Pasture Winter Crops – Redlegged Earth Mite; RLEM (Halotydeus destructor)

Crop:         Pasture Winter Crops
Insect(s): Redlegged Earth Mite; RLEM (Halotydeus destructor)


  • 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
neonicotinoids or
organophosphates or
Bare Earth (Pre-emergent) 1B
organophosphates or
synthetic pyrethroids
Early Season (Autumn when limited green growth) 1B
organophosphates or
synthetic pyrethroids
Spring 1B
organophosphates or
synthetic pyrethroids

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

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:

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: July 16, 2021

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 16 July 2021. All previous versions of this strategy are now invalid.