Apple, Pear – Apple and Pear scab

Crop(s):          Apple, Pear

Disease(s):    Apple and Pear scab

Resistance Management Strategy for:

Group 3             Demethylation inhibitors (DMI);
Group 7             Succinate dehydrogenase inhibitors (SDHI);
Group 7 + 11    SDHI + QoI
Group 9             Anilinopyrimidines (AP);
Group 11           Quinone outside inhibitors (QoI); and
Group U12        Guanidines.

1. Do not apply more than four sprays per season of Group 3 fungicides as solo products. If more sprays containing Group 3 are required, apply as a tank mixture with a non cross resistant fungicide.
2. Do not apply more than four sprays per season of products containing Group 9. In locations where resistance has been reported, use a Group 9 only in mixture with a registered alternative mode of action for which resistance is not known.
3. Do not  apply more than three sprays per season of Group 7 or Group 11 fungicides.
4. If two consecutive applications of Group 7, 9 or Group 11  fungicides are used, then they must be followed by at least the same number of applications of fungicide(s) from a different mode of action group(s) before the same group is used again, either in the current or following season.
5. When mixtures are used for resistance management, applied as tank mix or as a co-formulated mixture, the mixture partner should provide effective disease control when used alone on the target disease and must have a different mode of action.
6. Pomefruit spray guidelines for SDHI fungicides:

1. To prevent or delay the onset of resistance to Group U12, do not apply more than three consecutive sprays of Group U12, and no more than a total of six Group U12 sprays per season.
2. If more sprays are required, tank mix Group U12 with a protectant product at the registered rate.