Resistance Management Strategy for:

  • Group 3 (DMI);
  • Group 7 SDHI (Succinate dehydrogenase inhibitors);
  • Group 9 (Anilinopyrimidine);
  • Group 11 (Quinone outside Inhibitor) and
  • Group 12 (Cell membrane disruption) fungicides.
  1. To prevent or delay the onset of resistance to Group 3 fungicides, DO NOT apply more than four Group 3 sprays alone per season. If more sprays, are required apply a tank mix of a Group 3 with a Group 9 or suitable product from Groups M or M1 to M9, or apply a registered product containing a combination of a Group 3 and a Group 9 fungicide.
  2. DO NOT apply more than four sprays per season of Group 9 fungicides (solo products). DO NOT apply more than four sprays per season of products containing a combination of a Group 9 and a Group 3 fungicide and no more than two consecutive applications. DO NOT apply more than three sprays per season of Group 7 or Group 11 fungicides.  If two consecutive applications of Group 7 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 group(s) before a Group 7 or Group 11 fungicide is used again, either in the current or following season. Where spray programs include solo Group 9 products and combination products, the maximum cumulative number of applications is four per season and no more than two consecutive applications. In locations where resistance has been reported use a Group 9 only in mixture with an effective non cross-resistant scab fungicide.
  3. To prevent or delay the onset of resistance to Group U 12, DO NOT apply more than three consecutive sprays of Group U 12, and no more than a total of six Group U12 sprays per season. If more sprays are required, tank mix Group U 12 with a protectant product at the registered rate.

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