Case 1: Metabolic Resistance (NTSR, Non-Target Site Resistance) to the ACCase Inhibitor Pinoxaden (Axial® 50)
The investigated biotype shows resistance to Axial® 50. A PCR analysis of the ACCase gene reveals: no target-site resistance (TSR), all tested plants show the wild type. Notably, Cycloxydim (Focus® Ultra), also an ACCase inhibitor, is still effective.
Strategy in Crop Rotation:
- Use of Focus® Ultra in oilseed rape
- Use of MaisTer® Power in maize
- Use of Broadway® or AVOXA® in wheat
- Weakness in barley: no herbicides available for post-emergence treatment
Important: Axial® 50 should definitely not be used in barley at this site. The pressure of the wild oat must be reduced agronomically before sowing. A post-emergence treatment with Axial® 50 would only accelerate the selection of metabolic resistance mechanisms and jeopardize the other active substances in cereal cultivation. To suppress the mechanism, a loosened crop rotation with broadleaf crops is essential, where products such as Focus® Ultra, Select® 240 EC, and MaisTer® Power are used. These products can actively suppress metabolic resistance.
