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Type: Journal article
Title: Evolution of herbicide resistance in weeds: initial frequency of target site-based resistance to acetolactate synthase-inhibiting herbicides in Lolium rigidum
Author: Preston, C.
Powles, S.
Citation: Heredity, 2002; 88(Part 1):8-13
Publisher: Blackwell Science Ltd
Issue Date: 2002
ISSN: 0018-067X
Abstract: The frequency of individuals resistant to two acetolactate synthase (ALS)-inhibiting herbicides in three previously untreated populations of Lolium rigidum was determined. The frequency of individuals resistant to the sulfonylurea herbicide sulfometuron-methyl varied from 2.2 x 10⁻⁵ to 1.2 x 10⁻⁴ and the frequency of individuals resistant to the imidazolinone herbicide imazapyr varied from 1 x 10⁻⁵ to 5.8 x 10⁻⁵ depending on the population. Application of sulfometuron-methyl selected individuals with a herbicide-insensitive ALS, which was also cross-resistant to imazapyr. The high initial frequency of individuals resistant to ALS-inhibiting herbicides in L. rigidumpopulations never previously exposed to these herbicides helps explain the rapid evolution of herbicide resistance in this species once ALS-inhibiting herbicides were used.
Keywords: Lolium rigidum
herbicide resistance
resistance evolution
acetolactate synthase
Description: © 2002 Nature Publishing Group
DOI: 10.1038/sj.hdy.6800004
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Appears in Collections:Agriculture, Food and Wine publications
Aurora harvest 6

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