Banana – Yellow Sigatoka

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Crop(s) Banana
Disease(s) Yellow Sigatoka

 

Resistance management strategy for:

Group 3 Demethylation Inhibitors (DMI);
Group 7 Succinate dehydrogenase inhibitors (SDHI);
Group 7 + 3 SDHI + DMI;
Group 9 Anilinopyrimidine (AP);
Group 11 Quinone outside Inhibitor (QoI); and
Group 21  Quinone inside Inhibitor (QiI).

 

Guidelines 

Far North Queensland 

  1. De-leafing must be conducted in accordance with industry guidelines.
  2. Apply a regular schedule of protectant sprays.
  3. When disease potential is high, apply a maximum of two consecutive Group 3 sprays before changing to a fungicide of a different activity group.
  4. Do not apply more than six Group 3 sprays in any 12-month period. Do not apply any Group 3 sprays in the months of June to September.
  5. Do not apply more than two Group 11 sprays in any 12-month period. Do not apply Group 11 sprays in the months of May to September.
  6. Do not apply more than four Group 7 sprays in any 12-month period. Do not apply Group 7 sprays in the months of June to September.
  7. Do not apply more than three Group 21 sprays in any 12-month period. Exposure to Group 21 fungicides should not exceed 33 per cent of the total protection for the crop. After one Group 21 application, change to a fungicide of a different activity group. The next fungicide should preferably have curative activity and a different mode of action.
  8. Group 7 or 11 fungicides should be applied in mixture with another fungicide from a different activity Group registered for the control of Yellow Sigatoka at the full registered rate.
  9. Do not apply consecutive sprays of Group 7, 11 or 21 fungicides.
  10.  Apply a minimum of two sprays from a different activity group between sprays of a Group 7 or 11 fungicide.
  11. Do not apply more than six Group 9 sprays in any 12-month period.
  1. Do not apply more than two consecutive sprays of a Group 9 fungicide before changing to a fungicide of a different activity group. When using consecutive applications of Group 9 fungicides, follow with at least as many different activity group fungicides before resuming with a Group 9 fungicide.

 

Group Max. number of applications per year Max. number of consecutive sprays Restricted (no spray) periods
3 6 (& no more than 2 of 3 sprays) 2 June to September inclusive
7 4 (& no more than 1 of 3 sprays) Not allowed June to September inclusive
9 6 (& no more than 2 of 4 sprays) 2 No restriction
11 2 (& no more than 1 of 3 sprays) Not allowed May to September inclusive
21 3 (& no more than 1 of 3 sprays) Not allowed No restriction

 

Everywhere except far North Queensland 

  1. When using Group 3 fungicides, apply a maximum of two consecutive Group 3 sprays before changing to a fungicide of a different activity group.
  2. Do not apply more than six Group 3 sprays in any 12-month period.
  3. Do not apply more than four Group 7 or 11 sprays in any 12-month period.
  4. Do not apply consecutive sprays of Group 7, 11 or 21 fungicides.
  5. Apply a minimum of two sprays from a different activity group between sprays of a Group 7 or 11 fungicide.
  6. Do not apply more than six Group 9 sprays in any 12-month period.
  7. Do not apply more than two consecutive sprays of Group 9 fungicides before changing to a fungicide of a different activity group. When using consecutive applications of Group 9 fungicides, follow with at least as many different activity group fungicides before resuming with a Group 9 fungicide.
  8. Do not apply more than three Group 21 sprays in any 12-month period. Exposure to Group 21 fungicides should not exceed 33 per cent of the total protection for the crop. After one Group 21 application, change to a fungicide of a different activity group. The next fungicide should preferably have curative activity.

 

Group Max. number of applications per year Max. number of consecutive sprays Restricted (no spray) periods
 3  6 (& no more than 2 of 3 sprays)  2  No restriction
 7  4 (& no more than 1 of 3 sprays)  Not allowed No restriction
 9  6 (& no more than 2 of 4 sprays)  2  No restriction
 11  4 (& no more than 1 of 3 sprays)  Not allowed  No restriction
 21  3 (& no more than 1 of 3 sprays)  Not allowed  No restriction

 


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URL: https://croplife.org.au/resources/programs/resistance-management/banana-yellow-sigatoka/
Content last updated: July 22, 2026

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

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 22 July 2026. All previous versions of this strategy are now invalid.

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