News Video | Policy | GPs | Hospitals | Medical | Mental Health | Welfare | Search

 

Pesticide-free hops deal ‘the first of many’

A contract with a major international brewery for pesticide-free hops could be the first of many as growers cash in on New Zealand’s unique conditions and the results of more than 10 years of scientific research.

The hops were grown using predator insects instead of chemical sprays to control the only real pest of hops in NZ – the two-spotted mite.

The predator monitoring programme has been more than 10 years in research and development and was used for the first time last year to produce a commercial consignment of hops designed for export. Developed by the Hop Research Group at HortResearch’s Nelson Research Centre, the programme opens up huge possibilities for NZ-grown crops as demand for pesticide-free and organic crops increases.

Scientist Ron Beatson, who has developed the programme with technician Trish Virgin, said that hop growers in Europe and the United States have no choice but to spray –usually between 10 to 20 times a season. They face fungal diseases and a hop aphid that will devastate the crop if let untreated.

“We’re lucky here that the two-spotted mite is the only real pest,” he said. “Last year about eight growers tried using the predator mite monitoring programme and this year it is being used on a wider basis across the growing industry.

“Costs are similar and growers are finding that the extra work involved in introducing the mites to the hop garden and monitoring them is well worth the effort as overseas buyers will pay a premium for spray-free hops.”

Growers buy boxes containing 1000 predators on bean leaves. The leaves are attached to hop plants in the field and the predators then build up and eat the two spotted mites.

Growers send leaves to HortResearch throughout the season so that researchers can check that the correct ratio between mites and predators is maintained.

The next step in the programme is an attempt to gain Agmardt funding so the scheme can be better co-ordinated, with training days for growers so that they learn to identify the mites and can carry out their own monitoring.


ENDS

© Scoop Media

 
 
 
Culture Headlines | Health Headlines | Education Headlines

 

Renée, Wystan Curnow, Michael Harlow:: PM's Awards For Literary Achievement

Feminist and working-class stories, poetry as song, and a deeper understanding of New Zealand art – these are just some of the frontiers explored by this year’s winners of the Prime Minister’s Awards for Literary Achievement. More>>

ALSO:

It's A Coo: Kererū Crowned Bird Of The Year For 2018

With a whoosh-whoosh, the kererū has swooped to glory for the first time, in Forest & Bird’s annual Bird of the Year competition. More>>

ALSO:

Mustelids: Zealandia Traps Weasel Intruder

Zealandia has successfully trapped a weasel discovered within the protected wildlife sanctuary... The female weasel was found in a DOC200 trap by a Zealandia Ranger, at the southern end of the sanctuary where the animal was first detected. More>>

Howard Davis Review: Stray Echoes Leave No Trace

Writer and director Dustin Feneley's feature debut is a beautifully lyrical and cinematic tone poem that brings an unflinching eye to loneliness and isolation. More>>

 
 
 
 
 

LATEST HEADLINES

  • CULTURE
  • HEALTH
  • EDUCATION
 
 
  • Wellington
  • Christchurch
  • Auckland