Creating value through unique plant opportunities.

AR37 endophyte research - project comes to a close
Monday, February 01, 2010

Errol Thom,
Senior Scientist, DairyNZ

Overall conclusions

  1. AR37 ryegrass was clearly more persistent than either AR1 or Standard (HE) ryegrass. This supports findings from previous work.
  2. The greater persistency translated into a reduced need for renovation of AR37 pastures after the 2008 drought, but in the three years before that time there was no difference in total pasture yield.
  3. There was no sign of ryegrass staggers or any other animal health issues in cows grazing AR1 or AR37 pastures – even at times when cows grazing HE were affected by ryegrass staggers.
  4. With ryegrass/white clover pastures, there was a trend for slightly lower milksolids (MS) production over summer from cows grazing AR37 or HE compared with AR1. With pure ryegrass pastures there were no significant differences in MS production. These results suggest that the higher clover content of the AR1 mixed pasture was a contributing factor to the observed MS production differences.
  5. Where pasture persistence is the top priority then AR37 will clearly deliver benefits. Where persistence of AR1 ryegrasses is not a problem, continuing to sow AR1 is advised.


Products & services
Collaborative research and project
management of plant technologies.
Development and licensing of plant varieties, grass endophytes and plant genes.
Protection of intellectual property through patents, trade marks and plant variety rights.
Production and sale of high quality early generation seedstock.
  More information »
Key successes


A natural fungus (endophyte) that lives in grass and produces chemicals that make birds feel sick when ingested, but does not harm them. This endophytic grass also reduces... Read more »

View all key successes »

Latest news

Winner of the NZ Hi-Tech Awards 2012

At the 2012 New Zealand Hi-Tech Awards gala dinner held in Auckland on Friday 11th May, Grasslanz Technology Limited was presented with the HSBC Most Innovative Product from an Emerging Market Award for Agritech... Read more »

View all news articles »