DMI – triazole resistance appears to be driven by the number of applications, so risk can be reduced by minimising the number of applications per season.
Key points
- Apply DMIs – triazoles in mixtures that contain at least one other fungicide from an alternative mode-of-action (MOA) group that has comparable efficacy against the target pathogen.
- “Stacked” DMI – triazole products, where two active ingredients from the same MOA group are applied together will need an additional mixing partner from an alternative MOA that has comparable efficacy against the target pathogen.
- Alternate DMI – triazole active ingredients both within and between seasons.
- If you have used prothioconazole (including as part of a “stacked” product) at GS 32 (T1), use a mefenitrifluconazole or epoxiconazole based product at GS 39 (T2) and GS 59 (T3).
- If you have used mefenitrifluconazole at GS 32 (T1), use a prothioconazole or epoxiconazole based product at GS 39 (T2) and GS 59 (T3).
- If you have used epoxiconazole (including as part of a “stacked” product) at GS 32 (T1), use a mefenitrifluconazole or prothioconazole based product at GS 39 (T2) and GS 59 (T3).
- Use at appropriate doses to ensure effective disease control.