Various – Cotton/Melon Aphid (Aphis gossypii) and Green Peach Aphid (Myzus persicae)

Crop:         Various
Insect(s):  Cotton/Melon Aphid (Aphis gossypii) and Green Peach Aphid (Myzus persicae)


  1. Rotate between registered insecticides that have different modes of action (eg. Groups 1, 4, 9, 12A (cotton crop only), 23, 28 and 29).
  2. DO NOT apply consecutive applications of insecticides that have the same mode of action within and between seasons or exceed the recommended maximum number of applications in a crop.
  3. DO NOT follow a seed/seedling/soil treatment with a foliar application from the same Group.
  4. The Modes of Action (Groups) and registered insecticides for control of cotton/melon aphid and/or green peach aphid are listed below.
Group* Chemical sub-group Example chemical
1A Carbamates pirimicarb
1B Organophosphates methamidophos
4A Neonicotinoid imidacloprid
4C Sulfoximines sulfoxaflor
9B Pymetrozine pymetrozine
9D Pyropenes afidopyropen
12A Diafenthiuron diafenthiuron
23 Spirotetramat spirotetramat
28 Diamide cyantraniliprole
29 Flonicamid flonicamid

*Refer: CropLife Australia Expert Committee on Insecticide Resistance Mode of Action Classification for Insecticides


1. There is known cross-resistance between Groups 1A and 1B.  Rotate between Group 1 and Group 4, 9B, 12A, 23, 28 and 29.

2. Consecutive applications of a Group 4A and Group 4C product may be made only if no other effective option is available – either because

a) no other group is registered in the crop or

b) the target pest is resistant to the other Groups.

3. Seek advice from the manufacturers and/or government advisory services to determine local resistance levels for particular mode of action Groups.

4. DO NOT exceed the maximum number of applications permitted on the insecticide label.

5. When using insecticides/miticides to control other pests, consider the chemical group in relation to contributing to resistance development of Cotton/Melon Aphid and Green Peach Aphid.

6. When using insecticides/aphicides to control other pests consider the effect on beneficial insects and the potential to flare aphid populations.

7. For more information about insecticide resistance in the green peach aphid refer to

8. For more detail on resistance management of aphids in cotton refer to the current Cotton Pest Management Guide or for more detail on resistance management for Green Peach Aphid in grain refer to: or

Notes regarding the application of insecticides:

  1. To ensure the most effective control of the pest:
  • Product labels should at all times be carefully read and adhered to;
  • Full recommended rates of registered insecticides should always be used; and
  • Ensure good coverage of the target area to maximise contact.

Content last updated: June 30, 2022

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 30 June 2022. All previous versions of this strategy are now invalid.