Guidelines:

  • Rotate insecticide groups.
  • Do not apply consecutive sprays of products from any one insecticide group
Crop Stage

Group*

Chemical Sub-group Example chemical
Seed Treatment (or in-furrow)

4A

1B

2B

Neonicotinoids or organophosphates or phenylpyrazoles Imidacloprid   dimethoate   fipronil
Bare Earth (Preemergent)

1B

3A

organophosphates or synthetic pyrethroids omethoate   bifenthrin
Early Season (Autumn when limited green growth)

3A

1B

synthetic pyrethroids or organophosphates alpha-cypermethrin   chlorpyrifos
Spring

1B

3A

organophosphates or synthetic pyrethroids Omethoate   gamma-cyhalothrin

*Groups are the International Resistance Action Committee Insecticide Groups based on mode of action of the insecticides - refer MoA tables.

If both autumn and spring applications are needed, alternate between synthetic pyrethroids and organophosphates

Timing of Sprays

  1. Monitor Redlegged Earth Mite (RLEM) activity carefully and only treat if damage has reached threshold levels.
  2. One well timed spray in Autumn or Spring will maximise effectiveness of treatment.

Placement of Sprays

  1. Apply perimeter sprays where infestations are concentrated on the edge of fields.
  2. Use blanket sprays where appropriate.
Cultural Practices
  1. Heavy grazing or cutting for hay or cultivation will reduce mite numbers.
  2. Develop damage thresholds.
  3. Rotate crops and pastures that are more tolerant to the pest.
  4. Encourage predator survival by judicious use of insecticides.
  5. Control alternative hosts such as Capeweed and Paterson's curse.
For more detail on resistance management for RLEM in grain crops and pastures, refer to: http://ipmguidelinesforgrains.com.au/ipm-information/resistance-management-strategies/  

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