Understanding risks of severe phoma stem canker caused by Leptosphaeria biglobosa on winter oilseed rape in the UK

Project number 21120036

Lead partner University of Hertfordshire

Industry partners DuPont

Start date April 2015

End date March 2019

Total funding £120,000 

The challenge

Phoma stem canker is caused by two pathogens in the UK: Leptosphaeria maculans and L. biglobosa. L. maculans is, generally, the more damaging of the two but there is a need to know more about the biology and control of L. biglobosa. In addition, there is a need to determine the relative distribution of these two pathogens in the UK so fungicides and resistant cultivars can be deployed more effectively.

The project

Under four objectives, the project will:

1. Assess regional differences in proportions of L. biglobosa and L. maculans

2. Investigate cultivar resistance against L. biglobosa

3. Determine fungicide sensitivity of L. biglobosa compared to L. maculans

4. Revise phoma stem canker management guidance  

The benefits

Better knowledge of the control of L. biglobosa using fungicides and resistant cultivars will aid management decisions to improve control of phoma stem canker. Mapping the distribution of L. biglobosa and L. maculans will allow fungicide recommendations to be made and resistant varieties to be used which are appropriate to the region. Information on timing of ascospore release will help people to better time fungicide applications in the autumn. 


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