hay F, 'Genetics governing the differential response to boscalid of Microsphaeropsis tanaceti and Stagonosporopsis tanaceti', Proceedings of the 2015 American Phytopathological Society Annual meeting, 1-5 August 2015, Pasadena, California, pp. S4.125. ISSN 0031-949X (2015) [Conference Extract]

DOI: 10.1094/PHYTO-105-11-S4.1 [eCite] [Details]

Co-authors: Scott J; Pilkington S; Hay F

Tweet

2014Pearce TL, Scott JB, Pethybridge SJ, Hay FS, 'Mating type distributions of Microsphaeropsis tanaceti isolated from pyrethrum fields in Tasmania, Australia', 2014 APS-CPS Joint Meeting - Abstracts of Presentations, 9-13 August, Minneapolis, Minnesota, pp. S3.90. (2014) [Conference Extract]

[eCite] [Details]

Co-authors: Scott JB; Pethybridge SJ; Hay FS

2014Scott JB, Arvier R, Pearce TL, Pilkington S, Pethybridge SJ, et al., 'Symptomatology of crown rot of pyrethrum caused by Sclerotinia spp. in Tasmania, Australia', 2014 APS-CPS Joint Meeting - Abstracts of Presentations, 9-13 August, Minneapolis, Minnesota, pp. S3.105. (2014) [Conference Extract]

[eCite] [Details]

Co-authors: Scott JB; Pilkington S; Pethybridge SJ; Hay FS

2011Pearce TL, Scott JB, Pethybridge SJ, 'Witch's broom phytoplasma infecting Echinacea pallida in Australia', 2011 APS-IPPC Joint Meeting Abstracts of Presentations, 6-10 August, Honolulu, Hawaii, pp. S139. (2011) [Conference Extract]

[eCite] [Details]

Co-authors: Scott JB; Pethybridge SJ

Contract Report, Consultant's Report

(1 outputs)
YearCitationAltmetrics
2016Pearce T, Pilkington S, Hay F, Scott J, 'Tan spot disease: An emerging threat to pyrethrum production', Botanical Resources Australia Agriculture Services Pty. Ltd, Hobart, Australia (2016) [Contract Report]

[eCite] [Details]

Co-authors: Pilkington S; Hay F; Scott J

Grants & Funding

Funding Summary

Number of grants

8

Total funding

$2,068,742

Projects

Mechanisms and spread of fungicide resistance in pyrethrum fungal pathogens (2022 - 2025)$113,648
Description
Pyrethrum is an important part of cropping production in Tasmania, being grown for the natural insecticides pyrethrins. Diseases of pyrethrum are a major constraint on production in Tasmania caused by a complex of fungal pathogens. Management of these diseases requires the use of multiple applications of chemical fungicides each year. However, this exposes the industry to the risk of resistance building up within the pathogen population, reducing the efficacy of control leading to undesirable impacts on the economics and environmental sustainability of pyrethrum production.This project will focus on understanding the risk of fungicide resistance in key fungal pathogens of pyrethrum. Potential studies include looking into the genetic mechanisms that govern resistance, assessing the current extent of resistance present in field populations and evaluating the risk of resistance developing in the future. Answering questions associated with these issues will help the pyrethrum industry better manage fungicide usage into the future. As such, the project aims to produce impactful outcomes for Tasmanian agriculture.This project is to support a PhD candidate to be based at the CCC in Burnie. In conducting this project, the candidate will be supported by, and collaborate with, Botanical Resources Australia, the commercial operator of the Australian pyrethrum industry. The project will involve a combination of field-, glasshouse- and laboratory-based experimentation. Funds for operating costs and 50% of a co-funded PhD scholarship will be provided by BRA. The remaining 50% scholarship will be sought via competitive process within the TIA scholarship allocation.This intention for contracting of this project is to have the contract agreed upon and signed, but contract start and end to be timed with the start of a suitable PhD candidate.
Funding
Botanical Resources Australia Pty Ltd ($113,648)
Scheme
Contract Research
Administered By
University of Tasmania
Research Team
Scott JB; Pearce T
Period
2022 - 2025
Development of regional risk models for fungal diseases in pyrethrum (2021 - 2023)$516,923
Description
Disease management in pyrethum is a major concern. Diseases such as ray blight and tan spot represent a major risk to yield and the industrys ability consistently meet market production requirements. Managing that disease also represents a major financial and environmental cost. Therefore, any effort to reduce these costs without major disease yield losses would be beneficial.Currently, a standard industry wide recommended spray program is deployed to manage disease. However, anecdotal evidence from growers and initial results obtained from previous studies suggests that different growing regions are subject to different levels of disease pressure. It is suggested that if the relative risk of disease is quantified across the different growing regions, disease control strategies could be refined for the different regions. This would lead to an overall reduction in control costs by reducing fungicide sprays in low risk regions, whilst ensuring high risk regions are subject to sufficient sprays to mitigate disease losses. This reduced level of fungicide inputs would also help the industry minimise the spread of fungicide resistance in the fungal pathogen populations, an issue that is of increasing importance.This project aims to develop a risk framework for the pyrethrum industry that can be used to adapt their disease management strategies in accordance with region and environmental conditions. It is also envisaged that this work will lead to at least 3 Q1 research publications.
Funding
Horticulture Innovation Australia ($516,923)
Scheme
Request for Proposal
Administered By
University of Tasmania
Research Team
Scott JB; Pearce T; Weichelt PE
Period
2021 - 2023
Tissue culture techniques for pyrethrum (2020 - 2021)$61,639
Description
The Tasmanian pyrethrum industry are seeking a method to store their high yielding pyrethrum lines and to quickly bulk up plants with favourable phenotypes/genotypes for further evaluation.The current methods of bulking up plants involve splitting plants into smaller plants manually, which is both stressful on the plants and only allows a few splits per plant. Plants must also be of sufficient size prior to splitting which limits the ability to bulk up young plants.This project will develop tissue culture techniques for use on field plants. It will include techniques to propagate, store, and acclimatise plants for replanting. Development of such techniques will also be beneficial to future pyrethrum projects that TIA are involved in as it will allow true replicates of plant genotypes to be included in experiments (including in the current projects on pyrethrum disease and vernalisation).
Funding
Botanical Resources Australia Pty Ltd ($61,639)
Scheme
Contract Research
Administered By
University of Tasmania
Research Team
Pearce T; Pilkington S
Period
2020 - 2021
Resistance of Botrytis cinerea to selected fungicides (2019)$25,354
Description
This project will use best-practice protocols to determine growth response of single genotype Botrytis cinerea isolates in response to a range of fungicides currently in commercial use. This will involve laboratory trials, data analysis, calculation of EC50 and classification of isolates into resistance group. Botrytis cinerea is an important pathogen of fruit crops which can cause significant crop losses, and studies of this nature have not been conducted in Tasmanian horticultural systems before.
Funding
Fruit Growers Tasmania Inc ($25,354)
Scheme
Contract Research
Administered By
University of Tasmania
Research Team
Barry KM; Pearce T; Oliver GS
Year
2019
Investigating the genetics of pyrethrum vernalisation (2018 - 2023)$417,158
Funding
Botanical Resources Australia Pty Ltd ($417,158)
Scheme
Contract Research
Administered By
University of Tasmania
Research Team
Pearce T; Pilkington S; Scott JB
Period
2018 - 2023
Integrated disease management in pyrethrum (2017 - 2020)$748,195
Description
The Australian pyrethrum industry based in Tasmania and Victoria, accounts for over 50% of the world market for the natural insecticides, pyrethrins. An increasing number of foliar and flower diseases are significant constraints on production, reducing yield and the life span of perennial crops. The management of these involves significant inputs of chemical fungicides during production. However, costs and risks of fungicide resistance are increasingly recognised by the industry. This project aims to aid pyrethrum growers in minimising these issues by determining the dominant pathogens affecting the crop, the timing of their influence, and their susceptibility to key fungicides. This information will be used to optimise the number and timing of fungicide applications, and be combined with efforts to foster increased host resistance and reduce pathogen carryover between seasons. Ultimately, this will help the industry decrease its reliance on fungicides, reducing the economic and environmental costs of production, whilst increasing pyrethrum yields across the production region.
Funding
Horticulture Innovation Australia ($748,195)
Scheme
Grant-General Call
Administered By
University of Tasmania
Research Team
Scott JB; Pearce T
Period
2017 - 2020
Improving the integrated management of pyrethrum diseases (2016 - 2017)$77,239
Description
The Australian pyrethrum industry is the world leader in the production of the natural insecticides, pyrethrins. The industry is based predominantly in northern Tasmania and is a key component of many cropping rotations employed by growers in the region. Commercial production is limited by several fungal diseases that are capable of having major impacts on crop yields. To manage this issues, the industry employs an extensive fungicide program, developed through close collaboration with TIA, over the life of the crop. However, the evolving nature of the pathogen population has highlighted concerns about the long term sustainability of such strategies. As such, the industry has shift its disease research priorities towards the integration of alternative strategies for disease control. Much of the ground work for such shifts were laid down by work conducted by TIA in the recently completed HIA funded project Integrated Disease Management in Pyrethrum. However, this work highlighted areas where further work is required. This proposed project aims to directly address these key questions that require further scientific study.
Funding
Botanical Resources Australia - Agricultural Services Pty Ltd ($77,239)
Scheme
Contract Research
Administered By
University of Tasmania
Research Team
Scott JB; Pearce T
Period
2016 - 2017
Tan Spot disease an emerging threat to pyrethrum production (2012 - 2015)$108,586
Funding
Botanical Resources Australia - Agricultural Services Pty Ltd ($108,586)
Scheme
Contract Research
Administered By
University of Tasmania
Research Team
Scott JB; Pearce T; Hay FS
Period
2012 - 2015

Research Supervision

Current

1

Current

DegreeTitleCommenced
PhDMechanisms and Spread of Fungicide Resistance in Pyrethrum Fungal Pathogens2021