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RESEARCH ARTICLE
Contents Vol 44(12)

The economic value of haying and green manuring in the integrated management of annual ryegrass and wild radish in a Western Australian farming system

M. Monjardino A B , D. J. Pannell B and S. B. Powles A
+ Author Affiliations
- Author Affiliations

A Western Australian Herbicide Resistance Initiative, Faculty of Natural and Agricultural Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.

B School of Agricultural and Resource Economics, University of Western Australia, c/- WA Department of Agriculture, 444 Albany Highway, Albany, WA 6330, Australia.

Australian Journal of Experimental Agriculture 44(12) 1195-1203 https://doi.org/10.1071/EA03144
Submitted: 15 July 2003  Accepted: 5 March 2004   Published: 24 January 2005

Abstract

Most cropping farms in Western Australia must deal with the management of herbicide-resistant populations of weeds such as annual ryegrass (Lolium rigidum) and wild radish (Raphanus raphanistrum). Farmers are approaching the problem of herbicide resistance by adopting integrated weed management systems, which allow weed control with a range of different techniques. These systems include non-herbicide methods ranging from delayed seeding and high crop seeding rates to the use of non-cropping phases in the rotation. In this paper, the Multi-species RIM (resistance and integrated management) model was used to investigate the value of including non-cropping phases in the crop rotation. Non-crop options investigated here were haying and green manuring. Despite them providing excellent weed control, it was found that inclusion of these non-cropping phases did not increase returns, except in cases of extreme weed numbers and high levels of herbicide resistance.


Acknowledgments

The authors acknowledge the contribution of A. Draper, R. Llewellyn and M. Walsh in reviewing this paper. The Grains Research and Development Corporation and the Cooperative Research Center for Weed Management Systems provided financial support for this research.


References


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Appendix 1.  Herbicides included in the Multi-species RIM model for each weed species
The letters under each weed indicate the enterprises to which the herbicide is applicable (a dash indicates that the herbicide is not an option for this weed)
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