Oilseed rape update on new rl varieties and disease management
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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 rape update on new rl varieties and disease management

Oilseed RapeUpdate on new RL varieties and disease management

Paul Gosling

Research & KT Manager (Agronomy)


Oilseed rape update on new rl varieties and disease management

Recommended list new additions for 2012


Oilseed rape update on new rl varieties and disease management

Oilseed rape

* The spring OSR list is descriptive


Spring varieties

Spring varieties

New

Yield


Oilseed rape update on new rl varieties and disease management

Winter varieties


Seasonal variation in oilseed rape e w yields controls new

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

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


Restored hybrid varieties

Restored hybrid varieties

New

Resistance

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


Conventional varieties

Conventional varieties

New

Agronomy

DK Camelot is an earlier maturing variety


Semi dwarf rh east west

Semi-dwarf RH - East/West

New

Yield

Agronomy

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


Clubroot resistant rh

Clubroot resistant RH

New

Yield

Resistance

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


Oilseed rape update on new rl varieties and disease management

New information on disease management


Clubroot

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


Clubroot distribution

Clubroot distribution

RD-2007-3373

50% of Scottish samples

54% of English samples


Effect on yield

Effect on yield


Clubroot persistence

Clubroot persistence

Modelled from Swedish data


Field trial results rd 2007 3373

Field trial results - RD-2007-3373


Project conclusions

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

Topic sheet


Oilseed rape 2012 and beyond

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

Thank you


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