Acorn Squash and Powdery Mildew

Acorn squash leaves with powdery mildewAcorn squash, mildewed leaves removedTo my dismay, my one acorn squash plant has developed powery mildew. It’s a fungus that affects squashes and other plants. Since I get home in the early evening, I water my plants at that time. For the acorn squash, that was a bad decision, since the cool evening air likely made water evaporation on the plant very slow, increasing the chances for powdery mildew.

TIP: For the remainder of its life, I’ll water this plant in the morning, away from remaining leaves, to reduce further mildew build-up. I’ll keep my eye out on surrounding plants for signs of mildew problems, but so far, so good. In the meantime, to treat the problem,  I cut off the affected leaves. I’ll know and do better next season!

It has a few healthy leaves left, so hopefully that’ll be enough to help nourish the small green acorn squashes-to-be in the top center of the photo. I also have the very large acorn squash that is nearly ready to pick!

I’ve included a photo of the powdery mildew covered leaves in case there was curiosity about what this looks like.

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2 Responses

  1. try spraying with milk diluted with water 50%, you can add a little liquid seaweed to this.

  2. Dear Mike – many thanks for this suggestion. I will try it, and hopefully will have more squashes to enjoy. Thank you for visiting my blog!

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