Evolved resistance to glyphosate in junglerice (Echinochloa colona) from the tropical Ord River region in Australia.

Gaines T. A.; Cripps A.; Powles S. B.

首页> 外文期刊>Weed technology: A journal of the Weed Science Society of America >Evolved resistance to glyphosate in junglerice (Echinochloa colona) from the tropical Ord River region in Australia.

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Evolved resistance to glyphosate in junglerice (Echinochloa colona) from the tropical Ord River region in Australia.

机译：Evolved resistance to glyphosate in junglerice (Echinochloa colona) from the tropical Ord River region in Australia.

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The objective of this study was to determine whether a junglerice population from the tropical Ord River region of northwest Australia was glyphosate resistant, and whether alternative herbicides labeled for junglerice control were still effective. Seed samples collected from the field site were initially screened with glyphosate in the glasshouse, and surviving individuals were self-pollinated for subsequent glyphosate dose-response studies. Glyphosate resistance was confirmed, as the suspected resistant population was found to be 8.6-fold more resistant to glyphosate than a susceptible population based on survival (LD50 of 3.72 kg ha-1), and 5.6-fold more resistant based on biomass reduction (GR50 of 1.16 kg ha-1). The glyphosate-resistant population was susceptible to label-recommended doses of all other herbicides assessed, including three acetyl-CoA carboxylase (ACC) - inhibiting herbicides (fluazifop-P, haloxyfop, and sethoxydim), two acetolactate synthase (ALS) - inhibiting herbicides (imazamox and sulfometuron), paraquat, and glufosinate. Glyphosate resistance has previously evolved in numerous species found in glyphosate-resistant cropping systems, no-till chemical fallow, fence line, and perennial crop situations. Here we report the evolution of glyphosate resistance in a cropping system that included annual tillage. The evolution of glyphosate resistance in junglerice from a tropical cropping system further demonstrates the need for improved glyphosate stewardship practices globally.CAS Registry Numbers 79241-46-6 83066-88-0 51276-47-2 53369-07-6 77182-82-2 38641-94-0 1071-83-6 70393-85-0 69806-34-4 69806-40-2 87237-48-7 114311-32-9 2074-50-2 4685-14-7 1910-42-5 9023-93-2 22059-21-8 74051-80-2 74222-97-2 74223-56-6

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《Weed technology: A journal of the Weed Science Society of America》 |2012年第3期|480-484|共5页
作者
Gaines T. A.; Cripps A.; Powles S. B.;
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作者单位

Postdoctoral Research Associate and Winthrop Professor, Australian Herbicide Resistance Initiative, School of Plant Biology, Institute of Agriculture, M086, University of Western Australia, Crawley, WA 6009, Australia;

Agronomist, Ord River District Co-operative Ltd., P.O. Box 2120, Kununurra, WA 6743, Australia;

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中图分类植物保护;
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Evolution; glyphosate resistance; herbicide resistance;

Evolved resistance to glyphosate in junglerice (Echinochloa colona) from the tropical Ord River region in Australia.

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