Thursday, 19 August 2021 06:55

National project offers hope in war against weeds

Written by  Staff Reporters
Phil McKenzie at McKenzie covenant Mt Hamilton. Photo credit: Guy Salmon Phil McKenzie at McKenzie covenant Mt Hamilton. Photo credit: Guy Salmon

A coordinated national research project has been launched to combat six of New Zealand’s most invasive weeds through biocontrol.

The three-year, $3.2 million project is backed by the Ministry for Primary Industries Sustainable Food and Fibre Futures fund, Landcare Research, and the National Biocontrol Collective (the Collective) – a consortium of regional councils, unitary authorities and the Department of Conservation.

“There’s no doubt about it – weeds are a constant source of stress for landowners,” says Phil McKenzie, chairman of the project’s governance group.

“Biocontrol has the potential to provide a longer-term solution at a time when more registered herbicides are being restricted by our export trading countries, weeds are becoming resistant to herbicides, and New Zealand society is demanding more environmentally friendly farming practices.”

The project has three workstreams. These are to:

  • advance biocontrol programmes for several high-priority weeds
  • monitor weed reduction in matured biocontrol programmes on productive land
  • develop a partnership for sustaining investment in weed biocontrol.

The project will focus on Sydney golden wattle (Acacia longifolia), Chilean needle grass (Nassella neesiana), old man’s beard (Clematis vitalba), woolly nightshade (Solanum mauritianum), Chilean flame creeper (Tropaeolum speciosum), and yellow flag iris (Iris pseudacorus).

By completion, the project aims to secure Environmental Protection Authority approval for the release of new biocontrol agents for at least three of these six weed species.

“Weeds are a major threat to New Zealand’s natural and productive ecosystems, and they’re costly to control,” says McKenzie.

“Through this project we aim to safeguard our environment and save landowners and councils money by finding smarter ways to reduce herbicides and the labour needed for weed control.

“Although biocontrol is expensive upfront to develop, collaborative cost-sharing models will make the development stage affordable – and the long-term benefits make it well worthwhile.

“We’ve got 15 regional councils co-investing in the project too, which enables regional priorities to be accounted for in selecting weeds to work on.”

“Biocontrol can be a long-term, cost-effective and sustainable weed management solution,” says Steve Penno, MPI’s Director Investment Programmes.

“By pooling our research efforts across multiple development streams, including adopting what’s worked in previous biocontrol programmes, we’ll be able to accelerate progress considerably.

“Farmers need more effective tools to manage these invasive weeds. To be able to eradicate or at least substantially reduce some of our most persistent weeds would be a huge win.”

More like this

Overseer - ditch it or fix it

Debate on the value of Overseer, the software tool designed to measure and regulate nutrient loss from farms, continues to rage.

MPI moves quickly on Covid

The productive and primary sector appears to be well placed to deal with the Alert Level Four settings according to the Director General of MPI, Ray Smith.

Feed support available

Flood-affected farmers in the South Island are being encouraged to make use of livestock feed support services funded by the Ministry for Primary Industries (MPI).


Machinery & Products

Effluent injection goes XL

Dutch effluent specialist Vredo is testing 15 and 18-metre wide slurry injection rigs for the upcoming 2022 spreading season.

Choosing the right pump

Choosing the right pump for an effluent system is the key to ensuring a system works well and gives many…

Spreading muck with ease

Palmerston North headquartered Strautmann Hopkins Ltd imports the extensive range of Strautmann Muck Spreaders for farmers and contractors, built by…

» The RNG Weather Report

» Latest Print Issues Online

Milking It

Liquid or powder?

Fonterra, the biggest exporter of milk powder to Sri Lanka, may have a new battle on its hands.

Failed legal action

UK vegan and animal rights groups have failed in a bid to ban an advertising campaign promoting meat and dairy…

» Connect with Dairy News

» eNewsletter

Subscribe to our weekly newsletter