Since the introduction of Flexi-N, ‘leaf scorch’ has slowly become an accepted part of the liquids phenomen with full crop recovery and no yield loss. In recent years however with the advent of new Ag Chemicals, the question has been asked if the same crop recovery principles still apply.
Recent scorch trials conducted at York and Lake Grace have shown higher levels of damage under NDVI assessment and leaf test compared to the control treatment but in all cases recovered well to achieve higher yields at harvest.
Unfortunately the planned Bunjil site was removed from the project due to the poor season.. We are hoping to redo this trial in the North to assess the impact on crops of some commonly used Ag Chemicals mixed with Flexi-N.
See below for final yield results, note that each treatment was replicated three times for scientific analysis.

1: York Site
Trial A: Z32 application
Kalyx recorded the highest percentage of leaf damage on Treatments 4, 6, 8 & 9, measured at 7DAT.
Crop had 2-3 nodes when sprayed.
• 0.3 - 0.5 t/ha response to 100 L/ha Flexi-N
• No ill effects on yield from applying Precept, Velocity or Esteron LV with Flexi-N
• Higher yield with Streamers (did not find this Lake Grace)
Trial B: Z37 application
Kalyx recorded the highest percentage of leaf damage on Treatment 15, with up to 85% scorch evident on some leaves, measured at 10DAT.
• 0.5 t/ha response to 100 L/ha Flexi-N without Prosaro
• 0.3 t/ha response to Prosaro
• Small but not significant response to Flexi-N where Prosaro was applied
• 0.5 t/ha reduction in yield from High scorch Brew applied with Flexi-N (scorch impact)
• 0.8 t/ha reduction in yield from Prosaro + Supercharge + CuSO4 applied with Flexi-N (scorch impact)• Flat fan nozzles achieved a +0.3 t/ha better result than streamers
2. Lake Grace site
Trial A: Z30 application
Kalyx recorded the highest percentage of leaf damage on Treatments 4, 6, 8 & 9, measured at 8DAT.
• No evidence of scorch reducing yield (Trt 9 caused severe scorch)
• No significant difference between flat fans and streamers
Trial B: Z37 application
Kalyx recorded the highest percentage of leaf damage on Treatment 15 with up to 80% scorch evident on some leaves, measured at 9DAT.
• 0.3 t/ha response to Prosaro
• Inconclusive effects from severe scorch Trts 15 (cf 14) & 16 (cf 12)
• No significant difference between flat fans and streamers
• Esteron LV: 1.5L/ha with 50L/ha water
• Precept: 2L/ha with 50L/ha water
• High scorch brew: 0.3% of 20L with Flexi-N
Trial B rates:
• Prosaro: 1L/ha with 50L/ha water
• SuperCharge: 1% of 20L with Flexi-N
• CuSO4: 4kg with 20L Flexi-N
• High scorch brew: 0.3% of 20L with Flexi-N
Overall, yield results from the project did not present any findings that were unexpected and should provide users with the confidence to apply treatments concurrently without needing that extra pass. General scorch precautions still apply including temperature, wind, Delta-t and plant stage.