Oilseed rape update on new rl varieties and disease management
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Oilseed Rape Update on new RL varieties and disease management PowerPoint PPT Presentation

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Oilseed Rape Update on new RL varieties and disease management. Paul Gosling Research & KT Manager (Agronomy). Recommended list new additions for 2012. Oilseed rape. * The spring OSR list is descriptive. Spring varieties. New. Yield. Winter varieties.

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Oilseed Rape Update on new RL varieties and disease management

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Oilseed RapeUpdate on new RL varieties and disease management

Paul Gosling

Research & KT Manager (Agronomy)

Recommended list new additions for 2012

Oilseed rape

* The spring OSR list is descriptive

Spring varieties



Winter varieties

Seasonal variation in oilseed rape E/W yields (controls & new)

Average yield gain worth £140/ha based OSR @ £350/tonne

Restored hybrid varieties



DK Expower contains the RLM7 resistance gene giving good resistance to Phoma

Conventional varieties



DK Camelot is an earlier maturing variety

Semi-dwarf RH - East/West




Thorin is a high yielding semi dwarf variety with short stiff stems

Clubroot resistant RH




Cracker provides growers with a combination of light leaf spot resistance and clubroot resistance

New information on disease management



Management of clubroot (Plasmodiophora brassicae)

in winter oilseed rape


Brassicas: Further Development of “in field” tests for resting spores of clubroot and the development of clubroot control based on detection



Clubroot distribution


50% of Scottish samples

54% of English samples

Effect on yield

Clubroot persistence

Modelled from Swedish data

Field trial results - RD-2007-3373

Project conclusions

  • Clubroot can cause significant yield loses in OSR even crop failure.

  • Neither varietal resistance or soil amendments offer complete and reliable control.

  • The risks of clubroot increase when brassicas are grown in short rotations (less than 1 in 5?)

  • Preventative action with lime will be beneficial in managing this disease where pressure is low.

  • Varietal resistance is likely to be very successful initially but will be eroded in short rotations.

Topic sheet

Oilseed Rape 2012 and beyond

  • New RL varieties showing increased yield and improved agronomic characteristics

  • Watch for signs of clubroot - consider management options

Thank you

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