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Assessing weeds at risk of evolving glyphosate resistance in Australian sub-tropical glyphosate-resistant cotton systems

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Werth, J., Thornby, D. and Walker, S. (2011) Assessing weeds at risk of evolving glyphosate resistance in Australian sub-tropical glyphosate-resistant cotton systems. Crop and Pasture Science, 62 (11). pp. 1002-1009. ISSN 18360947 (ISSN)


Article Link: http://doi.org/10.1071/CP11201


Glyphosate resistance will have a major impact on current cropping practices in glyphosate-resistant cotton systems. A framework for a risk assessment for weed species and management practices used in cropping systems with glyphosate-resistant cotton will aid decision making for resistance management. We developed this framework and then assessed the biological characteristics of 65 species and management practices from 50 cotton growers. This enabled us to predict the species most likely to evolve resistance, and the situations in which resistance is most likely to occur. Species with the highest resistance risk were Brachiaria eruciformis, Conyza bonariensis, Urochloa panicoides, Chloris virgata, Sonchus oleraceus and Echinochloa colona. The summer fallow and non-irrigated glyphosate-resistant cotton were the highest risk phases in the cropping system. When weed species and management practices were combined, C. bonariensis in summer fallow and other winter crops were at very high risk. S. oleraceus had very high risk in summer and winter fallow, as did C. virgata and E. colona in summer fallow. This study enables growers to identify potential resistance risks in the species present and management practices used on their farm, which will to facilitate a more targeted weed management approach to prevent development of glyphosate resistance. © CSIRO 2011.

Item Type:Article
Business groups:Crop and Food Science
Keywords:glyphosate resistance glyphosate-resistant cotton risk assessment. cohort analysis cotton decision making facilitation fallow glyphosate management practice pesticide application pesticide resistance risk assessment subtropical region Australia Brachiaria Brachiaria eruciformis Chloris virgata Conyza Conyza bonariensis Echinochloa Echinochloa colona Gossypium hirsutum Sonchus Sonchus oleraceus Urochloa panicoides
Subjects:Plant culture > Field crops > Textile and fibre plants
Plant culture > Field crops > Other economic plants
Plant pests and diseases > Weeds, parasitic plants etc
Live Archive:04 Apr 2019 04:06
Last Modified:03 Sep 2021 16:45

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