Wheat disease update
Wheat leaf rust
Plant pathologist Kith Jayasena (DPIRD) reports finding wheat leaf rust on Mace wheat near Woogenellup. The crop had Jockey seed dressing and one application of Folicur. It was going to be sprayed as soon as weather permitted.
For more information on managing wheat leaf rust later in the season refer to the 2017 PestFax Issue 22 article More leaf rust found in several wheat varieties up north.
Wheat powdery mildew
- South Stirling
King yin Lui (Curtin) reports finding wheat powdery mildew (WPM) in Corack wheat near York. The crop was at milk development.
Plant pathologist Kith Jayasena (DPIRD) reports that WPM is present in Scepter wheat near Woogenellup. The crop had Jockey seed dressing and one application of Folicur. It was going to be sprayed as soon as weather permitted.
Kith also reports that WPM on Scepter wheat has been seen at South Stirling and was going to be sprayed with Propiconazole.
Scepter and Corack are both rated susceptible to very susceptible (SVS) to powdery mildew. Therefore under favourable weather conditions infection could multiply rapidly in both varieties.
For more information on wheat powdery mildew refer to the department’s Managing powdery mildew in wheat page.
Fungicide application information
Fungicide choice needs to take into account the diseases present in 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 more 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.