Agrichemical industry initiatives to combat development of herbicide resistance.
Currently 6 species of 4 weeds in Australia are resistant to herbicides. They are Hordeum glaucum, H. leporinum [Hordeum murinum, subsp. leporinum] Arctotheca calendula, Lolium rigidum, Avena fatua and A. sterilis. Resistance in L. rigidum is rapidly spreading and is a serious threat to viable winter cropping. Many, but not all, selections of L. rigidum exhibit cross and multiple resistances. A. fatua and A. sterilis resistance is likely to spread rapidly and become a serious problem if farmers don't quickly adopt measures to check its development. The Australian agricultural chemical industry has formed, under the auspices of the Agricultural and Veterinary Chemicals Association, a Herbicides Resistance Action Committee to assist farmers to combat the threat of resistance. The committee formulates and promotes the industry's strategies to minimise the risk and delay the development of resistance. The committee's current emphasis is focused on strategies to combat L. rigidum, A. fatua and A. sterilis.