To study timing of post-flowering applications of desiccants on
1. sterilisation of developing ryegrass seeds and
2. seed-filling, development and yield of range of field pea varieties.
The objective is to time a single “crop-topping” spray to kill all developing ryegrass seeds and at the same time desiccate the field pea crop with minimal or no loss of yield or seed size.
Early and on time desiccation resulted in large yield losses.
Early and on time desiccation resulted in large reductions in seed size, but not to the same
degree as yield.
What were the reasons (other than reduced seed size) that contributed to these yield
losses? Was ‘pinched’ seed lost through the header at harvest?
Yield losses were bigger in the later flowering variety Kaspa.
Need to more closely fine-tune growth stages with physiological maturity to pick the “on
time” desiccation spray.
Oura and Pearl were early and the pick of varieties suited to crop-topping & desiccation.
Lead research organisation
Department of Primary Industries VIC
Host research organisation
Trial funding source
Trial funding source
Trial funding source
Trial funding source
Southern Pulse Agronomy
Research staff: Jason Brand, Luke Gaynor, Mick Lines, Larn McMurray, Eric Armstrong, Jenny Davidson, Andrew Ware, Trent Potter, Jason Ellifson, Jennifer Briggs, Keisha Savage, Russel Argall, Ashley Purdue, Gerard O’Connor, Stuart Sherriff, Peter Maynard, John Nairn, Leigh Davis.
Industry Collaborators: Michael Materne and Tony Leonforte, Pulse Breeding Australia, DPI – Horsham Victoria; Kristy Hobson, Pulse Breeding Australia, DPI – Tamworth NSW; Jeff Paull, Pulse Breeding Australia, University of Adelaide South Australia; Wayne Hawthorne and Trevor Bray, Pulse Australia.
We are grateful for the support we receive from the numerous commercial agronomists and seed commercialising companies.
Other trial partners
Pulse Breeding Australia, The University of Adelaide, Pulse Australia
Trial source data and summary not available Check the trial report PDF for trial results.
Derived climate information
No observed climate data available for this trial. Derived climate data is determined from trial site location and national weather sources.
Wagga Wagga NSW
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
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