Fall armyworm identification fact sheet

Start checking maize crop maturity about three weeks prior to when you think you’ll be starting your silage harvest. Good quality maize silage is best made when whole plant dry matter is between 30-40%

This is the handout from a field day hosted by the Stobie family, Gordonton, Waikato on 4 February 2026.

Read information on scouting and the current black-grass situation in this January 2026 update.

Welcome to the revised 2025 version of  The drying and storage of grain and herbage seed, first published in 1999. The book comprises six chapters that cover grain characteristics and their reaction to climate, the importance of seed moisture, the drying system, the storage environment, storage pests and their control, and construction considerations. These have been edited and updated by FAR staff and independent experts from the original chapters written by the late Murray Hill.

A velvetleaf find in a paddock that has been ‘clean’ for seven years, is a clear reminder of how long this weed’s seed will remain viable.

This AIMI survey of maize growers provides details of the 2025 New Zealand maize grain and silage harvest, along with sowing intentions for the coming year.

A review of New Zealand’s fall armyworm surveillance network has confirmed that crop scouting is the most reliable and informative tool for understanding fall armyworm (FAW) activity. However, it also acknowledges that scouting is time consuming and that industry personnel struggle to keep up in the height of the season.

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.

Read the full arable industry code of conduct here. 

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.