Competitive wheats: Does more vigour early matter?

Cathrine H Ingvordsen, David J Smith, Tina Rathjen, Gurjet Gill, Leslie Weston, Washy Gapare, Greg J. Rebetzke

Research output: Book chapter/Published conference paperConference paperpeer-review

Abstract

Weeds are an ongoing challenge and herbicide-resistant weeds are on the rise. Incorporating weed-competitive varieties in the non-herbicide integrated weed management toolbox, make up a low cost and low risk approach to decrease the $4.3 billion weed costs Australian growers every year. We have assessed the competitive ability of a diverse set of 100 entries. The 100 entries vary from historic and modern wheat varieties to wheat lines developed to have wide leaves and greater biomass at stem elongation. Among the entries were also durum wheat, triticale and barley. The 100 entries were grown under field conditions in seven environments over three seasons with and without competition from oat or barley used as a weed-surrogate. Through in season measurements and separation of wheat grains and weed-surrogate grains after harvest we identified that wheats with wide leaves and greater biomass at early stem elongation only experienced yield decreases of 4-10% when grown in competition with weed-surrogate, whereas the best varieties decreased yield by 14% and worst decreased yield by 35%. Weed suppression was greatest in the high vigour lines.
Original languageEnglish
Title of host publicationProceedings of the 19th Australian Agronomy Conference
Subtitle of host publicationCells to satellites
PublisherAustralian Society for Agronomy
Pages1-4
Number of pages4
Publication statusPublished - 31 Mar 2019
Event19th Australian Agronomy Conference - Wagga Wagga Civic Theatre, Wagga Wagga, Australia
Duration: 25 Aug 201929 Aug 2019
http://agronomyconference.com/
https://www.agronomyaustralia.org/conference-proceedings (proceedings)
http://agronomyaustraliaproceedings.org/index.php
http://agronomyaustraliaproceedings.org/index.php/2019/41-front-pages/759-2019-index (proceedings)

Conference

Conference19th Australian Agronomy Conference
Abbreviated titleCells to Satellites
CountryAustralia
CityWagga Wagga
Period25/08/1929/08/19
OtherThe 19th Australian Agronomy Conference will be held in Wagga Wagga, NSW from
25 – 29 August 2019. In the heart of the Riverina, Wagga Wagga has a range of rural industries across the region. Wagga has everything to offer the agronomy conference being surrounded by a mixed farming zone with irrigation to the west and permanent pasture enterprises to the east.
The conference theme Cells to satellites highlights the integrative nature of agronomy. Each of us work across a range of disciplines to optimise crop or pasture production for productivity and profitability. We have an increasing number of tools available to increase the precision and accuracy of our work; whether it is at the “cellular” level where DNA is mapped and biochemistry is unravelled or using “satellites” for remote sensing or guidance. The opportunities for enhancing our agronomy research is boundless.
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