Michigan Cucurbit update | August 9, 2023

Cucurbits & Pickles report

  • Good yields of yellow and green processing zucchini were being harvested in west central Michigan.
  • Watermelon harvest continues in the state.
  • Cucurbit downy mildew has been confirmed in eight counties to date.
  • Clade-2 Downy mildew spores were captured in Michigan.
  • Clade-1 has been reported on pumpkins in northern Ohio.
  • Phytophthora continues to be detected. Sources of infection include rain events and irrigation.

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young squash plants in field

Phytophthora in a young, transplanted squash field taking out runs of plants along the row. Photo by Ben Phillips, MSU Extension.