Key Points
- Four autumn wheat cultivars, Claire, Hussar, Regency and Torlesse were sown in Methven and Wakanui to assess their yield responses to basic fungicide treatments
- The Methven site was un-irrigated and only stripe rust appeared at this site, but with limited effect on grain yield. The Wakanui site had an early stripe rust infection, with speckled leaf blotch and a re-infection of stripe rust later
- Claire yields did not increase with fungicides at Methven and only increased at Wakanui when there was an early application of Amistar + Opus
- Regency yields only increased significantly at either site with some treatments, but this was not consistent
- Hussar yields increased at both sites with all treatments. The best responses were to fungicides applied at both GS31 and GS39
- Torlesse yields increased with most treatments at Methven and with all treatments at Wakanui; best yields at Wakanui followed two fungicide applications