Passionfruit – Alternata Spot

Crop(s):          Passionfruit

Disease(s):     Alternata spot (Alternaria spp.)

Resistance Management Strategy for:

Group 2           Dicarboximides;
Group 7+3      Succinate dehydrogenase inhibitor (SDHI) + Demethylation inhibitors (DMI); and

Group 11         Quinone outside inhibitors (QoI). 

  1. Maintain a protective cover with a protectant fungicide such as mancozeb.
  2. Limit the use of Group 2 to strategic periods, i.e. before, during and after extended wet periods. 
  3. Always tank mix the Group 2 fungicide with a protectant such as mancozeb. 
  4. Do not apply more than four Group 2 sprays in a season.
  5. The total number of Group 7+3 and Group 11 sprays should be no more than one-third of the total number of fungicide sprays per season. 
  6. Do not apply more than two consecutive applications of a Group 11 spray. 
  7. If two consecutive applications of a Group 7+3 or Group 11 spray are applied, they must be followed by at least the same number of sprays from an alternative chemical group.

Content last updated: July 14, 2023

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 14 July 2023. All previous versions of this strategy are now invalid.