S-Metolachlor usage in the northern region
In this WeedSmart webinar, we talk to WeedSmart northern extension agronomist Paul McIntosh and Syngenta’s Field Biology Manager Rob Battaglia about how S-Metolachlor (Dual Gold) works, its efficacy, and what potential resistance problems might be around the corner. They explain what tactics growers should adopt to reduce potential resistance problems on this key grass weed herbicide, referring to the WeedSmart Big 6.
Topics covered include:
Application considerations for maximum efficacy
Effect of stubble
Herbicide binding characteristics
Herbicide safener “EPIVIO-C”
Detect, then spray
For the past few years John Single and his son Tony have been using the air-borne weed sensor, Single Shot, developed by John’s other son Ben, to rapidly detect and map weeds on their dryland cropping property, Narratigah, near Coonamble, NSW. Read more here.
Optical spray has a good fit in CQ
CQ grain grower Kurt Mayne bought a weedIT boom in 2019 and has been impressed with the benefits that have come with the addition of an optical sprayer to their weed control program. Find out more here.
Season long control with crop competition
The Singles consider crop competition to be their #1 weed control tactic, simply because it is the only one that provides season-long in-crop weed control. Read the case study.
Farming moisture : Beating weeds
Across the 4500 ha cropping area at ‘Narratigah’, the weed numbers are low as a result of the Single’s ‘farming moisture’ philosophy, which involves planting whenever there is sufficient subsoil moisture to establish a competitive crop on their heavy clay soils. Read the case study here.
Soil health produces more crop, less weeds
When constraints like soil acidity are addressed, crops are more competitive against weeds. Read more here.
Mechanical desiccation of mungbeans
Mungbean growers are interested in the possibility of using mechanical methods to desiccate crops prior to harvest – there’s a lot to learn yet but Lindsay Evans has given it a go and expects there to be a weed control spin-off benefit. Read more here.
Herbicide resistant hot-spots revealed in the most recent ryegrass survey
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.
Can intercropping help with weed management?
This WeedSmart webinar outlines the principles of mixing different crops together, and how intercropping may provide weed management options for growers.
Dr Andrew Fletcher is a farming systems scientist at CSIRO who is passionate about the emerging role of diverse cropping systems. He is joined by WeedSmart southern extension agronomist, Greg Condon.
Topics covered include:
Characteristics of intercropping and companion cropping
Australian intercropping data
Canadian intercropping data
Implications for weed management
Examples of in-paddock applications
Peter Bach – Stripper front and chaff deck
Aiming for 130 per cent utilisation of their cropping land through the year, Peter and Kylie Bach have developed a farming system that extracts full value from barley stubble and minimises weed pressure.
Read the full case study article.
Mixed farming – does it really help control resistant weeds?
In this webinar, WeedSmart Southern extension agronomist Greg Condon looks at the mixed farming system and explains how the Big 6 principles encourage diverse weed management. Greg focuses on solutions in the medium rainfall zone whilst grower and agronomist Craig Drum focuses on the high rainfall zone.
Both Greg and Craig share real-life examples of clients who successfully controlled resistant weeds by using a mixed farming system, whilst remaining profitable.
Topics covered include:
What the WeedSmart Big 6 looks like in a mixed farming system
How to be profitable whilst reducing the seedbank of resistant weeds
Harvest Weed Seed Control opportunities: baled chaff, chafflines
4 examples of clients who successfully controlled their resistant weeds using mixed farming
Rod Birch on how the Big 6 is keeping weeds at bay at Catalina Farms
Catalina Farms is approximately 13,000 ha of 100% cropping, with 65% wheat, with the other 35% comprising of 20% canola and 15% lupins. The longterm rainfall is about 330ml per year and around 250-280ml of growing season rainfall.
Taking on a new property usually has its challenges, but there can be upsides too. Some of the challenges at Koobabbie were related to the fact it had been a livestock property and cropping machinery had never having been run through it. However, Rod explained that they have had some great news about the herbicides they are able to use.
Through the University of Western Australia’s resistance testing service, run by Dr Roberto Busi at AHRI, they found out some older chemistries were still effective, which was a pleasant surprise. Daniel Birch explains below in the Regional Update Podcast what they found out and how they used this information in their planning.
1:10 Crop rotations – Rod’s favourite rotation is Lupins – wheat – canola – wheat. It provides a lot of diversity for Modes of Action, as well as allows for nitrogen to go back into the soil through the lupin phase.
2:10 Crop Competition – the Birches are big fans of crop competition and it’s an essential part of their approach to controlling weeds.
3:00 Double knock – conditions haven’t been suitable for a double knock since 2016, but when the opportunity arises, it’s an important tool.
4:21 Mix and rotate herbicides – the crop rotations used at Catalina allow for really diverse chemical groups to be used, which is a great tactic to keep resistance at bay.
5:52 Stopping weed seed set – the Birches are trying to eliminate as many weeds in the crop as possible. Crop topping is a tool that they employ, as well as late spraying where necessary.
6:49 Harvest weed seed control – seed destruction is on the horizon at Catalina, but logistically has been a bit tricky.
7:21 Acquiring Koobabbie – it has been exciting for the Birches to be able to introduce more diverse rotations. They’ve been able to use Modes of Action which have never been used before.
9:48 Soil amelioration – liming has been a really beneficial tool for Catalina Farms. They also put out pot ash and gypsum. Deep ripping has also been a great tool to remove the compaction layer.
11:29 Big 6 benefits – controlling weeds is such an important strategy at Catalina Farms. Rod Birch said “We’ll never have a ceasefire on the war on weeds!”.