June 24, 2017

Mary Hausbeck – Michigan State Commentary – Onion ipmPIPE

Michigan 07282013

  • The most significant problems were the bacterial diseases.

–          Bacterial leaf blight and bulb rot caused by Pantoea agglomerans was detected and confirmed using BIOLOG.

–          Two other types of symptoms were showing 1) the third leaf dead and 2) the newly emerging (center) leaf dead and/or interior rotting of the bulb part.

–          The two unidentified diseases and more bacterial leaf blight and bulb rot samples are being processed and identified.

  • Incidence of pink root and anthracnose has increased.
  • Other fungal diseases were not significant.
  • IYSV was still detected but with low incidence.
  • Thrips populations were low.