Published on 27/09/2022
Twinax Xtra is a new and improved formulation of Twinax, with a built-in adjuvant package designed for optimum uptake and improved activity.
Launched in 2020, it has several advantages over its predecessor, explains Paul Hassan, Syngenta technical services lead for NZ.
These include:
• Faster brown-out of susceptible grassweeds, reducing crop competition and protecting yield.
• Better efficacy, particularly under sub-optimal conditions compared to the older Twinax formulation.
• Improved tank mix compatibility.
“Importantly, it is also more convenient to use, with no need for an additional adjuvant; and it’s rainfast in just one hour,” Hassan adds.
The new formulation contains 50 g per litre pinoxaden (compared to standard Twinax containing 100 g per litre), combined with 12.5 g per litre cloquintocet-methyl (crop safener) so growers need to be aware of the need to double the use rate they used for the old Twinax formulation.
Registered for control of wild oats, annual ryegrass and phalaris species in wheat and barley, it is best applied to small grass weeds between the three-leaf growth stage and prior to the first node of the grass weed growth stages (GS 13-30).
Twinax Xtra should always be applied to actively growing grass weeds. If weeds are dormant or stressed by winter conditions, frost, drought or waterlogging, delay application until the weeds and crop are actively growing again.
Application rates are 500 ml/ha for wild oats, and 600 ml/ha for annual ryegrass and phalaris, Hassan says.
As with any new herbicide, the more attention to detail with application timing and technique, the better the result. And that’s not just in terms of agronomic performance but also herbicide resistance management.
Twinax Xtra is a Group 1 mode of action herbicide. To minimise the risk of resistance:
• Do not make more than one application of Twinax Xtra (or any other Group 1 herbicide) to the same crop in the same season.
• Rotate crops and alternate chemistry with a different (non-Group 1) mode of action.
• Treat weeds when small and use label rates.
• Always apply to actively growing grass weeds.
If growers suspect Group 1 herbicide resistance, the first thing to do is test plants and identify which products are available for use before finalising herbicide programmes, Hassan says.
“It also helps if you’re aware of the likely patterns of resistance development, so if poor performance from a herbicide is identified, an accurate assessment of the likely cause can be undertaken.”
For more detail, contact your Syngenta territory sales manager.