Mix and rotate herbicides
Rotating buys you time, mixing buys you shots
- Mix two herbicides at full rates where possible
- Rotate between mixes, not just between individual herbicides
We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based on what we now know, is that mixing herbicides is even more effective than rotating between them. And combining the two messages is the best approach that growers and agronomists can take. What we mean by this is to mix two herbicides, both at full rates, and then rotate to another herbicide mix. Weeds find it easy to evolve resistance to simple, predictable weed control. Mix and rotate is neither simple nor predictable for the weeds.
The key takeaways:
- Rotate between herbicide modes of action.
- Mix different modes of action within the same herbicide mix or in consecutive applications.
- Always use full label rates.
- Incorporate multiple modes of action in a double knock e.g., glyphosate/Group 1/Group 2 knockdown followed by paraquat and Group 14 and pre-emergent herbicide.
- Test weeds for resistance to know what herbicides will and won’t work for you.
- In cotton systems, aim to target both grasses and broadleaf weeds using two non-glyphosate tactics in crop and two non-glyphosate tactics during the summer fallow, and always remove any survivors (2 + 2 & no survivors).
Articles
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News
When to mix and when to rotate
While rotating modes of action is relatively simple, mixing is much more complicated. Dr Chris Preston explains some of the potential risks involved. Read More...
News
WeedSmart Big 6 on medium to low rainfall farms in NSW and Victoria
Get started with the WeedSmart Big 6 tailored for the medium and low rainfall regions of Victoria and southern New South Wales. Read More...
News
Redefining fenceline weed control options
Some new herbicide registrations may help growers regain control and reduce the risk of herbicide-resistant weed seed moving into paddocks. Read More...
Case Study
Craig Bignell & Sarah Robinson, Broomehill, WA
The WeedSmart Big 6 is keeping weed numbers down and reducing the impact of herbicide resistance on the Bignell’s mixed farming enterprise. Read More...
Ask an Expert
Have we lost some key herbicides in the Northern region?
Dr Michael Widderick says the latest weed survey has uncovered increasing resistance to glyphosate, paraquat and 2,4-D in key weeds. Read More...
Case Study
Slarke family, Lake Grace WA
The Slarke family implement an integrated weed management program to minimise the impact of herbicide resistance on their farming business. Read More...
Ask an Expert
What are the options to manage glyphosate- and paraquat-resistant ryegrass?
Dr Roberto Busi, AHRI says annual ryegrass with resistance to both glyphosate and paraquat demands a change in fence line weed management. Read More...
News
New Group 14 herbicides expand broadleaf weed control options
The Group 14 [G] herbicides now on the market are helping growers rotate away from the imi chemistry that has been heavily used in pulses. Read More...
News
WeedSmart Big 6 on High rainfall farms in the Southern and Western regions
Get started with the WeedSmart Big 6 tailored for the high rainfall regions of Victoria, South Australia and Western Australia. Read More...
News
WeedSmart Big 6 on WA’s Low and Mid rainfall farms
Get started with the WeedSmart Big 6 tailored for the low and mid rainfall regions of Western Australia. Read More...
News
Rapid resistance testing and genomic herbicides
Rapid testing will revolutionise current practice and genomics research will likely lead to next-gen herbicides using RNAi technology. Read More...
Case Study
Jackson family, Gurley NSW
The 1700 ha family operation is based on a robust winter cropping program featuring wheat, barley, chickpea, canola and linseed to help keep weed numbers low and manage risk. Read More...
News
Measuring the value of weed control expenses
Chris Davey, WeedSmart's southern extension agronomist, suggests three ways to reassure yourself that a weed control tactic is worthwhile. Read More...
Ask an Expert
Can I take an integrated approach to summer fallow management?
The Big 6 still applies in the fallow phase to ensure you are building plenty of diversity into your weed management program. Read More...
News
Windrowing barley plus HWSC in the high rainfall zone
Windrowing barley and cutting as low as possible minimises weed seed shedding, so we capture the seed and pass it through the impact mills. Read More...
Case Study
Rhys Daniels, Capella Qld
The Daniels run a predominantly summer-cropping program and have many tactics in place to keep their weed numbers down. Read More...
News
Winter-planted sorghum and weedy oats
Research shows there are herbicide options available to manage weedy oats in sorghum planted in late winter. Read More...
Ask an Expert
Can annual ryegrass be beaten in the Northern region?
Scout paddocks and farm borders for incursions of annual ryegrass and be aware of biosecurity hazards like contract machinery and hay. Read More...
Ask an Expert
Does ambient temperature affect herbicide performance?
Applying herbicides outside the optimal temperature range is likely to contribute to a spray failure, even in susceptible populations. Read More...
News
Keep clear of paraquat-resistant fleabane
The lack of new broad-spectrum knockdown herbicide options means that we need to be working hard on other management tools. Read More...
News
Tackle weeds and herbicide resistance with the Big 6
Nutrien agronomists from across the country share their tips to help control crop weeds using the WeedSmart Big 6 strategy. Read More...
Ask an Expert
What is the value of fixed nitrogen for suppressing weeds?
Competition in crops after pulses is a major weed management benefit, and the direct weed control options in pulses have also improved. Read More...
News
Make every drop of herbicide count
The WeedSmart Big 6 provides growers and agronomists with key guideline principles to use when making critical decisions about weed control. Read More...
News
Plan your attack on the weed seed bank
Here we summarise the key components of the WeedSmart Big 6 strategies and the principles that underpin them. Read More...
Ask an Expert
How can I make the most of spring planning sessions?
Spring planning sessions are vitally important for growers and agronomists to keep ahead of weeds and herbicide resistance. Read More...
News
Reining in FTR with cultivation and competition
Since introducing this strategic cultivation regime, the Daniels have not had a problem managing feathertop Rhodes grass. Read More...
News
Resistant ryegrass challenges disc seeding systems
With limited pre-emergence herbicide options registered for use with disc seeders, growers must implement other weed control strategies. Read More...
News
Power of crop rotation to combat herbicide resistance
It only takes one resistant plant to break an effective herbicide if selection pressure is high, and survivors set seed. Read More...
News
Expanded options for spot sprayers
The spread of difficult-to-control weeds into is behind the increasing adoption of optical spot spraying technologies across Australia. Read More...
News
WeedSmart Big 6 on Mid North, Yorke Peninsula and Lower Eyre Peninsula farms
Get started with the WeedSmart Big 6 tailored for the Mid-North, YP and lower EP region of South Australia. Read More...
News
Investigating the role of competitive wheat against three northern region weeds
Weed ecology highlights integrated weed management tactics for common sowthistle, Mexican poppy and turnipweed in the northern grains region. Read More...
News
We can’t afford to lose older chemistries
The Linklaters used crop rotation to overcome a brome grass infestation to expand their herbicide options. Read More...
Ask an Expert
Are we gaining ground against herbicide resistant weeds?
Random weed surveys show an upward trajectory in the percentage of samples with resistance to a suite of common herbicides. Read More...
News
Stop ryegrass in its tracks: First step is to prevent seed set
Bec and Ash Marshall have seen the benefits of resistance testing and implementing tactics that drive down weed numbers fast. Read More...
Ask an Expert
How can I strengthen the pulse phase to combat weeds?
Many herbicide-tolerant pulse varieties are very specific in their tolerance to different active ingredients, even from the same mode of action group. Read More...
Ask an Expert
How can I use the WeedSmart Big 6 to keep old chemistry working?
Any herbicide program that relies heavily on one or two herbicide modes of action for a target weed is bound to fail eventually. Read More...
Case Study
Michael Nichols, Sisters Creek, Tas
When herbicide resistant annual ryegrass arrived on their farm Michael Nichols knew he needed to prevent a ‘stop farming’ event. Read More...
Ask an Expert
How does crop competition support other weed control tactics?
Crop competition is a quiet achiever in weed control that also has a synergistic effect when applied with other tactics. Read More...
News
Testing for herbicide susceptibility and resistance
Testing weeds for herbicide susceptibility and resistance can save growers thousands of dollars, making the investment of a few hundred in testing very worthwhile. Read More...
News
Velocity resistance flags the value of herbicide resistance testing pre-harvest
High-level resistance to Velocity is confirmed in wild radish. Test survivor weeds this season. Read More...
Ask an Expert
How can I gain more spray efficiency?
Filling systems can allow the operator to slow down their ground speed and apply the spray more effectively. Read More...
News
Maximising the benefits of new pre-em chemistry
New pre-emergent herbicides on the market give growers more options for mixing and rotating modes of action. Read More...
Ask an Expert
New herbicide helps pulse growers tackle resistant grass weeds
The commercial release of Ultro® (carbetamide) brings a completely different mode of action into the weed control program for pulses. Read More...
News
Double down on the double break in the high rainfall zone
A long-term trial at Lake Bolac demonstrated the strategies that control ryegrass in high rainfall zone cropping systems. Read More...
Ask an Expert
What can I do to control large FTR grass in fallow?
Feathertop Rhodes grass is a major weed in chemical fallows in Australia, and is notoriously hard to kill with glyphosate, but there are other options. Read More...
News
Testing informs herbicide choice
Herbicide resistance resistance testing proved useful even on a property where there had been limited use of herbicides. Read More...
News
Safe sorghum planting while controlling weeds
Changes to the label use patterns and the launch of a new seed safener product can expand the usefulness of S-metolachlor in sorghum. Read More...
Ask an Expert
Can pulse cover crops tackle multi-resistant ryegrass in irrigated systems?
Field pea provides an effective winter fallow clean to manage resistant ryegrass ahead of planting rice or wheat. Read More...
Case Study
Jamie and Susie Grant, Jimbour Qld
Proactive use of automated optical weed detection technology, allows continuous spraying and treating smaller and smaller weeds. Read More...
Case Study
Peter and Kylie Bach, Pittsworth Qld
Peter and Kylie Bach are using crops to compete with weeds throughout the year, aiming for 130% utilisation of their cropping land. Read More...
Ask an Expert
How can I set up my summer crops to help manage weeds?
It pays to plan ahead to manage weeds in winter fallows destined from summer crops – such as cotton, sorghum, mungbean and sunflower. Read More...
Ask an Expert
What strategies will rein in wild turnip in the northern region?
Wild turnip steals crop yield and requires additional control measures that together cost over $10 million every year across Australia. Read More...
News
Advances made in weed recognition technologies
Australian researchers are developing technologies that will deliver ‘green-on-green’ weed recognition and targeted control in-crop. Read More...
Ask an Expert
What impact does dry seeding have on pre-emergent herbicide efficacy?
When dry seeding, it is essential that the maximum amount of pre-emergent product reaches the soil surface. Read More...
Ask an Expert
How can I maximise grass weed control using hybrid canola?
For a competitive canola crop to halve grass weed seed set, use a vigorous variety, robust pre-em herbicide and the best agronomic package. Read More...
Case Study
Single family, Coonamble NSW
The Singles gain good weed control year round using crops and fallow in both winter and summer on their farm near Coonamble. Read More...
Ask an Expert
How can I ensure my complex tank mix is compatible and will spray out?
Having many products in a tank mix, makes it increasingly difficult to prevent adverse chemical reactions from occurring in the ‘brew’. Read More...
News
Mix up your approach to fenceline weeds
Glyphosate resistance can, and does, quietly build up in a wide variety of weed species growing in non-production areas, like fencelines. Read More...
Ask an Expert
What are the best herbicide mixing strategies for winter crops?
There is strong scientific evidence for the value of mixing pre-emergent herbicides, provided all the necessary precautions are met. Read More...
Case Study
Jason Rogers, Moree NSW
Keeping weed numbers down, managing patches and minimising weed seed set has been a high priority for Jason Rogers, Moree. Read More...
News
Resistance amplifies glyphosate + 2,4-D tank mix survival rate
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Ask an Expert
How can I be certain that herbicide residues in the soil have fully degraded at planting?
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Case Study
Andrew Kenny, Badgingarra WA
Andrew and Gina Kenny (Badgingarra, WA) use an integrated program of crop rotation, mouldboard ploughing, grazing and chaff lining to keep their weed numbers low. Read More...
Article
Post emergent herbicides
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Article
Increase pre-em efficacy through a mix and rotate strategy
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Case Study
Tim Rethus, Horsham Vic
Wimmera grower Tim Rethus and his family are taking an integrated approach to the weed management with a strong focus on weed-free crops. Read More...
Case Study
Trevor Syme, Bolgart WA
Trevor and Renae Syme are throwing everything they’ve got at revamping non-wetting sands and driving down weed numbers on their property at Bolgart, WA. Read More...
News
Efficient herbicide use pays off
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Ask an Expert
How does mixing herbicide MOAs buy more shots?
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Ask an Expert
Stewardship of synthetic auxin herbicides
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
News
Surveys highlight the cross-resistance to herbicides
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Ask an Expert
How can I avoid sub-lethal dosing when spraying weeds?
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Case Study
Curry family – Junee, NSW
A desire to minimise the build-up of herbicide-resistant weeds on their Junee property in southern NSW is a driving force behind the Curry family farming operation. Read More...
News
IMI-tolerant crops – use sparingly and to best effect
Since the Clearfield technology was commercialised in 1992, plant breeders have developed the range of imi-tolerant summer and winter crops. Read More...
Case Study
Mark Sandow, SA
Herbicide-resistant annual ryegrass has been an ongoing challenge for grain producers in the Mintaro area of South Australia since the 1980s. Read More...
News
Dual trait herbicide tolerance extends IWM options
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Case Study
Colin McAlpine, WA
Colin has thrown everything he can at reducing the weed burden on his farm while taking all precautions to protect the available herbicide modes of action. Read More...
News
Can we grow broadleaf crops without clethodim?
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Case Study
Greg Martin, VIC
Greg Martin believes resistance had evolved due to a lack in rotation of chemical groups and not enough importance given to controlling survivors. Read More...
Case Study
Grant Wilson, VIC
The Wilson’s use a conservative rotation with up to one-third of the farm under vetch or fallow at any one time. Read More...
Podcasts
View all
Podcast
S09E06: Pre-emergent options and a resistance update
Bevan Addison from Adama talks pre-em options including Tenet and Ultro, and Mechelle Owen gives the latest on herbicide resistance surveys. Read More...
Podcast
S09E04: Management strategies for glyphosate resistant weeds
Dr Chris Preston and agronomist David Strahorn talk about the current state and strategies of glyphosate resistance. Read More...
Podcast
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...
Podcast
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...
Podcast
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...
Podcast
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...
Podcast
S08E06: Glyphosate resistance update and tips on pre-em herbicide use
On this podcast WA grower Greg Curnow talks about how he tackled glyphosate resistant ryegrass Dr Chris Preston provides tips on pre-emergent herbicide use. Read More...
Podcast
S07E22: Regional Update – Marty Chandler, Nutrien Agronomist, Lower EP
Nutrien Cummins Ag Agronomist, Marty Chandler, provides an overview on how harvest is playing out for those on the Lower Eyre Peninsula in South Australia. Read More...
Podcast
S07E13: Tackling brome and ryegrass in the Mallee at WeedSmart Week Mildura
In this podcast episode, we hear from some of the presenters for WeedSmart Week Mildura, as well as learn about the weed issues in the Mallee. Read More...
Podcast
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...
Podcast
S07E09: How smart phase farming can increase yield and a resistance status update
On this podcast, find out about the benefits of smart phase farming and we also get a resistance status update. Read More...
Podcast
S07E02: Farmers facing price and supply crunch to kill weeds
We discuss the stewardship around Adama's new pre-emergent herbicide, Ultro, and comment on the ongoing supply issues of herbicides and fertilisers. Read More...
Podcast
S07E01: Controlling weeds in the Liverpool Plains after widespread flooding
The WeedSmart Podcast is back! This is our first episode of 2022. This podcast is a Regional update with Jim Hunt who is an Agronomist with Hunt Ag Solutions in Gunnedah, NSW. Read More...
Podcast
S06E39: Getting residual herbicides right after harvest
We discuss how to best use residual herbicides after harvest, how using an optical spray can maximise your use of residual herbicides, and crop topping. Read More...
Podcast
S06E31: Grazing resistant ryegrass key to weed control success for Scholz family
Murray and Emma Scholz are having a real win with grazing to keep ryegrass at bay. Peter Boutsalis provides an update on clethodim resistance and shares some practical tips on how to keep on top of ryegrass. Read More...
Podcast
S06E25: With a 450,000 ha cotton crop predicted, getting weed control right counts
On this podcast, we chat to the Northern Grower Alliance CEO, Richard Daniel about some surprising survey results on optical spraying. Read More...
Podcast
S06E17: Group G tips and lucerne as a fence line weed control tool
We've got new info on Group Gs and nitrogen placement. Also, have you thought about growing a crop to compete with weeds in non-cropped areas? Read More...
Podcast
S06E13: Benefits of continuous spraying when weeds are small and Terrad’or explainer
On this podcast we look at good spraying practice with WA farmer Tim Critch learn about Nufarm's new Group G herbicide, Terrad'or. Read More...
Podcast
S06E11: Lupins will benefit from new addition of Reflex in weed control tool kit
In this episode we get the details on the stewardship of Syngenta's new product, Reflex. With so many new products hitting the market and plenty more in the pipeline, it’s beneficial to find out the details about these new products and how they might fit into farming systems. Read More...
Podcast
Grazing and baling chaff dumps and Mateno Complete overview
Grazing and baling chaff dumps and Mateno Complete overview. Today on the podcast we chat with WA farmer Clayton South about his experience with grazing chaff dumps. We also hear from Bayer’s Australian Field Leader of Integrated Weed Management, Craig White about their new herbicide product “Mateno Complete” and how to use it effectively and sustainably in your farming system. Read More...
Podcast
Epic focus paddock results & using S-Metolachlor effectively
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Podcast
What role Group G herbicides are playing in farming systems
This episode focuses on the use of pre-emergent herbicides and knockdowns, with a special focus on group Gs. Read More...
Podcast
Getting mixing right to avoid glugs & efficacy issues
This episode focuses on getting tank mixes right to avoid glugs and ensure they’re as effective as they can be. Read More...
Podcast
S05E04: Research is showing that mixing herbicides is the way to go
AHRI researcher Roberto Busi talks about resistance in wild radish and annual ryegrass and why it’s so important to mix and rotate herbicides on the podcast. Read More...
Podcast
Our new Diversity Era course ‘Pre-emergent Herbicides 101’ is now live
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Case Studies
View all
Case Study
Craig Bignell & Sarah Robinson, Broomehill, WA
The WeedSmart Big 6 is keeping weed numbers down and reducing the impact of herbicide resistance on the Bignell’s mixed farming enterprise. Read More...
Case Study
Slarke family, Lake Grace WA
The Slarke family implement an integrated weed management program to minimise the impact of herbicide resistance on their farming business. Read More...
Case Study
Jackson family, Gurley NSW
The 1700 ha family operation is based on a robust winter cropping program featuring wheat, barley, chickpea, canola and linseed to help keep weed numbers low and manage risk. Read More...
Case Study
Rhys Daniels, Capella Qld
The Daniels run a predominantly summer-cropping program and have many tactics in place to keep their weed numbers down. Read More...
Case Study
Michael Nichols, Sisters Creek, Tas
When herbicide resistant annual ryegrass arrived on their farm Michael Nichols knew he needed to prevent a ‘stop farming’ event. Read More...
Case Study
Jamie and Susie Grant, Jimbour Qld
Proactive use of automated optical weed detection technology, allows continuous spraying and treating smaller and smaller weeds. Read More...
Case Study
Peter and Kylie Bach, Pittsworth Qld
Peter and Kylie Bach are using crops to compete with weeds throughout the year, aiming for 130% utilisation of their cropping land. Read More...
Case Study
Single family, Coonamble NSW
The Singles gain good weed control year round using crops and fallow in both winter and summer on their farm near Coonamble. Read More...
Case Study
Jason Rogers, Moree NSW
Keeping weed numbers down, managing patches and minimising weed seed set has been a high priority for Jason Rogers, Moree. Read More...
Case Study
Andrew Kenny, Badgingarra WA
Andrew and Gina Kenny (Badgingarra, WA) use an integrated program of crop rotation, mouldboard ploughing, grazing and chaff lining to keep their weed numbers low. Read More...
Case Study
Tim Rethus, Horsham Vic
Wimmera grower Tim Rethus and his family are taking an integrated approach to the weed management with a strong focus on weed-free crops. Read More...
Case Study
Trevor Syme, Bolgart WA
Trevor and Renae Syme are throwing everything they’ve got at revamping non-wetting sands and driving down weed numbers on their property at Bolgart, WA. Read More...
Case Study
Curry family – Junee, NSW
A desire to minimise the build-up of herbicide-resistant weeds on their Junee property in southern NSW is a driving force behind the Curry family farming operation. Read More...
Case Study
Mark Sandow, SA
Herbicide-resistant annual ryegrass has been an ongoing challenge for grain producers in the Mintaro area of South Australia since the 1980s. Read More...
Case Study
Colin McAlpine, WA
Colin has thrown everything he can at reducing the weed burden on his farm while taking all precautions to protect the available herbicide modes of action. Read More...
Case Study
Greg Martin, VIC
Greg Martin believes resistance had evolved due to a lack in rotation of chemical groups and not enough importance given to controlling survivors. Read More...
Case Study
Grant Wilson, VIC
The Wilson’s use a conservative rotation with up to one-third of the farm under vetch or fallow at any one time. Read More...
Videos
View all
Webinar
Combating resistant annual ryegrass in northern farming systems
In this webinar, we discuss the practical strategies to prevent and manage incursions of resistant annual ryegrass populations in northern cropping systems. Read More...
Webinar
The fate of herbicide residues in soil – why it matters and what research is telling us
Learn about the effect herbicide residues may have on soil microbial activity and on the establishment and growth of crops following the fallow, even after the plant back period. Read More...
Webinar
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...
Webinar
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...
Webinar
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...
Webinar
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. Read More...
Webinar
S-Metolachlor usage in the northern region
WeedSmart's Paul McIntosh and Syngenta Field Biology Manager Rob Battaglia discuss how S-metolachlor works, its efficacy, and what potential resistance problems might be around the corner. Read More...
Video
Get out there and take a resistance test this harvest!
In this WeedSmart Shorts video, Western Extension Agronomist Peter Newman and Southern Extension Agronomist Chris Davey explain the differences between random and selected resistance testing results. They also explain why it's important to get resistance testing done and provide an update on the latest resistance survey data. Read More...
Video
Herbicide resistant hot-spots revealed in the most recent ryegrass survey
Professor Chris Preston explains where the herbicide resistant hot-spots are for herbicide resistance in ryegrass and provides some sage advice around how to get the most out of old and new chemistries. Read More...
Video
Rod Birch on how the Big 6 is keeping weeds at bay at Catalina Farms
Rod Birch (Coorow, WA) gives an overview of what Big 6 principles are working for them. He also explas how they're approaching weed control at new property acquisition, 'Koobabbie', which hadn't changed hands for 115 years. Read More...
Video
WeedSmart Week Forum Day Videos
Watch all the videos from our Esperance WeedSmart Week Forum Day! Read More...
Webinar
Considerations for pre-emergent herbicides with dry sowing
Join Chris Davey, YPAG and WeedSmart Extension Agronomist and Mark Congreve, ICAN Senior Agronomist as they assess the sowing issues in South Australia and discuss strategies on using pre-emergents. Read More...
Webinar
Farmer questions answered on Group G herbicides and optimum application temperature
In this follow-up to last year's webinar on Group Gs, Dr Chris Preston, University of Adelaide, Professor of Weed Management and WeedSmart's Greg Condon focus on farmer questions around Group G herbicide use. Read More...
Webinar
How to make the right decision on using Group Gs in the North
We ask Andrew Somervaille to explain Group G use in both systems and the most optimum use of different Group G products given the range of seasonal conditions in the northern cropping region. Read More...
Webinar
How do I make the right decision on using Group Gs?
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Video
Double breaks – a double shot at annual ryegrass
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Webinar
Testing all of your herbicides for resistance with Roberto Busi
Roberto discusses the current levels of resistance to knock-down herbicides (glyphosate and paraquat), new and old pre-emergent herbicides, and clethodim. Read More...
Webinar
Glyphosate Resistance Update with Peter Boutsalis
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Webinar
You don’t know what you don’t know about managing weeds
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Webinar
New chemistry – what’s new, what’s coming & how to keep them for longer
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Webinar
WeedSmart in HRZ – practical options for dealing with ryegrass
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Video
Increase pre-em efficacy through a mix and rotate strategy
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Video
Post emergent herbicides
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...
Fact Sheets
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Fact Sheet
Soil behaviour of pre-emergent herbicides in Australian farming systems
A reference manual covering the factors influencing the performance and break down of pre-emergent herbicides in soil. Read More...
Fact Sheet
Control barley grass in LRZ farming systems
Barley grass in Southern and Western regions requires 3 to 4 years of seed set control to run down the weed seed bank. Read More...
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...
Fact Sheet
Wild radish factsheet
Growers are adopting diverse and integrated control strategies to manage herbicide resistant wild radish populations. Read More...
Fact Sheet
Northern IWM factsheet – common sowthistle
Understand the ecology of common sowthistle and effective management tactics. Read More...
Fact Sheet
Windmill grass – Northern Region
Understand the ecology and effective management tactics to better manage this key weed. Read More...
Fact Sheet
Alternative herbicides for management of Group A herbicide-resistant barley grass in field pea
Control of Group A herbicide-resistant barley grass in field peas can be difficult. This factsheet outlines alternative herbicide options. Read More...
Fact Sheet
Stewardship First SprayBest Guide
Rotating buys you time, mixing buys you shots Mix two herbicides at full rates where possible Rotate between mixes, not just between individual herbicides We have made a big fuss in the past over rotating between herbicides from one year to the next. This is still a good message, but an even better message, based […]...