Risks and RATs: Assessing glyphosate resistance risk in paddocks in north-eastern Australia

Thornby, David, Werth, Jeff, Curr, Matt and Walker, Steve (2010). Risks and RATs: Assessing glyphosate resistance risk in paddocks in north-eastern Australia. In: S. M. Zydenbos, Proceedings of the Seventeenth Australasian Weed Conference (2010) - New frontiers in New Zealand: Together we can beat the weeds. 17th Australasian Weeds Conference (2010), Christchurch, New Zealand, (246-249). 26-30 September 2010.

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Author Thornby, David
Werth, Jeff
Curr, Matt
Walker, Steve
Title of paper Risks and RATs: Assessing glyphosate resistance risk in paddocks in north-eastern Australia
Conference name 17th Australasian Weeds Conference (2010)
Conference location Christchurch, New Zealand
Conference dates 26-30 September 2010
Proceedings title Proceedings of the Seventeenth Australasian Weed Conference (2010) - New frontiers in New Zealand: Together we can beat the weeds
Place of Publication Christchurch, New Zealand
Publisher New Zealand Plant Protection Society
Publication Year 2010
Sub-type Fully published paper
Editor S. M. Zydenbos
Start page 246
End page 249
Total pages 4
Language eng
Formatted Abstract/Summary
Glyphosate resistance has for a number of
years been recognised as threatening the profitability
of conservation farming practices in north-eastern
Australia. Risk assessment and preventative management
are a key part of the industry’s response to the
problem. We developed a risk assessment tool (RAT)
to assess glyphosate resistance risk in cotton and grains
systems in this region. This tool allows us to determine
a risk score for weeds in varying crop rotations
and herbicide use patterns. Through a fax survey, we
estimated resistance risk levels for 21 cotton growers
in north-eastern Australia. Several key weeds were
identified as being particularly at risk, although the
majority of weed species scored relatively low. A
wide range of management risk levels was observed,
but in general non-irrigated cotton crops and fallows
were found to have the highest estimated resistance
risk. Glyphosate-tolerant cotton crops scored higher
for risk than conventional cotton crops. Fleabane,
sowthistle and several summer grasses were estimated
to be particularly at risk of resistance in non-irrigated
glyphosate tolerant cotton crops, and winter and/or
summer fallows. Online delivery of the RAT provides
growers and researchers with several key features. Users
can assess their current risk levels within minutes,
and can also test likely risk for potential rotations and
alternative herbicide usage patterns. Responses from
the RAT are compiled to track changing risk levels
through time and between regions. Inferences about
the rate of uptake of herbicide use recommendations
can therefore be made.
Keyword Herbicide resistance
Risk assessment
Weeds management
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Conference Paper
Collection: School of Agriculture and Food Sciences
 
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Created: Mon, 21 Mar 2011, 08:47:27 EST by Samantha Richards on behalf of Qld Alliance for Agriculture and Food Innovation