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) and combinations of Group 3;
Group 13: Aza-napthalenenes;
Group U6: (PHenyl-acetamide); and
Group U8: Actin disruptors (aryl-phenyl-ketone) fungicides
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||2||2||none||below||2||2||2|
|Maximum number of sprays per season||3||3||3||2||3||2||4|
4. Group 11- 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 – If applied alone, do not make consecutive applications.
6. Group 11 – apply a maximum of 2 sprays per season, including mixtures.
Content last updated: June 22, 2018