Aphid And Insecticide Resistance Management In Grain Crops

GRDC - Marielle Babineau, Anthony Van Rooyen, James Maino, Jenny Reidy-Crofts, Owain Edwards, Paul Umina

Type: Research Paper
Knowledge level: Advanced

Farm Table says:

The authors of this paper note in the conclusion: "Each aphid species will show different levels of resistance (or sensitivity) to different insecticides; for example, GPA have widespread resistance to organophosphate, neonicotinoids, carbamates and pyrethroids, while oat aphid have lower sensitivity to pyrethroids. Therefore, the proper identification of aphid species in a paddock is crucial to determine the risk of resistance, and therefore, the selection of management strategies. This key step helps to optimise inputs (financial, labour, time) for efficient management." Please access the full paper via the link below if this research interests you.

The take home messages from this GRDC funded research are below. Please access the full paper via the link below for methodology, references, acknowledgements and discussion.

Take home messages from the paper include:

  • A high number of green peach aphid populations are resistant to pyrethroids, carbamates, organophosphates, and neonicotinoids.
  • Multiple green peach aphid populations from a specific region showed a temporary sensitivity shift to sulfoximines (sulfoxaflor, Transform®) due to an unknown mechanism.
  • Significant differences in pyrethroid sensitivity were found between populations of oat aphid.
  • The green peach aphid insecticide resistance management strategy has been updated and should be consulted by growers and advisers.
  • Rotate available insecticide modes of action (new modes of action to be registered in coming years).
  • Controlling green bridges around paddock and sowing into standing stubble is recommended.
  • Proper identification of aphid species is necessary to assess risk of resistance and choice of insecticide to be used.
  • Monitoring of aphid predators and parasitoids allows chemical-free control of insecticide resistant aphids.

2020 - Australia - GRDC - Marielle Babineau, Anthony Van Rooyen, James Maino, Jenny Reidy-Crofts, Owain Edwards, Paul Umina
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