View time: 42:20 minutes

First cases of glyphosate and paraquat resistant ryegrass in WA

For the first time in Western Australia, annual ryegrass from a cropped paddock was found to be resistant to glyphosate and paraquat.

Farmanco Agronomist Consultant Brent Pritchard gives some context on how this resistance evolved in the field.

AHRI Senior Research Fellow Dr Roberto Busi presents the preliminary results he obtained in recent glasshouse trials, which aimed to characterise the resistance.

Roberto will conduct two field trials in 2022. He explains what treatments he is planning to test, including different double knocks options.

The webinar was hosted by WeedSmart western extension agronomist, Peter Newman.

Topics covered include:

  • History of the paddocks where the two cases of dual resistance were found
  • Results of pot trials (resistance tests done in the glasshouse)
  • Plans for field trials

Related Articles

View all
Fact Sheet

Mixing and batching for agricultural chemical application technical guide

Avoid chemical mixing errors and see how growers are setting up their batching systems for added efficiencies. Read More...

How faba beans pack a punch against sowthistle

Research shows there are opportunities to alter the agronomy of faba beans to suppress sowthistle growth and seed production in crop. Read More...

Combat Velocity® resistant wild radish with the WeedSmart Big 6

AHRI researcher Dr Roberto Busi explains in this webinar how he discovered Velocity® resistant wild radish populations in two paddocks in the northern Wheatbelt of Western Australia. Read More...

No survivors – weed control in cotton, what does it look like in 2022?

Research Agronomist Eric Koetz and WeedSmart Northern Extension Agronomist Paul McIntosh discuss key weed control challenges cotton growers are facing. Read More...

S07E11: Dealing with stress on the farm and resistance testing wins

Owen Catto from The Regional Men’s Health Initiative joins us to share some tips on dealing with stress and we hear from Tim Boyes on resistance testing wins. Read More...

Making Every Drop(let) Count – An International Perspective on Spraying Efficiencies

WeedSmart southern extension agronomist Chris Davey and Canadian spray technology expert Tom Wolf discuss efficient and effective spray application. Read More...

Subscribe to the WeedSmart Newsletter