Herbicide resistance testing of Lolium rigidum by commercial institutions

Peter Boutsalis, John Broster

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

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    Abstract

    Summary: Herbicide resistance in broad-acre cereal farming is a major issue confronting farmers today. The most significant weed species that has developed resistance is annual ryegrass (Lolium rigidum Gaudin). Knowledge of the herbicide resistance status of a paddock allows for strategic farm planning and correct herbicide choice. As resistance increases, more farmers are electing to have their paddocks tested for herbicide resistance using herbicide resistance testing facilities. The findings from the testing facilities have shown high levels of resistance to aryloxyphenoxypropionate (FOP) and sulfonylurea (SU) herbicides. There is increasing resistance to the cyclohexanedione (DIM) herbicides and trifluralin, which have been used to combat FOP and SU herbicide resistant ryegrass. This is a concern for many farmers as their herbicide options are greatly reduced. The objective of this paper is to summarise the findings of annual ryegrass resistance testing that has been conducted by Charles Sturt University and Plant Science Consulting in the last two seasons.
    Original languageEnglish
    Title of host publication15th conference proceedings
    Subtitle of host publicationManaging Weeds in a Changing Climate
    EditorsJ H Watts C Preston, N D Crossman N D D Crossman
    Place of PublicationAdelaide, Australia
    PublisherWeed Management Society of South Australia
    Pages488-490
    Number of pages3
    ISBN (Electronic)0646463446
    Publication statusPublished - 2006
    EventAustralasian Weeds Conference (AWC) - Adelaide, Australia, Australia
    Duration: 24 Sept 200628 Sept 2006

    Conference

    ConferenceAustralasian Weeds Conference (AWC)
    Country/TerritoryAustralia
    Period24/09/0628/09/06

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