Resistance Management Strategy for:

Group 3 (DMI); and

Group 11 (Quinone outside Inhibitor) fungicides

  1. DO NOT apply more than three consecutive Group 3 sprays alone, before changing to a fungicide of a different activity group. 

    Apply a maximum of five Group 3 sprays per season.

  2. DO NOT apply Group 11 products as more than 50% of the total number of sprays in any one season, up to a maximum of three sprays of Group 11. 

    DO NOT apply more than two consecutive applications of a Group 11 spray. If two consecutive applications of a Group 11 spray are applied, they must be followed by at least the same number of sprays from an alternative chemical group.


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