Resistance Management Strategy for:

Group 2 (Dicarboximide);

Group 3 (DMI);

Group 7 SDHI (Succinate dehydrogenase inhibitors) and

Group 9 (Anilinopyrimidine) fungicides

    1. If applying Group 2 or Group 3 fungicides, DO NOT apply more than two consecutive sprays of fungicides from the same group before changing to another group.

    2. DO NOT apply more than three sprays of a Group 9 fungicide per season. If two or three consecutive sprays are applied, they must be followed by at least the same number of sprays from an alternative chemical group, including from one season to the next.

    3. If applying Group 7 fungicides, 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.

    4. A post-harvest treatment should also be counted as an application.

    5.The last blossom blight spray and the first pre-harvest brown rot spray should be regarded as consecutive applications.

    6. The spray program should be considered and the strategy applied on a whole-orchard basis.


CropLife Australia’s Resistance Management Strategies provide a guide for crop protection product rotation through product groups.  The strategies are a useful tool that supports farmers’ adoption of resistance management.

All crop protection products must be handled and applied strictly as specified on the product label or APVMA permits.  These Resistance Management Strategies do not replace product labels.  They are a guide only and do not endorse particular products, groups of products or cultural methods in terms of their performance.  It is important to check with the Australian regulator’s (APVMA) product database for contemporary information on products and active constituents.  The database can be sourced through www.apvma.gov.au