On-farm maize research booklet

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.

Pre-emergence herbicides have been the mainstay of maize weed management. This Maize Update discusses factors affecting pre-emergence herbicide success including application timing, modes of action and soil interactions. 

Farmers face three levels of biosecurity risk; regional biosecurity incursion risk; border biosecurity, regional biosecurity and on-farm biosecurity. This Maize update discusses the importance of on-farm biosecurity, the one factor you have control over.

This Maize Update discusses key issues for consideration in the choice and establishment of over-winter cover crops, along with the results of a five-year trial at FAR’s Northern Crops Research Site which researched the potential for over-winter cover crops to suppress weeds in the following no-till maize grain crop.

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

This FAR Focus on maize weed management covers research on issues maize growers currently face, including; Herbicide resistance, problem weeds, herbicide options and on-farm biosecurity. 

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. 

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 (Spodoptera frugiperda) is a highly invasive plant pest first detected in New Zealand in February 2022. Fall armyworm (FAW) larvae can feed on over 350 plant species and in New Zealand, the crops at most risk are sweetcorn and maize. This update outlines the pest's biology and behaviour and provides tips for identifying and managing fall armyworm in maize and sweet corn crops.