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.
|Title of host publication||15th conference proceedings|
|Subtitle of host publication||Managing Weeds in a Changing Climate|
|Editors||J H Watts C Preston, N D Crossman N D D Crossman|
|Place of Publication||Adelaide, Australia|
|Publisher||Weed Management Society of South Australia|
|Number of pages||3|
|Publication status||Published - 2006|
|Event||Australasian Weeds Conference (AWC) - Adelaide, Australia, Australia|
Duration: 24 Sep 2006 → 28 Sep 2006
|Conference||Australasian Weeds Conference (AWC)|
|Period||24/09/06 → 28/09/06|
Boutsalis, P., & Broster, J. (2006). Herbicide resistance testing of Lolium rigidum by commercial institutions. In J. H. W. C. Preston, & N. D. C. N. D. D Crossman (Eds.), 15th conference proceedings: Managing Weeds in a Changing Climate (pp. 488-490). Weed Management Society of South Australia.