Insecticide resistance found in the east | The Land

Gregor Heard

Gregor Heard@grheard

5 Jun 2017, 1 p.m.

Cropping

REDLEGGED earth mites (RLEM) resistant to insecticides have been found in South Australia and authorities believe their spread eastward to Victoria and southern NSW is inevitable.

Aa

  • RLEMs can cause damage to grass species as well as broadleaf plants. Photo: Cesar.
  • Red legged earth mites cluster on a capeweed plant. Photo: Cesar.
  • RLEM on capeweed. Photo: Cesar.
  • The red legged earth mite is relatively easy to identify due to its distinct markings. Photo: Cesar.
  • RLEMs can cause damage to grass species as well as broadleaf plants. Photo: Cesar.
  • Red legged earth mites cluster on a capeweed plant. Photo: Cesar.

Paul Umina, entomologist with Cesar and The University of Melbourne, was not surprised the resistance, first observed in Western Australia over a decade ago, has now been found in other parts of Australia.

“You could say it was just a matter of time,” he said.

Tests have found multiple RLEM populations resistant to insecticides based on synthetic pyrethroids (SPs, such as bifenthrin and alpha-cypermethrin, and organophosphates (OPs), including omethoate and chlorpyrifos.

Dr Umina said in most cases SP resistance was more pronounced than OP resistance

http://www.theland.com.au/story/4708458/insecticide-resistance-found-in-the-east/?cs=4937

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s