Our webinars bring you the latest on-farm strategies farmers and agronomists are using to manage weed numbers in broadacre crops. Anywhere you have an internet connection, on a smartphone or computer, you can register and join us for one of our regular webinar series.


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.


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.


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.


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.

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?


Emerging trends

New technologies in agriculture don’t come around too often… but new weed threats seem to!
AHRI’s Peter Newman joins the unforgettable inventor and farmer Ray Harrington, accompanied by Devon Gilmour of McIntosh & Son, to talk about the opportunities and challenges of incorporating the iHSD into Australia’s cropping systems.

Webinar recording: Setting up your header for harvest weed seed control
AHRI insight: The integrated Harrington Seed Destructor has arrived
AHRI insight: Harvester setup with Ray Harrington

Q&A Timestamps
18:30 How does capacity go in canola where there is more bulk with potentially oily chaff?
22:10 How many hours is the cage expected to last? Is there a price list available on wearing parts?
24:55 Is there any issue with fire danger?
25:32 How will they fit to a New Holland? Is mechanical drive an option?
27:04 I can understand the flow of the counter rotating mill, but what effect is the stator on moist chaff with flow and blockage?
27:55 How do you judge grain loss, if everything is milled?
30:02 If the mills wear uneven, will they go out of balance?
31:20 How wide will it spread product?
58:16 What L of oil per minute of oil flow is needed?


Maximise your crop

Are you ready to destroy weed seeds this harvest?
Yes? Then check out these two webinar recordings.
Part 1: Controlling harvest weed seed set with windrows & crop topping
Windrowing barley could be an option this year if you struggle with the pressure of harvesting a number of crops at the same time. The added bonus? It gives you another shot at the weeds! Peter Newman (AHRI) and Tim Condon (Delta Ag) step through the prerequisites and benefits of windrowing barley, plus investigate the use of crop topping to manage weed seed set in the final stages of the season.

Part 2: Setting up your header for harvest weed seed control
One of the main limitations of harvest weed seed control is the ability to direct weed seeds into the chaff cart, or destructor, or any of the other HWSC tools. Once the weed seeds enter the front of the harvester it is imperative to get them out of the rotor and onto the sieves so they can be captured or destroyed.Peter Newman (AHRI) and Ray Harrington (Darkan grain grower) cover how to set up your harvester for any of the HWSC tools. Not to be missed!



Attack the weed seed bank

You have two options:
1. Go it alone
2. Learn from the experts
We’d pick the second option. If you did too, we have two webinar recordings for you!
We cover the best ways to collect and destroy weed seeds present at harvest, how to make harvest weed seed control work in your system (without pulling your hair out), plus share handy tips you only learn by experience.
Part 1: Narrow windrow burn like a pro
Weeds don’t play fair. Peter Newman (AHRI) and Rod Messina (Mullewa grain grower) discuss how to level up your narrow windrow burning and attack the weed seed bank. They cover how to get started, the pitfalls to look out for, economics of the system, plus modification design options for your harvester.

10 Point Plan: Create and burn narrow windrows
Windrow chute CAD drawings
AccuFire Broadacre Firelighter
AHRI insight: Tips
AHRI insight: Burning wet windrows
GRDC video playlist: IWM – narrow windrow burning

Part 2: Chaff carts as part of the arsenal
How’d you like to reduce your ryegrass and other weed numbers by up to 95%? You would be crazy to say no! Lance Turner (Corrigin grain grower) knows the chaff cart is not a silver bullet, but reckons it’s a pretty big linchpin for his weed management system. Pete and Lance discuss how low weed numbers give you more options, the logistics and economics of collecting chaff and burning the heaps, plus handy tips you pick up with 10 years of experience (Lance has done the hard work for you!).


10 Point Plan: Tow a chaff cart
AHRI’s Ryegrass Integrated Management (RIM) program
AHRI’s financials factsheet including nutrient removal (new chaff cart) (second-hand chaff cart)
Grazing chaff dumps webinar with Andrew Boultbee
GRDC video playlist: IWM – Chaff carts


It’s a numbers game

As herbicide resistance takes hold the only option to continue cropping is to take a long term view and strive for a very low seed bank using a diverse range of tools. Herbicide resistance is not a problem if you have no weeds. The panel features leading weed researchers, farmers and agronomists from across Australia and discusses the range of options available to help manage the weed seed bank, as well as general strategies to help promote the long term sustainability of herbicides.


Setting crops up for success with Dr Chris Preston

Choosing and applying the right pre-emergent herbicide
Choosing and applying the right pre-emergent herbicide can be difficult, particularly if herbicide resistance is becoming a challenge in a no-till system. Dr Chris Preston, University of Adelaide (UA) explains the chemistry of pre-emergent herbicides, how they work and what’s best for your operation.
You can watch the webinar below for more information.

Given the significant up-front cost of buying good quality seed, it’s tempting to cut back on seeding rates to minimise costs.
Lead scientist and director of the Graham Centre for Agricultural Innovation at Charles Sturt University, Professor Deirdre Lemerle takes the opposite view.
She’s calling on growers to consider using high seeding rates and competitive cultivars to suppress weeds and achieve savings through reduced herbicide costs, more reliable herbicide performance and resistance management.

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