Managing Red Leather Leaf Disease and Preventing Weather Damage in Oats

GRDC - Author: Mark McLean and Hari Dadu (Agriculture Victoria)

Type: Research Paper
Knowledge level: Advanced

Farm Table says:

The authors of this paper note in the conclusion: “There are no fungicides registered for control of RLL, however there are products registered for other diseases in oats. We found that fungicides suppress RLL but do not provide complete control. Foliar fungicide applications at Z25 and Z31 were most effective as they coincide with early disease development, while application at Z39 can provide benefits during seasons with wet springs.”. Please access the full paper via the link below if this research interests you.

The take home messages from this GRDC  funded research are below. Please access the full paper via the link below for methodology, references, acknowledgements and discussion.

  • Red leather leaf (RLL) is a common foliar disease that causes yield losses in milling and hay oats in the medium and high rainfall zones of Victoria.
  • Avoiding planting of very susceptible rated varieties significantly reduces losses.
  • Foliar fungicide applied at mid tillering (Z25) and early stem elongation (Z31) provided the best suppression of RLL.
  • Foliar fungicide application also provided suppression of fungal saprophytes and reduced hay discolouration post hay cutting.

Table 4. Visual estimate of percentage colonisation by saprophytes and mould colony units on oaten hay 40 days after cutting.

2020 - Australia - GRDC - Author: Mark McLean and Hari Dadu (Agriculture Victoria)
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