Disease on squash plants

Asked July 31, 2020, 9:06 PM EDT

Hi, This just started showing on my squash plants this week and it has now spread across to all of my squash. What is it and what can I do to prevent it from spreading further and damaging my squash? Thank you!

St. Louis County Minnesota

1 Response

Thank you for writing.
This is powdery mildew. https://www.thespruce.com/powdery-mildew-1402500
Given the extent of the disease and how close we are to harvest, use topical agents.
For future note, it helps to water from the bottom because splash up of fungi from an overhead sprinkler can be a problem.