Key Points
- The maximum yield responses at this site to fungicide in spring sown Optic was 78% (3t/ha increase) irrigated and 60% (1.9t/ha increase) dryland.
- Yield increases gave margins over chemical costs ranges of $187 to $616/ha on irrigated and $148 to $299/ha on dryland.
- The use of strobilurins in an irrigated situation gave the greatest yield benefits over that on dryland.
- Proline gave better disease control, grain yield and MOCC than Opus on its own.
- The difference between Proline and Opus was not apparent when these products were partnered with Acanto and Twist.
- The addition of Protek improved disease control and slightly improved grain yield and MOCC when applied with a triazole.