Potato Research

, Volume 38, Issue 1, pp 23–29 | Cite as

Incidence of the A2 mating type ofPhytophthora infestans on potato crops in Northern Ireland

  • Louise R. Cooke
  • Rhonda E. Swan
  • T. S. Currie


Of 250 isolates ofPhytophthora infestans obtained from Northern Ireland potato crops between 1981 and 1993, only six proved to be of the A2 mating type, the remainder being A1. The first A2 isolate was obtained from a tuber in 1987. The frequency of A2 isolates from 1987 onwards was 3%, a lower incidence than has been reported for England and Wales and the Republic of Ireland. There was no association between phenylamide resistance and mating type.

Additional keywords

potato late blight phenylamide resistance 


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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Louise R. Cooke
    • 1
    • 2
  • Rhonda E. Swan
    • 1
  • T. S. Currie
    • 1
  1. 1.Applied Plant Science Research DivisionDepartment of Agriculture for Northern IrelandBelfastUK
  2. 2.Department of Applied Plant ScienceThe Queen's University of BelfastBelfastUK

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