Hyper Yielding Crop Wheat Disease Management cv Big Red- NSW

• Grain yield varied by less than 0.2t/ha, with the untreated crop of Red Big yielding 7.73t/ha, and the highest yield being 7.74t/ha recorded in the two-spray approach at GS31 and GS39.
• Despite very small improvements in Septoria tritici blotch (STB) control associated with the application of a GS31 (1st node) fungicide, the untreated crop was the most profitable.
• The four-unit strategy was the least cost effective, losing approximately $110/ha because of expenditure that was not warranted.
• Other fungicide programs lost similar amounts of money as the four-unit strategy relative to the untreated as a result of lower expenditure but slightly lower yields (0.05 – 0.18t/ha).

Rotation position: 2022 Canola, 2021 Wheat, 2020 Canola, 2019 Legume Pasture
Soil type: Red clay loam
Nitrogen 0-60cm: 226kg N/ha
Colwell P (ppm) 0-10cm: 32mg/kg
pH (CaCl2) 0-10cm: 5.0
Organic Carbon (%) 0-10cm: 2.6%