1. 2011 Cereal Rust Update - Western Australia ACRCP Meeting – March 2012 Manisha Shankar & Geoff Thomas

2. Wheat – Stripe rust: 3 reports only (Sep-Oct), minimal reports for last 4 years – Leaf rust: Several reports VS & S older variety types – Stem rust: Late widespread development Great Southern, South Eastern and Southern regions (Oct). Fungicides used. Primarily S types affected. Barley – Leaf rust: South and south coastal. Currently the most problematic rust disease on cereals in WA. Significant fungicide usage for powdery will have reduce BLR expression. Oat – Leaf and stem rust: reported from September onwards. Western Australia

3. 2012 Wheat Rust Disease Reports in Western Australia 2011 Wheat leaf rust2011 Wheat stripe rust 2011 Wheat stem rust

4. 2011 Barley leaf rust2011 Oat, stem and leaf rust date 2012 Barley and Oats Rust Disease Reports in Western Australia

5. Carnarvon - Disease establishment (4.9 hectares)  Planting  Outer and inner buffer runs planted by first week of April  Main planting - first week of May  1st Inoculation (last week of May)  Stem rust pathotypes 34-1,2,7+Sr38 and 98-1,2,3,5,6,7  2nd Inoculation (mid-June)  Leaf rust pathotype 104-1,2,3,(6),(7),11 +Lr37  Re-inoculation with both stem rust pathotypes  Good establishment of all three pathotypes by mid August  Trident: 60 - 70% leaf and stem rusts  Wyalkatchem: 80% stem rust

6.  Planting  Two buffer runs of Harrismith planted by third week of May  Main planting - third week of June  1st Inoculation (3 rd week of July): 134 E16 A+  2nd Inoculation (3 rd week of August)  Good establishment of stripe rust by 2nd week of October  Harrismith: 70-80% stripe rust  EGA Bonnie Rock: 70-80% stripe rust Manjimup - Disease establishment (~4 hectares)

7. Yitpi / stem rust found at mid booting? (Gibson 2011). DOS: 10 June. T1 =1 Sept (Z45). T2 = 23 Sept (Z61). 1 st visible symptoms on 31 Aug at Z45 Jayasena - DAFWA  $399 $111 $83 $63 $57

8. Folicur @ 290 mL/ha Sprayed at Z45 (1 Sept) & Z61 (23 Sept) Unsprayed Stem rust control on Yitpi wheat at Gibson 2011 Sprayed vs Unsprayed – Z90 (Jayasena, DAFWA)

9. SprayedUnsprayed T1&T2 F T1P T2 F UT T1Tx Late application of fungicides can reduced grain discolouration associated with saprophytic fungi on wheat at Gibson, Z90 (4 Nov 2011) Jayasena (DAFWA) Time 1 spray= T1 at Z45 (1 Sept) Time 2 spray =T2 at Z61 (23 Sept) F = Folicur @ 290 mL/ha P = Prosaro @ 300 mL/ha Tx = Tilt Xtra @ 500 mL/ha UT = Untreated

10. Above average rainfall through much of wheatbelt between Nov 2011-Jan 2012 raises spectre of green bridge carryover of rust inoculum. BOM rainfall outlook suggests continuing wetter than average, potentially supporting green regrowth and rust inoculum 2011-12 Seasonal Update Western Australia WA rainfall deciles 1 Nov 2011 – 31 Jan 2012 Chance of exceeding median rainfall Feb-April 2012