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

Guidelines 

1. Rotate between registered insecticides that have different modes of action (e.g., Groups 1, 4, 9, 12A (cotton crop only), 23, 28 and 29. 
2. DO NOT apply consecutive applications of Group 4C insecticides for control of aphids. 
3. Do not apply more than two sequential 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. 
4. With post-spray monitoring, do not re-treat a spray failure with a product from the same mode of action group. 
5. Do not follow a seed/seedling/soil treatment with a foliar application from the same mode of action group. 
6. The Modes of Action (Groups) and registered insecticides for control of cotton/melon aphid and/or green peach aphid are listed below: 

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

Notes 

• There is known cross-resistance between Groups 1A and 1B. Rotate between Group 1 and Group 4, 9B, 9D, 12A, 23, 28 and 29. 
• Consecutive applications of a Group 4A product may be made only if no other effective option is available – either because: 
• no other group is registered in the crop; or 
• the target pest is resistant to the other Groups. 
• Seek advice from the manufacturers and/or government advisory services to determine local resistance levels for particular mode of action Groups. 
• Do not exceed the maximum number of applications permitted on the insecticide label. 
• 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. 
• When using insecticides/aphicides to control other pests consider the effect on beneficial insects and the potential to flare aphid populations. 
• For more information about insecticide resistance in the green peach aphid refer to http://cesaraustralia.com/latest-news/all/insecticide-resistance-in-the-green-peach-aphid. 
• 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 https://ipmguidelinesforgrains.com.au/ipm-information/resistance-management-strategies/, https://grdc.com.au/resources-and-publications/all-publications/publications/2024/green-peach-aphid-best-management-practice-guide, and https://thebeatsheet.com.au/key-pests/aphids. 

Notes regarding the application of insecticides: 

To ensure the most effective control of the pest: 

1. Product labels should at all times be carefully read and adhered to; 
2. Full recommended rates of registered insecticides should always be used; and 
3. Ensure good coverage of the target area to maximise contact.