Journal für Kulturpflanzen - Journal of Cultivated Plants (2016) 68, 117-124

Wanja Konstantin Rüstner, Holger Klink and Joseph-Alexander Verreet (2016)
Nachweis einer ALS-resistenten Lolium perenne-Population in Norddeutschland
[Confirmation of an ALS-resistant Lolium perenne population in Northern Germany]
Journal für Kulturpflanzen - Journal of Cultivated Plants 68 (5), 117-124
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 2015and 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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)
Link to article at publishers website
Database assignments for author(s): Joseph-Alexander Verreet

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lolium perenne multiflorum (weed)	Barley (Hordeum vulgare)	Germany