Strawberry runner production – Powdery mildew

Crop(s):          Strawberry runner production
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 8*        Hydroxy-(2-amino-) pyrimidines;
Group 11        Quinone outside inhibitor (QoI);
Group 13*      Aza-naphthalenes; and
Group U6       Phenyl-acetamide.

1. This strategy is for the additional range of compounds available to strawberry runner producers under permit.
2. 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.
3. Do not use Group 3 fungicides as eradicants, (once symptoms are visible).
4. Do not apply more than four Group 3 sprays per season.
5. Do not apply more than two consecutive sprays of Group 3 fungicides, including from one season to the next.
6. If applying Group 7 fungicides (including 7+12), do not apply more than two consecutive sprays before changing to another group.
7. 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.
8. Apply Group 11 and U6 fungicides preventively.
9. Do not apply consecutive sprays of Group 11 and U6 fungicides, including from one season to the next.
10. 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.
11. Do not use Group 3 fungicides curatively.
12. Fungicides from Group 8 and 13 are available for use on strawberry runner crops under individual permits from the APVMA.
13. Apply a maximum of two (2) Group U6 sprays per season.
14. Apply a maximum of four (4) Group 8 or 13 sprays per season. Do not apply more than two consecutive sprays before changing to another group.
15. 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.

* Currently only available under temporary permit. Always check that permits are valid prior to use.