Disease(s): Powdery mildew
Resistance Management Strategy for:
Group 3 Demethylation Inhibitors (DMI);
Group 7 Succinate dehydrogenase inhibitors (SDHI);
Group 7+12 SDHI + phenylpyrroles
Group 11 Quinone outside Inhibitor (QoI); and
Group U6 Phenyl-acetamide.
- Apply a program of protectant fungicides from early crop establishment and maintain a regular spray program throughout the crop growing cycle. If weather conditions favour powdery mildew development, use a Group 3 or 11 fungicide.
- Do not apply more than four Group 3 sprays per season.
- Do not apply more than two consecutive sprays of Group 3 fungicides, including from one season to the next.
- If applying Group 7 fungicides (including 7+12), do not apply more than two consecutive sprays before changing to another group.
- Do not apply more than three Group 7 sprays per season. If consecutive sprays are used, then use the same number of sprays of an alternative group before using another Group 7, including sprays in consecutive seasons.
- Apply Group 11 fungicides preventively.
- Do not apply consecutive sprays of Group 11 fungicides, including from one season to the next.
- If three or fewer powdery mildew fungicide sprays are applied per crop, use only one spray containing a Group 11 fungicide. If four to six sprays are applied per crop, use no more than two sprays containing a Group 11 fungicide. If seven or more sprays are applied per crop use a maximum of three sprays containing a Group 11 fungicide. Do not apply more than three Group 11 sprays per season.
- Do not use Group 3 fungicides curatively.
- No specific resistance management strategy has been developed for low-risk fungicides, including those in Group M and BM. These products should be included in a management strategy as per label recommendations.