Black grass ute guide

This Arable Update describes the biology of small broomrape and initial data on control options including herbicides and their application timing.

Maize is one of the easiest crops to mechanically weed and levels of weed control comparable to herbicides can be achieved. Find out more about the options available and how they work in this maize update.

Growers are reminded to report any grass weeds that appear unfamiliar or could resemble black-grass (Alopecurus myosuroides). Early reporting remains one of our strongest tools for protecting the industry.

Watch the recording for a webinar with FAR Senior Field Officer Ben Harvey on managing herbicide resistance pre-autumn sowing, covering what is herbicide resistance and methods to reduce the risk of herbicide resistance.

Find out regional information on Fall armyworm as of April 4 2025.

Seed and Grain Readiness and Response Incorporated (“SGRR”) is a biosecurity entity for the arable sector. It was established in 2020 under the Government Industry Agreement for Biosecurity (GIA). It is currently collecting levies to cover the costs of the two biosecurity incursions, black grass and fall armyworm. 

This arable extra discusses trial results from the 2024 herbicide screening trial at Kowhai Farm in Lincoln, Canterbury. 

Check out the latest fall armyworm update here. 

Current status: FAW populations continue to develop across New Zealand. Northland awaits the third main moth flight of the season, with the key time for scouting and decision-making approaching. Maize grain and sweetcorn growers should be particularly vigilant during this period.

Fall armyworm numbers continue to rise as the season progresses, with the top half of Northland in particular beginning to see levels that would require chemical intervention. Read more in this week's update.