Crop(s): Wheat
Disease(s): Septoria blotch
Resistance management strategy for:
Group 3 |
Demethylation inhibitors (DMI); |
Group 7 |
Succinate dehydrogenase inhibitors (SDHI); |
Group 3+7 |
DMI + SDHI; and |
Group 11+3 |
Quinone outside inhibitors (QoI) + DMI. |
Group 21 |
Quinone inside inhibitor (QiI). |
Guidelines:
- Fungicides should be used be used as protectant treatments – prior to symptoms of disease when conditions are conducive to disease development.
- In high-risk disease environments, integrated management approaches should be used to reduce fungicide resistance risk, which may include:
- Removal or burning of stubble;
- Crop rotation (avoid wheat on wheat)
- Control of green bridge volunteers; and
- Use of tolerant and resistant varieties.
- Do not apply more than one application of a Group 7 seed treatment with foliar activity in any two consecutive growing seasons.
- Do not apply more than two applications per growing season of Group 11 or 7 containing products. Foliar sprays and in-furrow or seed treatments, that have activity on foliar diseases, count toward total. Combinations of in-furrow and seed treatment are counted as one application.
- If a Group 7 seed treatment has been used with foliar activity (as determined by label claims), the first foliar fungicide applied must not contain a Group 7 An alternative mode of action fungicide should be applied at typical foliar fungicide timing.
- If a Group 7 or 11 fungicide is being applied as a foliar spray, it must be in a co-formulation or in mixture with a registered mixing partner with a different mode of action, with no known resistance. The mixture partner should also provide effective disease control when used alone on the target disease.
- Do not apply more than three applications containing Group 3 fungicides per growing season. This total of three applications includes DMIs applied as Group 11+3 co-formulations and in-furrow or seed treatments that have activity on foliar diseases. Combinations of in‑furrow and seed treatments are counted as one application.
- Minimise use of Group 3 fungicides which are known to have compromised resistance status.
- Reduced rates, including with multiple applications, must not be used. Always used labelled rates.
- Apply Group 21 preventatively, using a maximum of one Group 21 spray per crop. Do not apply Group 21 solo, they must be applied in combination with an effective tank mix partner from a different group.