Improved weed control in coastal NSW grain production

Improved weed control in coastal NSW grain production

The northern NSW coastal grain production region has been identified as an area where increased grain production is a targeted objective. This region is characterised as a high rainfall farming system, typically beef cattle + grain, or sugarcane + grain cropping.

As growers’ transition into increased grain production, any negative experiences due to wrong agronomic decision making is likely to have significant and lasting consequences on further adoption of a grains rich farming system.

Weeds are a major constraint to productivity in this area and failure to employ the latest knowledge and technology can have significant impacts across the entire farming system. Issues such as herbicide resistance and crop injury due to herbicide carryover have been highlighted as issues impacting grain production, while other concerns related to identification of emerging weeds, best practice spray application and drift management are also important to growers.

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GRDC has identified the need for enhanced extension in weed management in this region. ICAN will lead a 30 month project to assist local growers in upskilling their weed management knowledge and decision making via a diverse range of extension pathways.

⇩ Workshops & seminars ⇩ Herbicide resistance testing ⇩ Extension resources

Coastal weeds workshops and seminars

Over the course of the project, ICAN will be hosting a series of 1-day workshops and extension seminars designed to provide grain growers with the latest information on weed management and control tactics.

2022 Coastal Pre-Emergent Herbicide Workshop

Save the date! Pre-emergent herbicide workshops will be run in week commencing 18 July - more details available soon

Webinar on coastal weeds

In May 2022, a webinar was run for coastal growers and advisers on coastal weed management. A recording of the webinar is available below.

2021 Coastal Post-Emergent Herbicide workshop

In 2021 a series of 1-day workshops on post emergent herbicides were held. Notes available below

GRDC coastal weeds workshop notes, November 2021 (post emergent herbicides)

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Herbicide resistance testing for grain crops in northern coastal NSW

Grain growers on the north coast of NSW have the opportunity to have key priority weeds screened for potential herbicide resistance as part of a new GRDC weeds project. Participation in this program helps generate an industry view of the types and level of herbicide resistance present in the coastal NSW farming system, while also providing individual growers with a report on herbicide resistance for their paddock/weed of concern.

Available resources for resistance testing are limited, so interested growers are invited to register their interest by completing the form by clicking on the pdf link below.

CSU Resistance testing form

The Charles Stuart University herbicide resistance testing team plan to undertake a field trip in late summer to collect the bulk of weed seed samples. This will be coordinated just prior to summer crop harvest, when weed seeds are mature.

Growers / agronomists who want to have a field included in the survey can chose to either have the CSU team undertake sample collection; or collect their own seed should their harvest time not align with the CSU district collection.

If collecting your own seed:

  1. Collect at least 1 cup full of clean weed seed (more for species with large seeds or pods) either from screenings on your header or from plants randomly throughout the paddock. An A4 envelope full of seed heads will also be sufficient. Insufficient seed will reduce the number of herbicides that can be tested. Only include weed seeds from a single paddock as results may vary. Only 1 weed species per envelope. NOTE: More seed collected the better.
  2. Place each sample in a sealed paper bag. Print out and complete all sections of the form on this page and place the seed sample and identification form in an envelope.
  3. Mail samples as soon as possible to avoid seed deterioration.
  4. Address to Herbicide Resistance Testing, School of Agricultural and Wine Sciences, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW, 2678.

For further information contact: John Broster Phone: 02 6933 4001 Mobile: 0457 272 075 Email:

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Extension resources

Over the course of this project, this page will be updated with weed management resources applicable to coastal grains production.