Mildew on my cucumber and squash

Asked June 7, 2015, 4:22 PM EDT

I have a squash and a cucumber that looked healthy when I bought them last week, however they now have what I think is powdery mildew on some of the leaves. Should I plant them in my garden with this affliction? I have no other cucumbers or squats plants planted there.

Frederick County Maryland

1 Response

Squash and cucumber can be susceptible to powdery mildew. However, squash foliage can have a natural color/veining pattern and may be mistaken for powdery mildew. View photos on Google of squash foliage.
You can treat the transplants with horticultural oil labeled for powdery mildew and follow directions. If the plants look really bad, it is not too late to start squash and cucumber from seed.
See our website on powdery mildew http://extension.umd.edu/growit/powdery-mildew-vegetables
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