Powdery mildew on cucurbit leaves

Powdery Mildew Prevention I: Garden Design & Climate Control

How Garden Design & Climate Control Can Help Prevent Powdery Mildew

So the background check into powdery mildew spores confirms that they can be a habitual offender, a persistent pain in the ass. If your plants have ever been afflicted, then you know PM is a menace. What makes PM a phantom menace? Standard definitions of ‘phantom’ suggest something unreal, like a ghost. That obviously doesn’t apply here. Ask any gardener who has dealt with PM: it’s all too real. Ask that same person how they feel about PM and they may well touch on other definitions of phantom: something hated, feared, or deceptive.

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