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|Title:||Evolution of herbicide resistance in weeds: initial frequency of target site-based resistance to acetolactate synthase-inhibiting herbicides in Lolium rigidum|
|Citation:||Heredity, 2002; 88(Part 1):8-13|
|Publisher:||Blackwell Science Ltd|
|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; sulfometuron-methyl; imazapyr; acetolactate synthase|
|Description:||© 2002 Nature Publishing Group|
|Appears in Collections:||Agriculture, Food and Wine publications|
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