Resistance Management Strategy for:
Group 3: Demethylation inhibitors (DMI);
Group 5: Amines (morpholines);
Group 7: Succinate dehydrogenase inhibitors (SDHI);
Group 11: Quinone outside inhibitors (QoI);
Group 11+3: QoI + DMI (refer to Group 11 in table)
Group 13: Aza-napthalenenes;
Group U6: Phenyl-acetamide; and
Group 50: Actin disruptors (aryl-phenyl-ketone).
1. Apply all these fungicides preventatively.
2. Consecutive applications include from the end of one season to the start of the next.
3. Mixtures – co-formulations or tank mixes with label rate of alternative mode of action.
|Maximum number of consecutive sprays when applied as the only fungicide||2||2||None||None||2||2||2|
|Maximum number of consecutive sprays when applied as a tank-mix or co-formulant||2||2||2||2||2||2||2|
|Maximum number of sprays per season||3||3||3||2||3||2||4|
4. Medium to high risk fungicides (Group 7 and 11) if used consecutively should be applied in a mixture or co-formulation with a registered, alternative mode of action for which resistance is not known – where these fungicides have been routinely used for many seasons, field research indicates there is an increased risk of powdery mildew resistance. To ensure effective powdery mildew control in these circumstances, either use alternative modes of action or apply in mixtures.
5. Group 11:
a. if applied alone, as the only fungicide, do not make consecutive applications, apply a maximum of 2 sprays per season.
b. if applied with another fungicide, can be used consecutively except where they have been used routinely for many seasons, apply a maximum of 2 sprays per season.
Content last updated: July 16, 2021