Resistance Management Strategy for

Group 2 (Dicarboximide);

Group 7 SDHI (Succinate dehydrogenase inhibitors)

Group 9 (Anilinopyrimidine);

Group 12 (Phenylpyrroles); and

Group 17 (Hydroxyanilide) fungicides

    1. Apply a program of protectant fungicides during flowering.  If conditions favour disease development during this period, use a Group 2, 9, 12 or 17 fungicide.

    2. DO NOT apply more than two successive sprays of Group 2, 9, 12 or 17 fungicides.

    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.If three or fewer Botrytis fungicide sprays are applied per crop, use only one spray containing a Group 9 fungicide.  If four to six sprays are applied per crop use a maximum of two sprays containing Group 9 fungicides.  If seven or more sprays are applied per crop use a maximum of three sprays containing Group 9 fungicides.

    5. If three or fewer Botrytis fungicide sprays are applied per crop, use only one spray containing a Group 12 fungicide.  If four to six sprays are applied per crop use a maximum of two sprays containing Group 12 fungicides.  If seven or more sprays are applied per crop use a maximum of three sprays containing Group 12 fungicides.


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