View time: 47.58 minutes

Combat Velocity® resistant wild radish with the WeedSmart Big 6

AHRI researcher Dr Roberto Busi discovered Velocity® resistant wild radish populations in two paddocks in the northern Wheatbelt of Western Australia.


The resistance evolved in these two paddocks after 8-12 shots of Velocity over a 12-year period. Velocity was often mixed with MCPA in these paddocks, but this was the only herbicide used for wild radish control in cereals.

In this webinar, we discuss how this resistance occurred and what growers can do to mitigate the risk of resistance developing in their paddocks.

The webinar is resented by Dr Roberto Busi and PhD candidate Rex Cao, and hosted by WeedSmart western extension agronomist, Peter Newman.

Topics covered include:

  • Paddock history.
  • How Roberto first found the resistance.
  • Are there other populations?
  • Details of Roberto’s early testing – rate, size, survival rate etc.
  • Details of Roberto’s ongoing research. Cross resistance to other HPPD’s. Likely mechanism.
  • Management – how to avoid it and how to manage radish after Velocity resistance happens.

More resources

Peter Newman wrote an AHRI Insight on the topic. Read the article here, or watch the accompanying video below.

Related Articles

View all

S8E22: Regional Update – Katrina Swift, Grower, Parkes, NSW

This week on the Regional Update, we are joined by grower Treen Swift who tells us how having 13 crop options available helps her family manage weed and insect pressure. Read More...

Biological control of crop weeds – development of novel tools and approaches for integration

In this webinar we discuss the use of pathogens and insects to control crop weeds safely in the environment. Read More...

S8E20: Regional Update – Dan Skerman, Grower and Agronomist, Dalby, Qld

This week on the Regional Update, we are joined by grower and Nutrien agronomist Dan Skerman, who talks about his summer/winter rotation and the weed control practices he deploys on the farm. Read More...

S08E19: Crop preparation ahead of harvest and optimum harvester set-up for HWSC

In this podcast, we talk about harvest preparedness. We hear from two of WeedSmart’s extension agronomists. Read More...

The economics of weeds — what they cost and the benefits of managing them effectively

In this webinar, we discuss the yield reduction weeds are responsible for and what a well-planned rotation for weed management can make a farming business. Read More...

S08E16: Enemy number one was ryegrass at Dubbo WeedSmart Week

In this podcast, we hear about the key messages shared by presenters and panel members at WeedSmart Week Dubbo. Read More...

Subscribe to the WeedSmart Newsletter