HYC Wheat Germplasm x Environment x Management GEM – May sown

• Grain yields in this season’s GEM May sown trial were inferior to the results collected from the earlier time of sowing with Scepter and Rockstar yielding an average of 4 t/ha or less.
• RGT Accroc (mean 5.44 t/ha) was higher yielding than both Rockstar (3.66 t/ha) and Scepter (4.07 t/ha).
• The most significant management effects were again those observed due to fungicide management with the three cultivars giving an average increase of 0.64 t/ha to three units of fungicide compared to one flag leaf spray.
• All varieties were, despite fungicide application, affected by the new strain of stripe rust (pathotype 239).
• Milling wheat quality (protein, test weight and screenings) was not achieved with any management approaches due to poor test weight.
• The higher yielding feed wheat RGT Accroc was subject to higher than normal disease pressure, however even with three units of fungicide it was the more profitable to grow, as milling wheats never reached the quality criteria to secure a premium and were 1.5-2.0 t/ha t/ha lower yielding.
• There were no significant differences in yield and protein levels when comparing 150 and 225kg N/ha applied.
• The only quality criteria affected by management was fungicide input which affected screening % and overall N level which increased grain protein when applied N input was increased from 150 – 225kg N/ha.
• The most profitable management approach with all three varieties was result of 150kg N/ha and three fungicide applications.

Trial design: Factorial (Variety x Management)

Rotation position: 2021 Faba Beans
Soil type: Grey clay loam
Colwell P (ppm) 0-10cm: 110.0
pH (CaCl2) 0-10cm: 5.0
Organic Carbon (%) 0-10cm: 2.4