Characterisation of target-site resistance to ACCase-inhibiting herbicides in the weed Alopecurus myosuroides (black-grass)

A - Papers appearing in refereed journals

Moss, S. R., Cocker, K. M., Brown, A. C., Hall, L. and Field, L. M. 2003. Characterisation of target-site resistance to ACCase-inhibiting herbicides in the weed Alopecurus myosuroides (black-grass). Pest Management Science. 59 (2), pp. 190-201.

AuthorsMoss, S. R., Cocker, K. M., Brown, A. C., Hall, L. and Field, L. M.
Abstract

Resistance to aryloxyphenoxypropionate (AOPP), cyclohexanedione (CHD) and phenylurea herbicides was determined in UK populations of Alopecurus myosuroides Huds. Two populations (Oxford AA1, Notts. A1) were highly resistant (Resistance indices 13-->1000) to the AOPP and CHD herbicides fenoxaprop, diclofop, fluazifop-P and sethoxydim, but only marginally resistant to the phenylurea, chlorotoluron. Analyses of acetyl coenzyme A carboxylase (ACCase) activity showed that an insensitive ACCase conferred resistance to all the AOPP/CHD herbicides investigated. Another population, Oxford SI, showed no resistance to sethoxydim at the population level, but contained a small proportion of plants (<10%) with an insensitive ACCase. Genetic studies on the Notts A1 and Oxford S1 populations demonstrated that target site resistance conferred by an insensitive ACCase is monogenic, nuclearly inherited with the resistant allele showing complete dominance. Investigations of the molecular basis of resistance in the Notts A1 population showed that sethoxydim resistance in A myosuroides was associated with the substitution of an isoleucine in susceptible with a leucine in resistant plants, which has also been found in three other resistant grass-weed species (Setaria viridis (L) Beauv, Avenafatua L, Lolium rigidum Gaud). (C) 2003 Society of Chemical Industry.

KeywordsAgronomy; Entomology
Year of Publication2003
JournalPest Management Science
Journal citation59 (2), pp. 190-201
Digital Object Identifier (DOI)doi:10.1002/ps.623
PubMed ID12587873
Open accessPublished as non-open access
Funder project or code431
438
514
508
Herbicide resistance management: evaluation of strategies (HeRMES)
FunderDepartment of Environment, Food and Rural Affairs
Home-Grown Cereals Authority
Output statusPublished
Publication dates
Online07 Jan 2003
Publication process dates
Accepted18 Aug 2002
Copyright licensePublisher copyright
PublisherWiley
ISSN1526-498X

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