By Kelly Angel (BCG) and Rob Launder (Agritech Rural)
- In 2014 – a dry season with limited growth and yield at the trial site
– Plant Growth Regulators (PGRs) were not economically viable or
- PGR use in a tough season may pose more risk than benefit to
cereal crops; their use should be gauged on seasonal outlooks.
- In 2014, reduction in plant height was greatest with a PGR applied
either as a single late, or a split application, not an early application.
- The combination of a fungicide such as Amistar Xtra with a PGR
such as Moddus Evo, appears to increase the effect of the PGR on
The aim of the investigation was determine whether Moddus Evo, applied with and without fungicide at different timings, influenced the level of lodging and head loss in Scope CL barley, and to compare its performance against other PGRs when applied at GS31. The influence on stubble and crop residue was also examined as part of this trial.
The seasonal conditions experienced at the Horsham site in 2014 were very different from those of 2013. After a reasonable start, with good crop emergence and early growth, rainfall was limited and patchy and did not create the high growth situations within which the performance of PGRs and fungicides can be rigorously tested.
The NDVI assessment conducted at GS31, prior to the first treatment application, showed no difference between treatments, indicating even emergence and good early growth in all plots.
Despite the different rates and timings of Amistar Xtra and Moddus Evo, there was no significant difference in yield between any of the treatments in 2014, a result different from the 2013 findings.