Fleur Dolman

Dr Fleur Dolman

Postdoctoral Fellow - Communications

School of Agriculture, Food and Wine

Faculty of Sciences

Dr. Fleur Dolman is a senior research fellow within the Weed Science Research Group. She manages agricultural weed research projects with a focus on extension, demonstration and communication.
Understanding and managing agricultural weeds, including those that are herbicide resistant, is the key focus of the Weed Science Research Group.

Management of Ryegrass in the High Rainfall Zone (HRZ)

Annual ryegrass can be particularly challenging to manage in the high rainfall zone (HRZ). Widespread resistance to post-emergent herbicides used in cereals means there is strong reliance on pre-emergent herbicides for ryegrass control. Annual ryegrass seed banks in the HRZ tend to be high and there is late emergence of weeds due to the long and cool growing season. These late emerging plants contribute to high seed set that maintains populations. As a result, ryegrass populations quickly rebound when management pressure is reduced. Late maturity of cereals means that 50% or more of the ryegrass seed can be shed prior to harvest, reducing the efficacy of harvest weed seed controls. On the plus side, moderate populations of ryegrass (<100 plants per m2) have less impact on yield than they do in other regions.

This project aims to demonstrate annual ryegrass management strategies in the HRZ, providing confidence for agronomists and growers to make on-farm management changes that are effective and profitable.

The Project:

  • Five demonstration sites have been established across southern Victoria and the SE of South Australia in collaboration with MacKillop Farm Management Group (SA) and Southern Farming Systems (VIC). 
  • Sites were sown to break crops in 2018 and wheat in 2019.
  • Each site has 4 annual ryegrass management strategies with increasing management intensity to demonstrate strategies that may provide effective and profitable management of annual ryegrass in the HRZ.
  • The management strategies employed at each site have been developed with local agronomists.
  • There were opportunities to view the sites during the season.

Plot plans, treatments and data collected at each site is available via the HRZ ryegrass management portal.

For more information about research projects in our group visit  the Weeds Research Group Website
Date Source Title Investigators
2018 - 2020 GRDC Development of local strategies to enable the integrated and profitable management of Annual ryegrass seed banks in high rainfall zone farming systems of the Southern Region. Preston C (Prinicpal),
Gill G,
Dolman F.
2015 - 2020 GRDC Mechanisms, evolution and inheritance of herbicide resistance.

Preston C (Principal);
Malone J;
Krishnan M;
Dolman F.

  • Position: Postdoctoral Fellow - Communications
  • Phone: 83130544
  • Email: fleur.dolman@adelaide.edu.au
  • Campus: Waite
  • Building: Waite, floor GE
  • Room: GE 03
  • Org Unit: School of Agriculture, Food and Wine

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