Weed control in winter crops


The NSW DPI Weed Control in Winter Crops guide has undergone an extensive industry review by both growers and their advisors, finding that more than 90% of respondents highly rate the publication.

While the results of this review were extremely positive, it has also delayed the release of the guide for this year. From 2024, we aim to have this resource available in February, in time for the GRDC Updates and pre-sowing for the industry.

We hope you find the revamped guide valuable, and we welcome any feedback to improve the guide and make it more useful for you and your business.

What's new in 2023

To keep you up to date with what’s new from the agri-chemical companies in 2023, NSW DPI has produced the following list. This includes both new products and new use patterns of already registered herbicides.

Aptitude® Herbicide

Aptitude® (90 g/kg carfentrazone-ethyl + 375g/kg metribuzin) from FMC is a Group 14 + 5 early post-emergence herbicide for the control of certain broadleaf weeds in wheat, barley, oats and triticale. Aptitude® provides rapid burn-down of broadleaf weeds and is a useful rotation tool for areas with multi-herbicide resistance.

Boxer Gold® Herbicide

Boxer Gold® (800 g/L prosulfacarb + 120 g/L s-metolachlor) is a Group 15 pre-emergent herbicide from Syngenta. Boxer Gold® is now registered in barley, chickpea, faba bean, field pea, lentil, lupin, oats, triticale and wheat for the control of annual ryegrass, silver grass and some broadleaf weeds. The recent registration in oats and triticale will provide improved options to control annual grasses.

Callisto® Herbicide

Callisto® (480 g/L mesotrione) is a pre-emergent herbicide from Syngenta. Callisto® is a Group 27 (HPPD) inhibitor that forms a layer in the soil where it is readily absorbed by the roots of emerging broadleaf weeds, disrupting photosynthesis. Callisto® is now registered in barley, oats, triticale and wheat to control a wide range of broadleaf weeds. Callisto® is registered for pre-emergent and split application (post-sowing, pre-emergence) use patterns in knife-point and press-wheel seeding systems. Callisto® provides effective in-crop, residual control to manage multiple broadleaf weed germinations.


Dropzone® (500 g/L 2,4-D present as the dimethylamine and monomethylamine salts) is a Group 4 knockdown herbicide from Nufarm. Dropzone® is new 2,4-D technology with a range of benefits including spray droplet optimisation, increased speed of action, low odour in a non-volatile formulation. It is also registered for optical spot spraying.


CRUCIAL® (600 g/L glyphosate) is a Group 9 knockdown herbicide from Nufarm. It is a new triple salt and triple surfactant product with a high 600 g/L glyphosate loading. CRUCIAL® has pre-sowing, in-crop, over-the-top (OTT) and pre-harvest registrations. Pre-harvest uses for lupins, mustard, and various oilseeds have been recently added to the label.

Frequency® Herbicide

Frequency® (60 g/L topramezone) from BASF is a contact herbicide that provides excellent control of a wide range of broadleaf weeds, including hard-to-kill weeds such as fleabane and wild radish. It also offers suppression of wild oats in winter cereals. It is a new Group 27 chemistry with the flexibility to tailor tank-mix partners to suit the weed spectrum.


Galaxy® (75 g/L pyrasulfotole) from Nufarm is a Group 27 flexible tank mix partner for in-crop weed control. Galaxy’s® ideal mix partners include Nufarm bromoxynil 200, MCPA LVE 570, bromoxynil MCPA, Saracen®, and Archer® 750. Galaxy®, in a tank mix, offers control for hard-to-kill weeds such as wild radish,  sowthistle and wireweed.


Grindstone® (240 g/L aminopyralid) from ADAMA is a Group 4 herbicide. Grindstone® can be tank-mixed with various herbicides applied in fallow and post-emergent cereals. In the northern cropping zone, Grindstone® can be used as a flexible option for winter and summer broadleaf weed control, including climbing buckwheat and fleabane, with minimal effect on rotation crops.

Liberty® Herbicide

The Australian release of the LibertyLink® canola means Liberty® Herbicide (200 g/L glufosinate-ammonium) from BASF can now be sprayed over crops with this technology to enhance existing annual ryegrass management programs. Liberty® Herbicide introduces an extra mode of action (Group 10) for broadacre cropping.

Mateno® Complete

Mateno® Complete from Bayer (aclonifen 400 g/L + diflufenican 66 g/L + pyroxasulfone 100 g/L) combines 3 active ingredients from 3 chemical groups (32 + 15 + 12), including aclonifen, a new herbicide mode of action for Australia (Group 32). Mateno® Complete is now registered for early post-emergence use in barley, and has an expanded use pattern to include more grass and broadleaf weeds for both wheat and barley. Mateno® Complete can also be used IBS (incorporated by sowing) in both wheat and barley.


Saracen® (50 g/L florasulam) from Nufarm is the first straight florasulam (Group 2) product to be Australian registered. Saracen® is a flexible mixing partner for controlling a variety of broadleaf weeds in barley, wheat, oats, triticale and ryegrass pasture. It has excellent efficacy on volunteer pulses. It is registered for both in crop and fallow situations.

Sierra® Herbicide

Sierra® (160 g/L saflufenacil) is a Group 14 herbicide from ADAMA. It improves knockdown herbicide brownout and weed control before planting annual crops or commencing a fallow. Sierra® is also registered for optical spot-spray in fallow, pre-harvest in winter pulses, and weed management in established lucerne. Sierra® will be commercially available in June.

Terrain® Flow

Terrain® Flow (480 g/L flumioxazin) is a Group 14 flowable herbicide from Nufarm. Terrain® Flow offers residual control of broadleaf weeds and grasses in a range of broadacre crops including wheat, faba bean, lentil, chickpea, field pea and lucerne. The product has label additions for use in lentil, fallow and summer crops.

Valor® EZE

Valor® EZE (480 g/kg flumioxazin) is a Group 14 flowable herbicide from Sumitomo. It can be used as a pre-plant, burndown 'spike' with non-selective knockdown herbicides such as paraquat, glyphosate or diquat/paraquat mixtures. It is registered for this use in many crops, including some cereals and most pulses. It is also registered as a pre-emergent, residual herbicide in wheat (not durum).


Published: May 2023