The system included a mobile app for field workers to record information in real time.
Wilding trees were affecting more than 2million ha of land, and spreading at an estimated rate of 5% a year, he said.
A national programme to remove self-sown trees, spread from introduced wilding species, is in its second year.
Conservation Minister Maggie Barry said five new areas covering 371,000ha had been added to the programme for 2017-18, including the Lammermoor Range in Central Otago.
That was in addition to the more than 1million ha on which control efforts were carried out in 2016-17, Ms Barry said.
The Government is spending about $6million on the programme in 2017-18, along with nearly $2million in funding from other parties. It has allocated $16million for the programme's first four years.
The other new areas are Mid Dome, in Northern Southland, Ohau and two areas near Tekapo, in Canterbury.