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Oilseed Rape Update on new RL varieties and disease management

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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  1. Oilseed RapeUpdate on new RL varieties and disease management Paul Gosling Research & KT Manager (Agronomy)

  2. Recommended list new additions for 2012

  3. Oilseed rape * The spring OSR list is descriptive

  4. Spring varieties New Yield

  5. Winter varieties

  6. Seasonal variation in oilseed rape E/W yields (controls & new) Average yield gain worth £140/ha based OSR @ £350/tonne

  7. Restored hybrid varieties New Resistance DK Expower contains the RLM7 resistance gene giving good resistance to Phoma

  8. Conventional varieties New Agronomy DK Camelot is an earlier maturing variety

  9. Semi-dwarf RH - East/West New Yield Agronomy Thorin is a high yielding semi dwarf variety with short stiff stems

  10. Clubroot resistant RH New Yield Resistance Cracker provides growers with a combination of light leaf spot resistance and clubroot resistance

  11. New information on disease management

  12. Clubroot RD-2007-3373 Management of clubroot (Plasmodiophora brassicae) in winter oilseed rape RD-2008-3525 Brassicas: Further Development of “in field” tests for resting spores of clubroot and the development of clubroot control based on detection Healthy Diseased

  13. Clubroot distribution RD-2007-3373 50% of Scottish samples 54% of English samples

  14. Effect on yield

  15. Clubroot persistence Modelled from Swedish data

  16. Field trial results - RD-2007-3373

  17. 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.

  18. Topic sheet

  19. Oilseed Rape 2012 and beyond • New RL varieties showing increased yield and improved agronomic characteristics • Watch for signs of clubroot - consider management options

  20. Thank you

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