In a difficult growing season beset with torrential rain, low temperatures and barely a sight of the sun, 45 growers up and down the country valiantly carried out 58 split field trials at the T2 (flag leaf) spray timing to compare 1.0 L/ha Aviator235Xpro (prothioconazole + bixafen) with their best farm standard. This ranged from more traditional high dose epoxiconazole + pyraclostrobin (1/4 of trials), to new SDHIs such as Seguris (epoxiconazole + isopyrazam) (1/4 of trials) and Adexar (epoxiconazole + fluxapyroxad) (50% of trials). 1/4 of the Adexar and Seguris treatments were topped up with extra epoxiconazole.
Growers final yields were adjusted to 15% moisture.
Participants also supplied us with relevant farm input data, allowing us to analyse a multitude of variables which included:
But no significant trends relating to the above factors were identified, with Aviator235Xpro delivering benefits over competitors in the majority of situations.
All grower trials carried a significant level of Septoria, with around a 1/4 having rusts, 10% with mildew and less than 5% with eyespot.
1. Aviator235Xpro 1.0 L/ha vs azole + strob at T2 = 0.6t/ha yield advantage to Aviator235Xpro
These results compared favourably to our larger, 2012 mainly independent trials dataset of 37 replicated trials, giving an advantage to Aviator235Xpro of 0.8t/ha over an azole + strob T2, worth around £150/ha in extra profit (wheat at £190/t).
2. Aviator235Xpro 1.0 L/ha vs Seguris (0.8 - 1.25 L/ha) = 0.4t/ha yield advantage to Aviator235Xpro
Again, these results are identical to our larger independent and BCS datasets of 21 replicated trials, showing 0.4t/ha yield advantage to 1.0 L/ha Aviator235Xpro vs. 0.8 L/ha Seguris, worth an extra £76/ha extra profit.
3. Aviator253Xpro 1.0 L/ha vs Adexar (1.0 - 2.0 L/ha) = broadly similar performance, at a lower price/ha for Aviator235Xpro.
Once more the results were in line with our broader, largely independent, 2012 datasets which show that the approximate technical equivalence to 1.0 L/ha Aviator235Xpro is 1.25 L/ha Adexar. In 11 trials in 2012, 1.0 L/ha Aviator235Xpro even outperformed 1.5 L/ha Adexar by 0.1t/ha.
4. Aviator235Xpro vs all T2 farm standards in 2012
64% of farmers taking part in this year’s trials enjoyed a positive response, averaging an extra 0.5t/ha, from Aviator235Xpro vs. their farm standard of choice. 17% had a neutral response and only 19% got better results from their chosen standard.
Adexar is a trademark of BASF and contains epoxiconazole + fluxapyroxad
Seguris is a trademark of Syngenta and contains epoxiconazole + isopyrazam