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Type: Journal article
Title: Weed management practices in glyphosate-tolerant and conventional cotton fields in Australia
Author: Werth, J.
Preston, C.
Roberts, G.
Taylor, I.
Citation: Australian Journal of Experimental Agriculture, 2006; 46(9):1177-1183
Publisher: C S I R O Publishing
Issue Date: 2006
ISSN: 0816-1089
Abstract: Forty growers in 4 major cotton-growing regions in Australia were surveyed in 2003 to investigate how the adoption of glyphosate-tolerant cotton (Roundup Ready) had influenced herbicide use, weed management techniques, and whether changes to the weed spectrum could be identified. The 10 most common weeds reported on cotton fields were the same in glyphosate-tolerant and conventional fields in this survey. Herbicide use patterns were altered by the adoption of glyphosate-tolerant cotton with up to 6 times more glyphosate usage, but 21% fewer growers applying pre-emergence herbicides in glyphosate-tolerant fields. Other weed control practices such as the use of post-emergence herbicides, inter-row cultivation and hand hoeing were only reduced marginally. However, growers indicated that management practices are likely to change over time, especially with the introduction of enhanced glyphosate tolerance technology (Roundup Ready Flex), and anticipate a 32% decrease in the number of growers using alternative weed management practices. To date, management practices other than glyphosate use have not changed markedly in glyphosate-tolerant cotton indicating a conservative approach by growers adopting this technology and reflecting the narrow window of herbicide application. The range of weed control options still being employed in glyphosate-tolerant cotton would not increase the risk of glyphosate resistance development.
Keywords: Integrated weed management; resistance; survey; Roundup Ready
RMID: 0020061094
DOI: 10.1071/EA05163
Appears in Collections:Agriculture, Food and Wine publications

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