Crop(s): Barley
Disease(s): Scald and Net blotch
Resistance management strategy for:
Group 3 |
Demethylation Inhibitors (DMI); |
Group 7 |
Succinate dehydrogenase inhibitors (SDHI); |
Group 7+3 |
SDHI + DMI; |
Group 11+3 |
Quinone outside Inhibitor (QoI) + DMI; |
Group 11+4 |
QoI + Phenylamide; and |
Group 11+7+3 |
QoI + SDHI + DMI. |
Guidelines:
- Not all listed products are registered for both diseases. Ensure the product is registered for the disease being targeted.
- Fungicides should be used as protectant treatments – where there is no more than 5% leaf area infection evident anywhere in the canopy. In high risk disease environments, integrated management approaches should be used to reduce fungicide resistance risk, which may include:
- Removal of stubble;
- Crop rotation (avoid barley on barley);
- 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. This includes foliar sprays as well as in-furrow or seed treatments that have activity on foliar diseases. Combinations of in-furrow and seed treatment are counted as one application.
- Do not apply consecutive applications of Group 11 containing products. This includes in-furrow i.e. if a Group 11+4 or 11+3+7 fungicide has been used in-furrow at planting, the first foliar fungicide spray must not contain a Group 11.
- If a Group 7 seed treatment has been used with foliar activity (as determined by label claims), the first foliar fungicide applied should not contain a Group 7 fungicide. An alternative mode of action fungicide should be applied at typical foliar fungicide timing.
- If a Group 7 or Group 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.
- 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 or Group 11+7+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 and Group 7 fungicides which are known to have comprised resistance status.