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Russian wheat aphids have progressed further west

  • Borden
  • Jacup
  • Lake King
  • Mount Madden
  • Cowerup
Russian wheat aphids
Russian wheat aphids. Photo courtesy of: DPIRD.

James Bee (Elders) reports finding a Russian wheat aphid (RWA) in volunteer wheat in a pasture paddock south east of Borden. James found 2 plants with visible streaking (picture below) and a live RWA.

A wheat leaf showing striping that is symptomatic of Russian wheat aphid feeding.
A wheat leaf showing striping that is symptomatic of Russian wheat aphid feeding. Photo courtesy of: James Bee (Elders).
Russian wheat aphids on wheat.
Russian wheat aphids on wheat. Photo courtesy of: Nicky Tesoriero (Ceres Agronomy).

Nicky Tesoriero (Ceres Agronomy) has found RWA on tillering Illabo wheat near Jacup. The seed had not been treated with an insecticidal seed dressing.

RWA colonies have also been found in volunteer barley in a pasture paddock at Lake King.

Winged RWA have been captured, as part of DPIRD aphid trapping program, on traps at Mount Madden.

RGT Planet barley with leaf streaking that is typically caused by Russian wheat aphids.
RGT Planet barley with leaf streaking that is typically caused by Russian wheat aphids. Photo courtesy of: James Bistrup (Elders).

James Bidstrup (Elders) has found RWA feeding symptoms on tillering RGT Planet barley near Cowerup. No seed treatment had been applied.

A screenshot of the PestFax map displaying Russian wheat aphid reports received in the past 2 months.
A screenshot of the PestFax map displaying Russian wheat aphid reports received in the past 2 months. Map courtesy of: DPIRD.

RWA are actively moving around the landscape. For a visual representation of RWA reports this season and its gradual spread further west into WA refer to the PestFax map.

Monitoring and managing Russian wheat aphids

Monitor crops for RWA from growth stage (GS) 30 or start of stem elongation.

This aphid is manageable but growers are reminded to consider applying sprays only when threshold levels are reached. A RWA threshold calculator is available on GRDC’s Russian wheat aphid page. 

For a list of insecticides registered for use on aphids (including RWA), see DPIRD’s 2021 autumn winter Insecticide Guide or refer to the Australian Pesticides and Veterinary Medicines Authority (APVMA) products database for all chemical control options available for Russian wheat aphids in grains crops

 

Please continue to report any suspect detections of RWA, or RWA damage, by using DPIRD’s PestFax Reporter app.

To read about previous RWA activity reported this season, refer to the 2021 PestFax articles in Issue 5 Russian wheat aphids are now winged and Issue 2 Russian wheat aphid found in barley regrowth down south.

For more information on RWA, refer to the:

For more information on Russian wheat aphids, or other aphids, contact Research Scientist Svetlana Micic, Albany on +61 (0)8 9892 8591.

 

 

Article authors: Cindy Webster (DPIRD Narrogin) and Svetlana Micic (DPIRD Albany).