Digging into the details of problem weeds.

We’ll also be focusing on Feathertop Rhodes Grass and how this is proving to be an issue for growers in Northern New South Wales, with sporadic patches popping up. University of Adelaide Professor, Dr Chris Preston and Northern Grower Alliance CEO, Richard Daniel, join us to shed some light on this issue and how to get on top of this weed.
Our Southern Extension Agronomist, Greg Condon, joins us as the podcast co-host today.
We mentioned quite a few links on this week’s podcast – here they are!
We were excited to announce that WeedSmart Week is going ahead in Clare, South Australia. Find out more and get your tickets here.

GRDC weeds ute guide
With so much talk of problem weeds, we thought it was a good opportunity to encourage you to get your hands on the updated GRDC weeds ute guide. Find out more here.
Roadside Feathertop Rhodes grass (Chris Preston)

Finally, make sure you’re subscribed to the WeedSmart Whip Around newsletter, especially as we now have a new publication coming out every second month called the WeedSmart Review. This new publication features an easy to follow explainer on the weeds research happening from weed research institutes around the country. You can check out the first one here.

Hosts: Jessica Strauss & Greg Condon
Producer: Jessica Strauss


Epic focus paddock results & using S-Metolachlor effectively

Today on the podcast we’re going to be learning about how to use S-Metolachlor effectively and within the guidelines. Area Sales Manager from Syngenta Crop Protection for the Northern Commercial Unit, Tim Fraser joins us to tell us about this.
Syngenta’s Tim Fraser
We also will be hearing from the Department of Primary Industries and Regional Development grain researcher, Martin Harries (pictured at the top), about a six-year focus paddock survey he has led.
The survey work Martin did collected data from 184 paddocks spanning 14 million hectares of cropping land in Western Australia. It was all made possible with DPIRD and GRDC investment and the collaboration of 13 farming groups; including the Facey, Liebe, Mingenew-Irwin groups and WANTFA.
Links promised in the podcast

Listen to the Regional Update here.
Subscribe to the WeedSmart Whip Around here.
The WeedSmart Big 6
AHRI insight on Martin Harries’ work.

Podcast Producer: Jessica Strauss
Podcast Hosts: Jessica Strauss, Peter Newman


Spray application advice & precautions for 2,4-D use

Today on the podcast we get into the details on getting spray application right with expert, Bill Campbell (pictured above). We also get an insight into the MCPA LVE shortage and what considerations you need to make for alternative weed control solutions with Nufarm National Technical Lead, André Sabeeney.
A handy guide on how to utilise water sensitive paper for spray coverage.
Bill is based in Geraldton and is a spray application specialist. He provides some tips and how to get spray application right.
As you’re probably aware, access to MCPA is in short supply, so there is a current warning to grain growers to be mindful that there could be damage caused to young cereal crops if 2,4-D is used as a direct replacement for MCPA LVEs. Nufarm National Technical Lead, André Sabeeney gets into the details of this.
Nufarm National Technical Lead, André Sabeeney
We also hosted a really great webinar last Friday – New chemistry – What’s new, what’s coming & how to keep them for longer with Greg Condon. If you missed watching it live – the recording is now available on our website.
Podcast Hosts: Jessica Strauss & Peter Newman
Podcast Producer: Jessica Strauss


New chemistry – what’s new, what’s coming & how to keep them for longer

There is a range of new pre and post-emergent herbicides coming to the market in the coming seasons which will broaden weed control options and use patterns.
As new chemistry becomes available it is crucial for all involved to protect the longevity of any new products and minimise the risk of resistance.
In this webinar, WeedSmart’s Southern Extension Agronomist Greg Condon will explore the opportunities these new herbicides provide growers and how we can protect these herbicides using the WeedSmart Big 6.


What role Group G herbicides are playing in farming systems

Today on the podcast we’re focusing on the use of pre-emergent herbicides and knockdowns, with a special focus on group Gs.
Associate Professor Dr Chris Preston from the University of Adelaide joins us to talk about how Group G herbicides fit into farming systems and what role they are playing as an increasingly popular tool to control weeds.
Dr Chris Preston, University of Adelaide.
We’ll also be catching up with Delta Ag Director and Farm Consultant, Tim Condon. Tim provides an overview of where the season is at, with a focus on the Southern region, including knockdowns and pre-emergent herbicides. We’ll also touch on controlling weeds along fencelines.
Delta Ag Director, Tim Condon.
If you’d like to check out our latest webinar “Know thy enemy – biology of our most problematic crop weeds with Dr Catherine Borger”, click here.
In this podcast, we advertise our webinar “New chemistry – What’s new, what’s coming & how to keep them for longer with Greg Condon”. You can now watch the recording of this webinar here.
And finally – our new resource on in-crop weeds is available here.
Podcast hosts: Jessica Strauss and Peter Newman


Know thy enemy – biology of our most problematic crop weeds with Dr Catherine Borger

These weeds cost growers $22.5 and $1.7 million per year, respectively. Understanding the ecology of these species is vital to developing a successful weed management plan.
A five-year GRDC project produced results on emergence patterns, seed bank persistence, seed shedding and competitive ability of great brome and barley grass, in Western Australia and South Australia (‘Seed bank ecology of emerging weeds’ UA00156).
The project found that three to four years seed set control was needed to remove a great brome or barley grass soil seed bank.
Great brome had high seed production in Western Australia and South Australia. Barley grass had much higher seed production in South Australia than Western Australia. Great brome grass and barley grass reduced crop yield, and in 2019, great brome at low to high densities reduced economic returns from a Mace wheat crop at Wongan Hills by $90-205/ha. Barley grass reduced economic returns of wheat by $67-138/ha.
Data on weed ecology and competitive ability was used to update a decision support tool; the Weed Seed Wizard (WSW).
The updated model was used to investigate harvest weed seed control (HWSC) as a potential management technique for great brome grass and barley grass.
The modelling indicated that harvest weed seed control is a valuable tool in the management of these species, even in the years where most weed seed is shed prior to harvest.
You can read Catherine’s paper here: Great brome and barley grass – modelling the long-term value of harvest weed seed control


Getting mixing right to avoid glugs & efficacy issues

Today’s podcast focuses on getting tank mixes right to avoid glugs and ensure they’re as effective as they can be.
Bayer Market Development Agronomy and Field Leader of Integrated Weed Management Australia, Craig White (who also has his own podcast here), talks to us about how to get mixing orders right to avoid glugs in tanks and to get the best tank-mix possible. We also hear about a new formulation of Sakura called Sakura Flow.
Bayer Market Development Agronomy and Field Leader of Integrated Weed Management Australia, Craig White
Nufarm Territory Manager for the Downs, Maranoa and South West Queensland, Malcolm Salisbury joins us on the podcast to provide an overview of some of the considerations that need to be made when mixing herbicides for the Northern Region. He also has some general tips on mixing too!
Nufarm Territory Manager for the Downs, Maranoa and South West Queensland, Malcolm Salisbury
We also talked about the new GRDC Common Weeds of Grain Cropping: The Ute Guide, which is available as a hard copy or digital manual, for the most key weeds impacting Australian farming systems. This national version replaces the former regional and seasonal weed ute guides. The new ute guide was a larger format and included descriptions and images of weed species through a range of growth stages. You can order your manual copy by ringing 1800 11 00 44 or emailing GroundCover
You can also check out our latest webinar recording – WeedSmart in HRZ – practical options for dealing with ryegrass here.
Handy links for getting mixing right
Bayer Tank Mixing Guide 
GRDC National Variety Trials – Another point we couldn’t fit into the podcast Mal wanted to share was on crop herbicide tolerance. From the NVT guide it states: “Within many broadacre crop species, cultivars have been found to vary in sensitivity to commonly used herbicides and tank mixes, thereby resulting in potential grain yield loss, and hence reduced farm profit. With funding from GRDC and State Government Agencies across Australia, a series of cultivar by herbicide tolerance trials are conducted annually. The trials aim to provide grain growers and advisers with information on cultivar sensitivity to commonly used in-crop herbicides and tank mixes for a range of crop species.”
Nufarm “Broadacre tank-mix guide”


WeedSmart in HRZ – practical options for dealing with ryegrass

Effective ryegrass control is becoming increasingly difficult in High Rainfall Zone farming
This webinar is designed to help growers and agronomists explore farming system-
based options to manage annual ryegrass populations in our cropping areas.
Grassroots Agronomy’s Greg Condon is a leading agronomist from Southern NSW, involved with the GRDC’s National WeedSmart project, which focuses on ‘the farmer calling the shots, not the weeds’. Greg will present options, (not just chemical) which HRZ growers could integrate into their farming systems to help manage difficult-to-control weeds.
This webinar is brought to you by Southern Farming Systems and the Grains Research Development Corporation and presented by WeedSmart.

Fact Sheet

Common weeds of grain cropping

GRDC's 'The Common Weeds of Grain Cropping – The Ute Guide' aims to help growers, advisers, researchers and students to identify the most common weeds of grain cropping systems in Australia.


Taking a closer look at Overwatch + post-em spraying tips

This week, we’re catching up with University of Adelaide weeds researcher, Dr Peter Boutsalis, to talk about the latest resistance testing results he’s collated, tips on post-em weed control and FMC’s new product, Overwatch.
We’re also going to hear from FMC Australasia R&D Manager, Geoff Robertson (pictured), to get the rundown their new product, Overwatch.
Overwatch has now received full registration in Australia and will be available for the 2021 winter crop season. This pre-emergent herbicide has shown to be effective at killing annual ryegrass, as well as other weeds such as silvergrass, sowthistle and more.
If you’d like to check out the webinars we spoke about on the podcast, you can do so here.


The future of chemical use in farming with Mark Congreve

Join WeedSmart’s Paul McIntosh and Shannen Barrett as they host ICAN’s Mark Congreve who discusses the future of chemical use in farming including market drivers, herbicide discovery, automation, future for glyphosate & paraquat and much more!


Crop Competition Q&A

Dr Gurjeet Gill & Dr Michael Widderick answer questions that may have cropped up for participants of Crop Competition 101.
They also provide a broader overview of the crop competition work being delivered by their respective teams.
If you haven’t registered to do our free Diversity Era course, Crop Competition 101 yet, you can do so here.

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