Weeds present in rice crops of southern New South Wales

John Broster, Allison Chambers

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


Weed control in the rice industry has been dependent on veryfew herbicides. Significant levels of resistance have been reported to one of the major herbicides (bensulfuron or Londax®). Random surveys were undertaken in both 2016 and 2017 in which the densitiesof the weed species wereestimated. Additionally, screenings from rice samples analysed by the AGSQuality Appraisals Centre at Leeton were obtained. These screenings werefurther sorted to determine the quantityand species of weed seeds in the delivery samples.From the AGSQuality Appraisals Centre samples it was estimated that 150 billion barnyard grass seeds were delivered to silos during the 2017 harvest. This shows that while populations may not be resistant there are surviving plants setting seeds and those seeds not delivered to silos are replenishing the seed bank. In subsequent seasons the plants germinating from this seed bank are placing selection pressure for resistance development on the herbicides used for their control.
Original languageEnglish
Title of host publicationProceedings of the 19th Australian Agronomy Conference
PublisherAustralian Society of Agronomy
Number of pages4
Publication statusPublished - 2019
Event19th Australian Agronomy Conference 2019 - Wagga Wagga Civic Theatre, Wagga Wagga, Australia
Duration: 25 Aug 201929 Aug 2019
https://web.archive.org/web/20190122040437/http://agronomyconference.com/ (Conference website)
https://web.archive.org/web/20190625230032/http://www.agronomyconference.com/program (Conference program)


Conference19th Australian Agronomy Conference 2019
Abbreviated titleCells to Satellites
CityWagga Wagga
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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