Broccoli and Cauliflower – White blister

Crop(s):          Broccoli and Cauliflower

Disease(s):     White blister

Resistance management strategy for:

Group 4 Phenylamide;
Group 11 Quinone outside inhibitor (QoI);
Group 21 Quinone inside inhibitor; and
Group 28+43 Carbamate + benzamide.


  1. Apply fungicides from Group 4, 11, 21 or 28+43 in a preventative strategy when conditions favour disease development. Applications made within the nursery count towards the total number of applications allowed per crop.
  2. Always apply Group 4 in mixtures for foliar applications. Apply no more than two consecutive sprays of products containing Group 4
  3. Apply no more than two consecutive sprays of fungicides containing Group 11 or 21. Consecutive sprays should only be adopted if these groups are applied in mixture with an alternative mode of action fungicide. Group 11 or 21 fungicides should be applied in strict alternation with other fungicide groups if being applied without mix partners.
  4. Do not apply more than two applications of Group 4 and Group 11 fungicides per crop.
  5. Do not apply more than three applications of a Group 21 or 28+43 fungicide per crop.

Content last updated: June 26, 2024

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

The information given in this strategy is provided in good faith and without any liability for loss or damage suffered as a result of its application and use. Advice given in this strategy is valid as at 26 June 2024. All previous versions of this strategy are now invalid.