Audio
Podcast

Christmas Edition!

Harvest is done and dusted for the majority of growers across the nation.

In this Christmas edition podcast which is our last for the year, we catch up with Nick McKenna from Planfarm, who caught up with growers in WA’s Esperance region on their use of chaff lines and tram lines.
We also hear from farmers in that region. Our Northern Region Extension Officer Paul McIntosh officers his insights into Grain Sorghum too. It’s our last podcast for 2016, so come along for the ride!
 

Video
Webinar

Resistance in corn, soybean & cotton crops in the US

Webinar 2: Resistance in corn, soybean & cotton
Part 2 of our Webinar Series: America and Australia share expertise to fight resistance, looks at resistance in corn, soybean and cotton.
It features special guest US Professor Jason Norsworthy.
Peter Newman asks Jason if the US is thinking about alternatives to glyphosate.
Given their high dependence on RR crops, what are the repercussions of this strategy?
Jason is evangelical in his quest to keep glyphosate working for corn, soybean and corn, soybean and cotton crops.
What are the challenges and the strategies being used to address creeping resistance?
You can watch the webinar below to find out!
 
Webinar 1: Understanding P450s to better manage resistance
In Part 1 of this webinar series, we look at how to understand how plants evolve resistance to a herbicide that has not yet been used.
Colorado State University researcher, Todd Gaines and AHRI’s Roberto Busi are the presenters on this webinar.
Host Peter Newman also asks the presenters what the genetic basis of metabolic resistance is and can we control metabolic resistant weeds?
Todd explains the science with Roberto Busi outlining new results on interactions between an insecticide and current pre-emergent herbicides to control ryegrass.
 
Podcasts
You can hear more from Roberto Busi in the AHRI Snapshots podcast. He recently spoke about
He recently spoke about his research and its implications on using pre-emergent herbicides. Timely advice for growers and agronomists out there!
You can listen to the podcast here.
You can read more on it in the AHRI blog too. Click here to read.

Audio
Podcast

Harvest Part 2

In this second podcast focusing on harvest Peter Newman and Jessica Strauss discuss harvest losses and chaff carts, talking to guests Kondinin Group’s Ben White, and Agpro Management owner Ed Riggall.

For more details on chaff carts, take a look at AHRI Insight #74 here.
You can find out more details on the Research Report from March 2014 which was discussed with Ben White here.

Video
Webinar

Understanding P450s to better manage resistance

Webinar 1: Understanding P450s to better manage resistance
In Part 1 of this webinar series, we look at P450s and understanding how plants evolve resistance to a herbicide that has not yet been used. Colorado State University researcher, Todd Gaines and AHRI’s Roberto Busi are the presenters of this webinar.
Host Peter Newman asks the presenters what the genetic basis of metabolic resistance is.
So, can we control metabolic resistant weeds? Todd explains the science and gives us the answers.
Roberto Busi outlines new results on the interactions between an insecticide and current pre-emergent herbicides to control ryegrass.
Webinar 2: Resistance in corn, soybean & cotton
Part 2 of our Webinar Series: America and Australia share expertise to fight resistance, looks at resistance in corn, soybean and cotton. It features special guest US Professor Jason Norsworthy.
Peter Newman asks Jason if the US is thinking about alternatives to glyphosate. Given their high dependence on RR crops, what are the repercussions of this strategy?
Jason is evangelical in his quest to keep glyphosate working for corn, soybean and corn, soybean and cotton crops. What are the challenges and the strategies being used to address creeping resistance?
You can watch this webinar here.

Audio
Podcast

Harvest Part 1

With harvest kicking off across Australia, we check in with Warren Treasure who is using the iHSD.

John Broster talks about the research he and Michael Walsh conducted on catching weed seeds and we hear from Ray Harrington on the history of the Harrington Seed Destructor and where it is today.

Audio
Podcast

Frost, floods and 2,4-D

Over the last few weeks the parts of Western Australia have been impacted by frost, while some growers in the East have had to deal with floods.
In this first AHRI WeedSmart podcast, we look at what this means for growers, as well as checking in with some new research on 2,4-D.

Video
Webinar

Strike weeds early in the north and prevent resistance

Strike weeds early
You’ve got to strike weeds early in the north to keep abreast of resistance.
The northern region is a hotspot for glyphosate resistance with 8 of 12 species of weeds in the region having resistance and appearing mostly in patches.
Department of Primary Industries NSW technical specialist Tony Cook explains the consequences of this.
He explains how it’s imperative in the north to strike weeds early in fallow to control resistance.
 
The Northern region is a glyphosate resistance hotspot!
Strike weeds early
You’ve got to strike weeds early in the north to keep abreast of resistance.
The northern region is a hotspot for glyphosate resistance with 8 of 12 species of weeds in the region having resistance and appearing mostly in patches.
Department of Primary Industries NSW technical specialist Tony Cook explains the consequences of this.
He explains how it’s imperative in the north to strike weeds early in fallow to control resistance.
You can watch the webinar in full below.
 
‘Is fallow weed management cost effective?’
Featuring Tony Cook, Technical Specialist – Weeds with NSW DPI
If you’d like to find out more about fallow management, we also have a blog post with more of Tony’s advice.
With no crop competition in the fallow, weeds are free to grow bigger. They can produce about ten times more seed per plant than they can if they grow in-crop.
You can read the Ask an Expert with Tony Cook here.

Video
Webinar

Non-herbicide tactics that fit in the Northern region

Queensland DAF weeds researchers Michael Widderick and Annie van der Meulen discuss the importance of non-herbicide tactics.
In this webinar, they shine a light on herbicide resistance with new research from the Northern region (Qld and NSW).
They also examine the tools that can be used, other than herbicides, to combat weeds in the north.
 
Bulletin Board
Michael Widderick also has been interviewed on this topic for our Bulletin Board.
Diversity in cropping systems and diversity in weeds in the northern GRDC grains region of NSW and Queensland calls for diversity in weed management!
Those solutions include non-herbicide tactics.
Survey work in the region has identified more than 70 different weed species that impact on grain production.
More than 10% of these weed species has confirmed populations within Australia that are resistant to glyphosate and several other chemical modes of action (MOA).
Read the post in full here.

Fact Sheet

Herbicide resistant wild radish: take back control

Herbicide resistance in wild radish is developing fast!
Effective management to control wild radish populations is imperative to protect your productivity; prevent herbicide resistance and avoid its spread.
Key Messages

Implement an effectively timed 2-spray herbicide strategy
Wild radish size when treated greatly affects herbicide efficacy; always spray small plants
Using multiple mode-of-action chemical groups will delay onset of herbicide resistances
Prevent wild radish seed set. Deplete soil seed banks to wipe out herbicide resistant populations and impede the development of resistance

Fact Sheet

Maximise Clethodim Performance: Impact of Frost

Growers are reporting variable control of annual ryegrass with clethodim. Poor performance of clethodim can be attributed to cold and frosty conditions. In 2013 and 2014 trials to examine the effect of frost on clethodim treatment of annual ryegrass were conducted under controlled conditions using a frost chamber to mimic a frost event.
Key Message
Frost events in the few days before or after Clethodim application can reduce activity of the herbicide on annual ryegrass. Clethodim efficacy tends to be reduced more substantially by frost where ryegrass populations have evolved resistance to this herbicide.

Fact Sheet

Disc seeding systems and pre-emergent herbicides

Disc seeding system design and settings influence pre-emergent herbicide behaviour and can play a critical role in minimising crop damage.
Ideal set-up of disc seeding systems, to maximise weed control with pre-emergent herbicides whilst minimising crop damage, requires an understanding of how the products interact with the crop and the distribution of weed seeds in the seedbank, as well as knowledge of soil type, likely rainfall and surface residues. Using pre-emergent herbicides is not cut-and-dry!
 

Video
Webinar

Glyphosate resistance in ryegrass

The magnifying glass is put to glyphosate resistance in ryegrass in this webinar!
AHRI’s Peter Newman hosts the webinar with presenter Plant Science Consulting principle and University of Adelaide researcher, Dr Peter Boutsalis.
Peter helps us understand why plants surviving a glyphosate spray in the field aren’t always resistant.
Resources

Plant Science Consulting (resistance testing)
Article: Don’t jeopardise glyphosate for clean fencelines
Australian Glyphosate Sustainability Working Group

 
Q & A Timestamps
22:06 I thought Dave Minkey did some work and showed 8L/ha of glyphosate didn’t kill ryegrass, but weren’t resistant, and it was due to the waxy leaf from early water stress?
23:36 Should we eradicate brome populations (glyphosate resistant brome populations) when we find them? (Taking a biosecurity approach and treating it like a noxious weed?) [AUDIENCE POLL]
28:03 What is the ideal water rate to spray glyphosate on ryegrass?
30:03 Does spray topping for seed set control of glyphosate resistant ryegrass or brome grass work considering that it’s sequestration at the tip e.g. does it go to the seed head?
31:52 Does dust from tractors in dry fallow neutralise glyphosate? E.g. for waxy leaves?
32:15 What about the use of adjuvants to improve the efficacy of glyphosate?
53:42 What is the optimum time to come back and double knock firebreaks?
56:37 In a Roundup Ready crop, would you prefer two applications of 1L/ha four weeks apart, or a single application of 2L/ha?
57:42 Spraying glyphosate at night in the cool verses spraying during the day?
58:54 Alliance (paraquat and amitrole) being good on fencelines?
59:49 On the label for UltraMax it talks about using a coarse to very coarse spray quality. Are coarse droplets too big to hit small ryegrass?

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