A female farmer remains in a serious but stable condition at Hawke's Bay Hospital after a quad bike accident near Wanstead on Tuesday.
The Lowe Corporation Rescue Helicopter flew the injured woman to hospital about midday, after her quad bike rolled on a property south of Waipukurau.
The accident coincides with the release of findings from the Department of Labour's blitz "Harm Reduction" campaign that targeted quad bike safety for the last 10 weeks.
Nationwide, 117 warning or improvement notices were issued after 376 farms were visited.
In Hawke's Bay, 40 farms were visited and one notice was issued.
Department of Labour health and safety chief adviser Geraint Emrys said farm inspections began in April to deliver information about safe quad bike use and provide farmers with copies of the department's new safety guidelines. Despite one in three farms around the country needing improvements on their quad bike safety, he said the department was pleased with findings.
"Where notices or warnings were issued many farmers improved their practices within days of an inspector visiting - this is impressive and it's been pleasing to see farmers taking ownership of their responsibilities.
"Farms are workplaces and farmers have a responsibility to ensure the health and safety of their staff.
"The department will consider prosecution where a worker has been seriously ill or killed at work because key safety steps have not been taken."
The department's statistics showed 850 New Zealanders were injured each year while riding quad bikes, and five people died as a result of those injuries.
So far this year in Hawke's Bay there have been four serious accidents, and the death of Wairoa farmer Keven Knauf after his quad bike rolled down a 40m bank.