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Most of our squash plants have powdery mildew. How can we keep it from coming back?
Most of our squash plants have powdery mildew. How can we keep it from coming back?
Most of our squash plants have powdery mildew. How can we keep it from coming back?

Published on: 08/29/2026

This news was posted by Oregon Today News

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Powdery mildew is a common issue in the Willamette Valley, and on the coastal range of Oregon.

Q: How to treat powdery mildew on squash and cucumber plants? Most of our squash plants have powdery mildew. Some of the leaves have died and crumbled. We had same problem last year. I regret not removing all the infected plants before tilling the soil last year. How can we eradicate this mildew and keep it from coming back next year? I cut off some of the leaves, but felt it may be too big of a shock to the plant.

News Source : https://www.oregonlive.com/hg/2026/08/most-of-our-squash-plants-have-powdery-mildew-how-can-we-keep-it-from-coming-back.html

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