University Of Tasmania

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Plant growth regulators in broad acre crops

conference contribution
posted on 2023-05-23, 18:42 authored by Tina AcunaTina Acuna, Merry, AM, Geoffrey DeanGeoffrey Dean, Anna CarewAnna Carew, Peat Leith, Nelson, R

Take home messages:

• PGRs are generally accepted to reduce plant height in grain cereals when applied at the appropriate stage of development; improvement in grain yield tends to be inconsistent

• A survey of 142 Australian agronomists found that only 20% recommend the use of PGRs in crop management of wheat, mainly due to improved lodging resistance followed by height reduction and improved yield

• Reasons why agronomists don’t recommend PGR use in the crops they manage were because they were ‘not needed’ or unsuited to their region

• Application of PGR with no change in yield from e.g. a 2.38 Mha area (representing 70% of the HRZ) would lead to a cost of around $70M. In contrast, there would be a net benefit of around $35M and $138M for a 5 and 10% change in grain yield in the HRZ.


Grains Research & Development Corporation


Publication title

GRDC Grains Research Update for Advisers




School of Architecture and Design

Event title

GRDC Grains Research Update for Advisers

Event Venue

Adelaide SA

Date of Event (Start Date)


Date of Event (End Date)


Repository Status

  • Restricted

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