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Chloroacetamide Resistance in Rigid Ryegrass (Lolium rigidum)

Published online by Cambridge University Press:  12 June 2017

Michael W. M. Burnet ,
Andrew R. Barr  and
Stephen B. Powles
Michael W. M. Burnet
Affiliation:
Dep. Crop Prot., Waite Agric. Res. Inst., P.M.B. 1, Glen Osmond 5064, South Australia and Oat Breeder (A.B.), South Australian Dep. Agric, Northfield Res. Laboratories, South Australia, 5085
Andrew R. Barr
Affiliation:
Dep. Crop Prot., Waite Agric. Res. Inst., P.M.B. 1, Glen Osmond 5064, South Australia and Oat Breeder (A.B.), South Australian Dep. Agric, Northfield Res. Laboratories, South Australia, 5085
Stephen B. Powles
Affiliation:
Dep. Crop Prot., Waite Agric. Res. Inst., P.M.B. 1, Glen Osmond 5064, South Australia and Oat Breeder (A.B.), South Australian Dep. Agric, Northfield Res. Laboratories, South Australia, 5085
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Abstract

Metolachlor has been evaluated both as a herbicide for use in cultivated oats (Avena sativa L.) and for its potential as an alternative herbicide for the control of herbicide-resistant rigid ryegrass. Eight herbicide-resistant and two susceptible biotypes of rigid ryegrass were tested for their susceptibility to metolachlor. Response to metolachlor was determined both in soil and an agar germination medium. The LD50 for metolachlor in agar for a susceptible biotype (VLR1) was 0.13 μM. Five biotypes, SLR5 (6.9 fold), SLR31 (5.2 fold), SLR10 (2.5 fold), NLR12 (2.1 fold) and VLR69 (1.9 fold), were cross-resistant to metolachlor when compared with VLR1. Relative response of the biotypes was similar in both soil and agar, validating the use of an agar germination test to determine the susceptibility of rigid ryegrass biotypes to metolachlor. Biotypes cross-resistant to metolachlor also were cross-resistant to alachlor (SLR5 6.7 fold, SLR31 5.9 fold, SLR10 2.4 fold, and VLR69 1.6 fold with the LD50 for VLR1 being 0.49 μM) and propachlor (SLR57.2 fold, SLR31 7.2 fold, SLR10 3.0 fold and VLR69 2.5 fold with the LD50 for VLR1 being 0.47 μM) indicating that cross-resistance extends to other members of the chloroacetamide group. Cross-resistance to chloroacetamides was observed in biotypes that previously had been reported as cross-resistant to other herbicides. In contrast, biotypes with limited herbicide histories were generally not cross-resistant to metolachlor. These results indicate that there is a high probability of chloroacetamide cross-resistance in populations of herbicide-resistant rigid ryegrass.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl) acetamidemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidepropachlor, 2-chloro-N-(1-methylethyl)-N-phenylacetamideLolium rigidum G. # LOLRIoats, Avena sativa (L.) ‘ Echidna.’Cross-resistancemultiple resistancemetolachloralachlorpropachlorLOLRI
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 42 , Issue 2 , June 1994 , pp. 153 - 157
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

Literature Cited

1. Boldt, L. D. and Barrett, M. 1989. Factors in alachlor and metolachlor injury to corn (Zea mays) seedlings. Weed Technol. 3:303–306.CrossRefGoogle Scholar
2. Burnet, M. W. M., Hart, Q., Holtum, J. A. M., and Powles, S. B. 1994. Resistance to nine classes of herbicides in a biotype of rigid ryegrass (Lolium rigidum). Weed Sci. (in press).CrossRefGoogle Scholar
3. Burnet, M. W. M., Hildebrand, O. B., Holtum, J. A. M., and Powles, S. B. 1991. Amitrole, triazine, substituted urea, and metribuzin resistance in a biotype of rigid ryegrass (Lolium rigidum). Weed Sci. 39:317–323.CrossRefGoogle Scholar
4. Christopher, J. T., Powles, S. B., Holtum, J. A. M., and Liljegren, D. R. 1991. Cross-resistance to herbicides in annual ryegrass (Lolium rigidum) II. Chlorsulfuron resistance involves a wheat-like detoxification system. Plant Physiol. 95:1036–1043.CrossRefGoogle ScholarPubMed
5. Doub, J. P., Wilson, H. P., and Hatzios, K. K. 1988. Comparative efficacy of two formulations of alachlor and metolachlor. Weed Sci. 36:221–226.CrossRefGoogle Scholar
6. Doub, J. P., Wilson, H. P., Hines, T. E., and Hatzios, K. K. 1988. Consecutive annual applications of alachlor and metolachlor to continuous no-till corn (Zea mays). Weed Sci. 36:340–344.CrossRefGoogle Scholar
7. Fuerst, E. P. 1987. Understanding the mode of action of the chloroacetamides and thiocarbamate herbicides. Weed Technol. 1:270–277.CrossRefGoogle Scholar
8. Heap, I. M. and Knight, R. 1986. The occurrence of herbicide cross-resistance in a population of annual ryegrass, Lolium rigidum, resistant to diclofop-methyl. Aust. J. Agric. Res. 37:149–156.CrossRefGoogle Scholar
9. Heap, I. M. and Knight, R. 1990. Variation in herbicide cross-resistance among populations of annual ryegrass (Lolium rigidum) resistant to diclofop-methyl. Aust. J. Agric. Res. 41:121–128.CrossRefGoogle Scholar
10. Heap, J. and Knight, R. 1982. A population of ryegrass tolerant to the herbicide diclofop-methyl. J. Aust. Inst. Agric. Sci. 156–157.Google Scholar
11. LeBaron, H. M. and McFarland, J. 1989. Overview and prognosis of herbicide resistance in weeds and crops. Pages 336–353 in Cireon, H. E., Moberg, W. K., and LeBaron, H. M., eds. A.C.S. Symp. Ser. Managing Resistance to Agrochemicals. Am. Chem. Soc., Washington, DC.Google Scholar
12. LeBaron, H. M., McFarland, J., Simoneaux, B. J., and Ebert, E. 1975. Metolachlor. Pages 335–382 in Kearney, P. C. and Kaufman, D. D., eds. Herbicides: Their Chemistry, Degradation and Mode of Action. 2nd ed. Marcel-Dekker, New York.Google Scholar
13. Matthews, J. M., Holtum, J. A. M., Liljegren, D. R., Furness, B., and Powles, S. B. 1990. Cross-resistance to herbicides in annual ryegrass (Lolium rigidum) I. ACC and ALS activities. Plant Physiol. 94:1180–1186.CrossRefGoogle Scholar
14. Powles, S. B. and Howat, P. D. 1990. Herbicide-resistant weeds in Australia. Weed Technol. 4:178–185.CrossRefGoogle Scholar
15. Powles, S. B. and Matthews, J. M. 1992. Multiple herbicide resistance in annual ryegrass (Lolium rigidum). A driving force for the adoption of integrated weed management. In Denholm, I., Devonshire, A. L., and Hollomon, D. W., eds. Achievements and Developments in Combatting Pest Resistance. Elsevier Press, London.Google Scholar
16. Rowe, L., Rossman, E., and Penner, D. 1990. Differential response of corn hybrids and inbreds to metolachlor. Weed Sci. 38:563–566.CrossRefGoogle Scholar
17. Tardif, F. J., Holtum, J. A. M., and Powles, S. B. 1993. Occurrence of a herbicide-resistant acetyl-coenzyme A carboxylase mutant in annual ryegrass (Lolium rigidum) selected by sethoxydim. Planta 190:176–181.CrossRefGoogle Scholar