Dr Michael Walsh

Director Weed Research
Plant Breeding Institute

Member of Sydney Institute of Agriculture

E12 - Plant Breeding Institute Narrabri
The University of Sydney

Telephone +61 2 6799 2201

Curriculum vitae Curriculum vitae

Biographical details

Michael Walsh is an Associate Professor and Director of Weed Research with the University of Sydney. He grew up on a farm in Victoria before completing a BSc (Agri.) at the University of Western Australia 1985, MSc. (Agron.) at La Trobe University, Melbourne (1995) and a PhD (Agron.), University of Wyoming (1998). Michael then worked with the Australian Herbicide Resistance Initiative from 1999 to 2016 where he focused on the research and development of harvest weed seed control (HWSC) systems.

His efforts in the area of HWSC have led to the introduction and the Australia wide adoption of systems that target weed seed during crop harvest. Michael also researched the characterisation and management of herbicide resistance in wild radish (Raphanus raphanistrum) populations. Michael joined the University of Sydney in 2016 where he is responsible for leading weed research and development across GRDC’s northern cropping region.

Research interests

Michael is interested in the development of new and innovative weed control strategies, particularly for crop production systems. His research remains focused on systems that target weed seed production during crop harvest. He is also involved in using agricultural engineering solutions to the weed management problems in cropping systems.

Specifically, investigating strategic tillage and the development of site-specific weed control systems. Michaels work on herbicide resistance is aimed at characterising the frequency and extent of herbicide resistance in the endemic weed populations of cropping systems.

Teaching and supervision

Michael currently supervises one student. Project Title:Modeling the evolution of herbicide resistance incorporating spatial heterogeneity and integrated weed management.

Current research students

Project title Research student
Use of Crop competition to control feather top rhodes grass Aman Deep SHARMA

International links

United States

(University of Arkansas) Research collaboration with Dr. Jason Norsworthy on a USDA project investingating the efficacy of harvest weed seed control on weeds of soybean production systems

Selected grants

2015

  • Physical Management Options for Herbicide Resistant Weeds - Targeted Tillage; Walsh M, Guzzomi A; Grains Research and Development Corporation (GRDC)/Research Support.
  • HWSC – northern region; Walsh M; Grains Research and Development Corporation (GRDC)/Research Support.

Selected publications

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Book Chapters

  • Walsh, M. (2016). Weed management in dryland cropping systems. In M Farooq and K H M Siddique (Eds.), Innovations in Dryland Agriculture, (pp. 99-114). Cham: Springer. [More Information]

Journals

  • Walsh, M., Aves, C., Powles, S. (2017). Harvest weed seed control systems are similarly effective on rigid ryegrass. Weed Technology, 31(2), 178-183. [More Information]
  • Bajwa, A., Walsh, M., Chauhan, B. (2017). Weed management using crop competition in Australia. Crop Protection, 95, 8-13. [More Information]
  • Ashworth, M., Walsh, M., Flower, K., Vila-Aiub, M., Powles, S. (2016). Directional selection for flowering time leads to adaptive evolution in Raphanus raphanistrum (Wild radish). Evolutionary Applications, 9(4), 619-629. [More Information]
  • Schwartz, L., Norsworthy, J., Young, B., Bradley, K., Kruger, G., Davis, V., Steckel, L., Walsh, M. (2016). Tall Waterhemp (Amaranthus tuberculatus) and Palmer amaranth (Amaranthus palmeri ) seed production and retention at soybean maturity. Weed Technology, 30(1), 284-290. [More Information]
  • Dillon, A., Kron, P., Walsh, M., Jugulam, M. (2016). Transfer of 2,4-D-resistance from Raphanus raphanistrum into Brassica napus: production of F1 hybrids through embryo rescue. Canadian Journal of Plant Science, 96(3), 384-386. [More Information]
  • Ashworth, M., Walsh, M., Flower, K., Powles, S. (2015). Identification of glyphosate-resistant Lolium rigidum and Raphanus raphanistrum populations within the first Western Australian plantings of transgenic glyphosate-resistant canola. Crop and Pasture Science, 66(9), 930-937. [More Information]
  • Walsh, M., Powles, S. (2014). High Seed Retention at Maturity of Annual Weeds Infesting Crop Fields Highlights the Potential for Harvest Weed Seed Control. Weed Technology, 28(3), 486-493. [More Information]
  • Ashworth, M., Walsh, M., Flower, K., Powles, S. (2014). Identification of the first glyphosate-resistant wild radish (Raphanus raphanistrum L.) populations. Pest Management Science, 70(9), 1432-1436. [More Information]
  • Jugulam, M., Walsh, M., Hall, J. (2014). Introgression of phenoxy herbicide resistance from Raphanus raphanistrum into Raphanus sativus. Indian Journal of Genetics and Plant Breeding, 133(4), 489-492. [More Information]
  • Walsh, M., Powles, S. (2014). Management of herbicide resistance in wheat cropping systems: Learning from the Australian experience. Pest Management Science, 70(9), 1324-1328. [More Information]
  • Walsh, M. (2014). The importance of harvest weed seed control in weed management. International Pest Control, 56(5), 268-270.
  • Jugulam, M., Dimeo, N., Veldhuis, L., Walsh, M., Hall, J. (2013). Investigation of MCPA (4-chloro-2-ethylphenoxyacetate) resistance in wild radish (Raphanus raphanistrum L.). Journal of Agricultural and Food Chemistry, 61(51), 12516-12521. [More Information]
  • Walsh, M., Groose, R., Obour, A., Claypool, D., Delaney, R., Krall, J. (2013). Seed persistence in soil of five medic cultivars in southeastern wyoming. Crop Science, 53(2), 674-678. [More Information]
  • Walsh, M., Newman, P., Powles, S. (2013). Targeting weed seeds in-crop: A new weed control paradigm for global agriculture. Weed Technology, 27(3), 431-436. [More Information]
  • Han, H., Yu, Q., Purba, E., Li, M., Walsh, M., Friesen, S., Powles, S. (2012). A novel amino acid substitution Ala-122-Tyr in ALS confers high-level and broad resistance across ALS-inhibiting herbicides. Pest Management Science, 68(8), 1164-1170. [More Information]
  • Walsh, M., Harrington, R., Powles, S. (2012). Harrington Seed Destructor: A new nonchemical weed control tool for global grain crops. Crop Science, 52(3), 1343-1347. [More Information]
  • Yu, Q., Han, H., Li, M., Purba, E., Walsh, M., Powles, S. (2012). Resistance evaluation for herbicide resistance-endowing acetolactate synthase (ALS) gene mutations using Raphanus raphanistrum populations homozygous for specific ALS mutations. Weed Research, 52(2), 178-186. [More Information]
  • Walsh, M., Stratford, K., Stone, K., Powles, S. (2012). Synergistic effects of atrazine and mesotrione on susceptible and resistant wild radish (Raphanus raphanistrum) populations and the potential for overcoming resistance to triazine herbicides. Weed Technology, 26(2), 341-347. [More Information]
  • Busi, R., Gaines, T., Walsh, M., Powles, S. (2012). Understanding the potential for resistance evolution to the new herbicide pyroxasulfone: Field selection at high doses versus recurrent selection at low doses. Weed Research, 52(6), 489-499. [More Information]
  • Walsh, M., Fowler, T., Crowe, B., Ambe, T., Powles, S. (2011). The potential for pyroxasulfone to selectively control resistant and susceptible rigid ryegrass (Lolium rigidum) biotypes in Australian grain crop production systems. Weed Technology, 25(1), 30-37. [More Information]
  • Borger, C., Scott, J., Renton, M., Walsh, M., Powles, S. (2009). Assessment of management options for Salsola australis in south-west Australia by transition matrix modelling. Weed Research, 49(4), 400-408. [More Information]
  • Walsh, M., Maguire, N., Powles, S. (2009). Combined effects of wheat competition and 2,4-D amine on phenoxy herbicide resistant Raphanus raphanistrum populations. Weed Research, 49(3), 316-325. [More Information]
  • Borger, C., Scott, J., Walsh, M., Powles, S. (2009). Demography of Salsola australis populations in the agricultural region of South-West Australia. Weed Research, 49(4), 391-399. [More Information]
  • Walsh, M., Powles, S. (2009). Impact of crop-topping and swathing on the viable seed production of wild radish (raphanus raphanistrum). Crop and Pasture Science, 60(7), 667-674. [More Information]
  • Borger, C., Yan, G., Scott, J., Walsh, M., Powles, S. (2008). Salsola tragus or S. australis (Chenopodiaceae) in Australia - Untangling taxonomic confusion through molecular and cytological analyses. Australian Journal of Botany, 56(7), 600-608. [More Information]

2017

  • Walsh, M., Aves, C., Powles, S. (2017). Harvest weed seed control systems are similarly effective on rigid ryegrass. Weed Technology, 31(2), 178-183. [More Information]
  • Bajwa, A., Walsh, M., Chauhan, B. (2017). Weed management using crop competition in Australia. Crop Protection, 95, 8-13. [More Information]

2016

  • Ashworth, M., Walsh, M., Flower, K., Vila-Aiub, M., Powles, S. (2016). Directional selection for flowering time leads to adaptive evolution in Raphanus raphanistrum (Wild radish). Evolutionary Applications, 9(4), 619-629. [More Information]
  • Schwartz, L., Norsworthy, J., Young, B., Bradley, K., Kruger, G., Davis, V., Steckel, L., Walsh, M. (2016). Tall Waterhemp (Amaranthus tuberculatus) and Palmer amaranth (Amaranthus palmeri ) seed production and retention at soybean maturity. Weed Technology, 30(1), 284-290. [More Information]
  • Dillon, A., Kron, P., Walsh, M., Jugulam, M. (2016). Transfer of 2,4-D-resistance from Raphanus raphanistrum into Brassica napus: production of F1 hybrids through embryo rescue. Canadian Journal of Plant Science, 96(3), 384-386. [More Information]
  • Walsh, M. (2016). Weed management in dryland cropping systems. In M Farooq and K H M Siddique (Eds.), Innovations in Dryland Agriculture, (pp. 99-114). Cham: Springer. [More Information]

2015

  • Ashworth, M., Walsh, M., Flower, K., Powles, S. (2015). Identification of glyphosate-resistant Lolium rigidum and Raphanus raphanistrum populations within the first Western Australian plantings of transgenic glyphosate-resistant canola. Crop and Pasture Science, 66(9), 930-937. [More Information]

2014

  • Walsh, M., Powles, S. (2014). High Seed Retention at Maturity of Annual Weeds Infesting Crop Fields Highlights the Potential for Harvest Weed Seed Control. Weed Technology, 28(3), 486-493. [More Information]
  • Ashworth, M., Walsh, M., Flower, K., Powles, S. (2014). Identification of the first glyphosate-resistant wild radish (Raphanus raphanistrum L.) populations. Pest Management Science, 70(9), 1432-1436. [More Information]
  • Jugulam, M., Walsh, M., Hall, J. (2014). Introgression of phenoxy herbicide resistance from Raphanus raphanistrum into Raphanus sativus. Indian Journal of Genetics and Plant Breeding, 133(4), 489-492. [More Information]
  • Walsh, M., Powles, S. (2014). Management of herbicide resistance in wheat cropping systems: Learning from the Australian experience. Pest Management Science, 70(9), 1324-1328. [More Information]
  • Walsh, M. (2014). The importance of harvest weed seed control in weed management. International Pest Control, 56(5), 268-270.

2013

  • Jugulam, M., Dimeo, N., Veldhuis, L., Walsh, M., Hall, J. (2013). Investigation of MCPA (4-chloro-2-ethylphenoxyacetate) resistance in wild radish (Raphanus raphanistrum L.). Journal of Agricultural and Food Chemistry, 61(51), 12516-12521. [More Information]
  • Walsh, M., Groose, R., Obour, A., Claypool, D., Delaney, R., Krall, J. (2013). Seed persistence in soil of five medic cultivars in southeastern wyoming. Crop Science, 53(2), 674-678. [More Information]
  • Walsh, M., Newman, P., Powles, S. (2013). Targeting weed seeds in-crop: A new weed control paradigm for global agriculture. Weed Technology, 27(3), 431-436. [More Information]

2012

  • Han, H., Yu, Q., Purba, E., Li, M., Walsh, M., Friesen, S., Powles, S. (2012). A novel amino acid substitution Ala-122-Tyr in ALS confers high-level and broad resistance across ALS-inhibiting herbicides. Pest Management Science, 68(8), 1164-1170. [More Information]
  • Walsh, M., Harrington, R., Powles, S. (2012). Harrington Seed Destructor: A new nonchemical weed control tool for global grain crops. Crop Science, 52(3), 1343-1347. [More Information]
  • Yu, Q., Han, H., Li, M., Purba, E., Walsh, M., Powles, S. (2012). Resistance evaluation for herbicide resistance-endowing acetolactate synthase (ALS) gene mutations using Raphanus raphanistrum populations homozygous for specific ALS mutations. Weed Research, 52(2), 178-186. [More Information]
  • Walsh, M., Stratford, K., Stone, K., Powles, S. (2012). Synergistic effects of atrazine and mesotrione on susceptible and resistant wild radish (Raphanus raphanistrum) populations and the potential for overcoming resistance to triazine herbicides. Weed Technology, 26(2), 341-347. [More Information]
  • Busi, R., Gaines, T., Walsh, M., Powles, S. (2012). Understanding the potential for resistance evolution to the new herbicide pyroxasulfone: Field selection at high doses versus recurrent selection at low doses. Weed Research, 52(6), 489-499. [More Information]

2011

  • Walsh, M., Fowler, T., Crowe, B., Ambe, T., Powles, S. (2011). The potential for pyroxasulfone to selectively control resistant and susceptible rigid ryegrass (Lolium rigidum) biotypes in Australian grain crop production systems. Weed Technology, 25(1), 30-37. [More Information]

2009

  • Borger, C., Scott, J., Renton, M., Walsh, M., Powles, S. (2009). Assessment of management options for Salsola australis in south-west Australia by transition matrix modelling. Weed Research, 49(4), 400-408. [More Information]
  • Walsh, M., Maguire, N., Powles, S. (2009). Combined effects of wheat competition and 2,4-D amine on phenoxy herbicide resistant Raphanus raphanistrum populations. Weed Research, 49(3), 316-325. [More Information]
  • Borger, C., Scott, J., Walsh, M., Powles, S. (2009). Demography of Salsola australis populations in the agricultural region of South-West Australia. Weed Research, 49(4), 391-399. [More Information]
  • Walsh, M., Powles, S. (2009). Impact of crop-topping and swathing on the viable seed production of wild radish (raphanus raphanistrum). Crop and Pasture Science, 60(7), 667-674. [More Information]

2008

  • Borger, C., Yan, G., Scott, J., Walsh, M., Powles, S. (2008). Salsola tragus or S. australis (Chenopodiaceae) in Australia - Untangling taxonomic confusion through molecular and cytological analyses. Australian Journal of Botany, 56(7), 600-608. [More Information]

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