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Clubroot is the most serious soilborne disease affecting brassicas world wide.
Clubroot is caused by Plasmodiophora brassicae Woronin, an obligate biotrophic parasite.
Australian crop losses are estimated at between 5 and 10% of production.
Clubroot is endemic in most of the major production regions of Victoria, New South Wales and
Tasmania.
FACT : Clubroot management is based on understanding disease risk
Authors
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Caroline Donald
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Ian Porter
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Josie Lawrence
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Barbara Czernaikowski
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Rachel Lancaster
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Dean Metcalf
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Leigh James
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Peter Stephens
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Shane Dullahide
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Estimating risk:
Disease severity is related to levels of Clubroot in the soil.
Disease risk can be estimated using farm records or by a molecular diagnostic test.
Have you ever seen clubroot on your property?
How large is the area affected?
| 1. |
Severity of last observed clubroot infection |
| 2. |
Time since last observed clubroot infection |
| 3. |
Intended sowing time for brassicas |
| 4. |
Have brassica weeds been seen on the site since last infection |
| 5. |
Intended crop |
| 6. |
Soil pH |
| 7. |
Source of planting material |
| 8. |
Variety |
| 9. |
Drainage |
| 10. |
Soil type |
Acknowlegements:
Financial support for this research has been provided by: Horticulture Australia Limited, the vegetable
growers R&D levy and Stae Departments of Agriculture.
Thanks to the following growers for their assistance with trial work:
| Con Ballan |
Geoff Cochrane |
Anthony Mason |
| David Milburn |
George Sabo |
Tony Wright |
| Sam Calameri |
Tom Winfield |
Andrew Doran |
| Mark Kable |
Kevin Temple |
Rod
Sherriff |
| Michael Camenzuli |
WU Yue Fang, |
ZHONE Cai Xia |
| Ha Sau Ying |
XIANG Cai Ji |
Robert Quirks |
| Dario Semenzin |
Harslett farms |
Greg Widderick |
Thanks to the following for their technical assistance on the project:
| Josie Lawrence |
Barbara
Czernaikowski |
| David Tooke |
Lisa Gibson |
| Jenny McGough |
Christina Bakker |
| Chang You Pan |
Kevin Lai |
| Alison Anderson |
Glenn Geitz |
| R. Palmer |
Kathy
McLachan |
| David Richard |
Duncan Cameron |
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C. Haase
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Statistical advice by Fiona Thomson and Nam Ky Nguyen (Department of Primary Industries, Vic).
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