Resistance Management Strategy for:

Group 4              (Phenylamide);

Group 28 + 23    (Carbamate plus Benzamide);

Group 40            (Carboxylic acid amide) fungicides; and

Group 49         OSBP (Oxysterol binding protein inhibitor) fungicides

  1. Start disease control early and maintain a regular program using a fungicide from groups other than Group 4, 40 or 49.
  2. When conditions favour disease development, DO NOT wait for disease to appear, but apply two consecutive sprays of a Group 4, 28 + 43, 40 or 49 product at the interval recommended on the label. Then resume the program of sprays using products from a different mode of action group to the Group 4, 28 + 43, 40 or 49 products just applied.
  3. DO NOT apply more than four sprays of a Group 4 or 40 product per season.
  4. DO NOT apply more than three sprays of a Group 28 + 43 or 49 product per crop.Group 49 containing sprays should not consist of more than 33% of the total number of fungicide sprays per crop.
  5. Apply Group 4 and 49 fungicides preventatively and only in mixtures with effective protectant fungicides from a different mode of action group.
  6. Continue alternation of fungicides between successive crops. DO NOT make more than (6) six total applications of a Group 49 product per year on the same area targeting the same disease

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