Ultro® 900 WG
Ultro® a new mode of action (Group 23) for the pre-emergent control of annual ryegrass, barley grass and brome grass in winter pulses and fallow.
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Tim Pohlner discusses Ultro herbicide from ADAMA and its control of ryegrass -
Bevan Addison, MDM from ADAMA discusses Ultro herbicide and the effectiveness it has on ryegrass in lupins and canola. -
Market Development Manger, Bevan Addison is showcasing Ultro herbicide in a lupin trial -
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Ultro® 900 herbicide: A pre-emergent solution for the control of grass weeds
Ultro® 900 herbicide is a new mode of action (Group 23) for winter pulse growers looking for a residual pre-emergent solution to control annual ryegrass, barley grass and brome grass. Ultro 900 controls susceptible grass weeds shortly after germination limiting competition to the emerging crop.
The new herbicide mode of action gives pulse growers another option for managing resistant annual grasses. ADAMA promotes using Ultro in a mix-and-rotate strategy with herbicides from the alternative mode of action groups.
General Info
Ultro Herbicide At A Glance
✔ Unique mode of action
Ultro® provides a new mode of action, Group 23 (Group E), to control grass weeds in winter pulses and fallow, and to help manage herbicide resistance.
✔ Flexible application window
Ultro® is non-volatile and can be applied up to seven days before incorporation by sowing.
✔ Registered in all winter pulses and fallow
Ultro® is registered in broad beans, chickpeas, faba beans, field peas, lentils, lupins and vetch. Additionally, Ultro can be applied in winter fallow.
✔ Strong performance on problem grass weeds
Australian trials have confirmed that Ultro® provides robust control of annual ryegrass, barley grass and brome grass
✔ The compatible formulation for resistance management
Ultro® can be tank-mixed with a range of pre-emergent herbicides to utilise many different modes of action to control key annual grass weeds and/or broaden the weed spectrum. If annual grasses have emerged, tank mix Ultro with ADAMA Spraytop® 330 herbicide for knockdown control.
Application Information and Resources
Application Rate of Ultro
Ultro® is applied at 1.1-2.3 kg/ha, with the recommended rate varying according to pulse crop type, soil texture and weed pressure. In situations of high grass weed pressure, apply the higher rate of Ultro or in a tank mix with another mode of action for robust control and resistance management. Ultro may be applied at a lower rate in situations with lighter soil texture depending on grass weed pressure.
| Crop | Timing | Rate |
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| Chickpeas | IBS or PSPE | 1.1 kg/ha |
| Broad beans, faba beans, field peas, lentils or vetch | IBS | 1.1-1.7 kg/ha |
| Lupins | IBS | 1.1-2.3 kg/ha |
| Winter fallow | Before weed emergence | 1.1-2.3 kg/ha |
Application Volume of Ultro
Ground application
Apply as a medium spray quality or larger in an application volume of 50-150L water per hectare
Aerial application
Apply as a coarse spray quality or larger in a minimum application volume of 30L water per hectare
Solubility and movement in the soil
Ultro® is moderately mobile in soil due to its water solubility and low adsorption to organic matter. Compared to other registered pulse herbicides, Ultro requires less rainfall or soil moisture for incorporation, activation and weed control. Ultro® does not strongly bind to stubble. A thick layer of stubble may affect coverage and the ease/uniformity of soil incorporation
Further Reading
What crops are protected by Ultro?
Ultro is registered in broad beans, chickpeas, faba beans, field peas, lentils, lupins and vetch. Additionally, Ultro is registered for application in winter fallow.
What weeds does Ultro target?
Ultro® 900 WG herbicide from ADAMA introduces a new mode of action (Group 23) for the pre-emergent control of annual ryegrass, barley grass and brome grass in winter pulses and fallow.
Control annual grasses with Ultro® 900 WG
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HerbicideAshlyn Ridgway, Beverly WA"Great residual activity, certainly took pressure off the post em grass spray. Will be using more in future years" -
HerbicideJamie Wilson, North Adelaide SA"Ultro has provided a different active not currently used in rotation to control grasses only leaving broadleaf weeds to control and taking pressure off clethodim." -
HerbicideMatt Flint, Cunderin WA"It has helped us with managing grasses, particularly ryegrass is marginal conditions, particularly when the profile was drying out and where we have split germinations of lupins, the grass control has been excellent holding off multiple germinations of ryegrass."
Winter Pulse Herbicide Partners
Wipe-Out® Pro
Simanex® WG
Spraytop®
