Development of resistance of Apera spica-venti (L.) P. Beauv. (Loose silky-bent) in Lower Saxony in 2013 - also increasingly against Pinoxaden

Abstract

Herbicide resistance has increased dramatically all over the world. Especially North America, South America and Australia are affected. In the last few years also in Europe different active ingredient groups become more and more ineffectively. The risk of resistance is very high for the ACC-ase inhibitors (Group A), the photosynthese- inhibitors (Group C) and by now also for the ALS - inhibitors (Group B). In almost every agricultural region of Lower Saxony the loose silky-bent grass (Apera spica-venti) shows resistance to at least one mode of action. Since 2005 especially in the lower saxonian region between Osnabrück, Hannover and Braunschweig resistance in loose silky-bent grass against the ALS- inhibitors occurs. 2012 target site resistance against Pinoxaden was found for the first time. In the last few years also in Europe different active ingredient groups became more and more ineffectively.

Keywords

• grass weed control
• herbicide resistance management
• loose silky-bent grass