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PestFax

Barley disease update

Barley leaf rust

  • Kellerberrin
  • Lake Grace
  • Kojaneerup (South Stirlings)
  • Kendenup
  • Coomalbidgup
  • Gibson

Dan Taylor (DKT Rural Agencies) has reported finding low levels of barley leaf rust (BLR) in Rosalind barley near Kellerberrin. The plants are at ear emergence.

A consultant has reported seeing a little bit of BLR in Bass barley near Lake Grace. It was only one ‘speck’ but was the first BLR he had seen so far.

Barley leaf rust pustules.

Barley leaf rust pustules. Photo courtesy of: Theo Van Niekerk (Katanning Soil Nutrition Service).

Theo Van Niekerk (Katanning Soil Nutrition Service) has reported finding BLR in Flinders barley south of Kojaneerup (South Stirlings). The crop was at stem elongation stage. Theo has also reported BLR in a tillering Flinders barley crop near Kendenup.

Barley leaf rust on flag leaf -1.

Barley leaf rust on flag leaf -1. Photo courtesy of: Andrea Hills (DPIRD).

Plant pathologist Andrea Hills (DPIRD) has found BLR in booting Compass barley in a broad scale trial near Coomalbidgup. Andrea was struggling to find any BLR pustules in the LaTrobe barley next to it. Andrea has also found BLR in regrowth barley in a laneway near Gibson.

Growers and consultants are strongly urged to participate in the Australian cereal rust survey and submit rust samples to the University of Sydney, Private Bag 4011, Narellan, NSW 2567 for pathotype testing.

For more information on BLR and how to manage it refer to the department’s Diagnosing barley leaf rust page and the 2017 PestFax newsletter Issue 4 Barley and wheat leaf rust warning for 2017 article.

Barley powdery mildew

  • Brookton

David Stead (Anasazi Agronomy) has reported that powdery mildew is just starting to creep into Bass barley around Brookton.

For more information on barley powdery mildew refer to the department’s Management of barley powdery mildew in 2017 page and 2017 PestFax newsletter Issue 10 Barley disease update and current management recommendations article

Barley spot-type net blotch

  • Wongan Hills

Brett Lines (Landmark) has reported finding spot-type net blotch (STNB) in a Latrobe barley crop near Wongan Hills. The crop had Intake® in furrow and Evergol® Prime seed treatment.

For more information on barley STNB refer to the department’s Managing spot type net blotch in continuous barley page.

Fungicide choice needs to take into account the diseases present on a crop. Where a variety is susceptible to both of the diseases present, a fungicide that is registered to control both of them is required. For fungicide information refer to the department’s Registered foliar fungicides for cereals in Western Australia page.

For more information contact Kithsiri Jayasena, Plant Pathologist, Albany on +61 (0)8 9892 8477, Geoff Thomas, Plant Pathologist, South Perth on +61 (0)8 9368 3262 or Andrea Hills, Plant Pathologist, Esperance on +61 (0)8 9083 1144 or Ciara Beard, Plant Pathologist, Geraldton on +61 (0)8 9956 8504.

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