New Luximax herbicide is a breakthrough in annual ryegrass control as it will match leading industry standards of control whilst equipping Australian growers with the first unique mode of action in a generation.
This unique mode of action offers more options for chemical rotation without sacrificing control. Luximax strengthens existing integrated weed management strategies and provides up to 12 weeks’ residual control of ryegrass – including biotypes resistant to existing herbicide modes of action groups such as Groups D, J and K.
Luximo® is the active ingredient powering this new pre-emergent herbicide which will be available in an emulsifiable concentrate (EC) formulation with a high active loading. This high loading will make Luximax effective at low application rates.
Mode of action
Luximax is the only herbicide in a class of chemistry known as the cineoles. Its novel mode of action is based on inhibition of fatty acid thioesterase (FAT), which irreversibly disrupts cell membranes and damages emerging plant tissue. In pre-emergence treatments, ryegrass seedlings quickly become unable to survive and grow.
This unique mode of action means the molecule has no known cross-resistance and will play an integral role in maintaining the effectiveness of integrated weed control programs. For resistance management purposes, Luximax is currently classified as a Group Z.
Luximax should be incorporated by sowing (IBS) using knife points and press wheels within 3 days of application. To ensure necessary separation of the seed from the herbicide treated band, sowing depth should be a minimum of 3 cm. Sufficient rainfall is then required within 10 days of application for reliable activation.
Trials have shown that Luximax provides up to 12 weeks’ residual control of annual ryegrass, which matches the benchmark set by the current leading pre-emergent products.
Consistency across varying conditions
Recent experience has shown that herbicide solubility plays an important role in the effective incorporation and activation of pre-emergent herbicides. Luximax has a good balance of solubility and soil binding, and in development trials has achieved more consistent results across different autumn conditions when compared to some other pre-emergent cereal herbicides.
Luximax has limited persistence in the soil compared to other pre-emergent herbicides, so it has favourable plantbacks that provide plenty of flexibility in managing crop rotations. Application-to-sowing intervals are typically 9 months for winter crops and 3 months for summer crops.
Stubble and weed cover management
As with other pre-emergent herbicides, applying Luximax where the stubble coverage or ground cover from weeds is over 50% could adversely affect weed control.
Integrated Weed Management (IWM)
While Luximax will control annual ryegrass that has developed resistance to herbicides from Group K and other mode of action groups, it should always be used as part of an integrated weed management (IWM) strategy. Such strategies will include non-chemical methods as well as herbicides with different modes of action.