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What does powdery mildew look like?

What does powdery mildew look like?. How to use the agar tubes to collect samples. Collecting Powdery Mildew from the Field. Aim to harvest a nice green leaf, ideally with a single pustule. Using tweezers, insert infected sample approximately 1-2cm into the agar slope.

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What does powdery mildew look like?

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  1. What does powdery mildew look like?

  2. How to use the agar tubes to collect samples

  3. Collecting Powdery Mildew from the Field. Aim to harvest a nice green leaf, ideally with a single pustule. Using tweezers, insert infected sample approximately 1-2cm into the agar slope. Screw cap tight for shipping

  4. More information on powdery mildew

  5. Powdery mildew • Causal agent Blumeria graminis f.sp. hordei (Bgh) • Especially prominent in Southern WA • $33M yield loss per annum Millions of dollars loss annually Murray and Brennan 2010

  6. Bgh life cycle Mycelium and conidiophore formation Asexual Cycle Colonies produce conidia that are dispersed by wind Conidal germination and hyphal development Cleistothecia release ascospores Sexual Cycle Conidal deposition onto susceptible host Cleistothecia production after occurrence of two hyphae of opposite mating types

  7. Diseasecontrol Key: 1= very effective, 2=moderately effective, 3= not effective Jayasena et. al. 2008

  8. WA barley varieties

  9. Agronomic characteristics of malting and feed barley varieties when grown in Western Australia

  10. Disease resistance/ susceptibillity profiles of malting and feed barley varieties when grown in Western Australia

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