Confirmation of an ALS-resistant <em>Lolium perenne</em> population in Northern Germany

Authors

  • Wanja Konstantin Rüstner Christian-Albrechts-Universität zu Kiel, Institut für Phytopathologie, Kiel
  • Holger Klink Christian-Albrechts-Universität zu Kiel, Institut für Phytopathologie, Kiel
  • Joseph-Alexander Verreet Christian-Albrechts-Universität zu Kiel, Institut für Phytopathologie, Kiel

Keywords:

Lolium perenne, resistance, TSR, NTSR, perennial ryegrass, ACCase, ALS, clethodim, clodinafop, cycloxydim, iodosulfuron, mesosulfuron, pinoxaden, propoxycarbazone, pyroxsulam/florasulam, isoproturon

Abstract

In the east of Schleswig-Holstein, in the recent years on a farmland were grown winter barley, winter oilseed rape and winter wheat in a three-year crop rotation. In autumn and spring 2014/15, severe problems to control perennial ryegrass (Lolium perenne) were recognized for the first time in field-trials. Based on these observations and the use of the same herbicides in recent years, the suspect population was tested for a possible herbicide resistance. After a plant sampling in the spring of 2015 and subsequent greenhouse bioassays with different doses of ACCase and ALS inhibitors, followed by a molecular resistance testing, a hitherto unknown ALS-resistant weed species was confirmed in Schleswig-Holstein. In addition to a marked resistance to ALS inhibitors, a poten­tial metabolic resistance in the form of first effect losses against aryloxyphenoxy-propionates and cle­thodim was observed in the suspect population.

DOI: 10.5073/JfK.2016.05.01, https://doi.org/10.5073/JfK.2016.05.01

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Published

2016-05-01

Issue

Vol. 68 No. 5 (2016)

Section

Original Article

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