Revised Spring 2015
Quantify the risk, paddock by paddock
Blackleg is a sexually reproducing pathogen that will overcome cultivar resistance genes. Fungal spores are released from canola stubble and spread extensively via wind and rain splash. The disease is more severe in areas of intensive canola production.
Blackleg can cause severe yield loss, but can be successfully managed. Use this guide to determine whether you are in a high-risk situation and what practices you can change to reduce or prevent yield loss from blackleg. Follow the four steps, in sequence, outlined in this guide.
- Monitor your crops in Spring to determine yield losses in the current crop.
- Choose a cultivar with adequate blackleg resistance for your region.
- Never sow your canola crop into last year’s canola stubble.
- Relying only on fungicides to control blackleg poses a high risk of fungicide resistance.
- If your monitoring has identified yield loss and you have grown the same cultivar for three years or more, choose a cultivar from a different resistance group.
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National, North, South, West