Downy Mildew Attacking Cucumbers



The rainy weather in many parts of the US this spring has caused an epidemic of downy mildew on cucumbers and other cucurbits.

Cucumbers are easy to grow and have few problems except for cucumber beetles which can be a serious pest. But in extremely moist environments downy mildew can be a problem.

Downy mildew is caused by a fungal organism Pseudoperonospora cubensis. It's not easy to control because the spores are carried by wind, or by infected garden tools and on the clothing of the gardener.

Downy mildew loves humidity so hot, dry days can be helpful. Downy mildew loves heavy dews, fog, and frequent rains.

Fungicide is the only known means of controlling downy mildew. Fortunately there are organic fungicides. One such fungicide is made from neem oil which is produced from a tree.

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Author: Marilyn Pokorney
Freelance writer of science, nature, animals and the environment.
Also loves crafts, gardening, and reading.
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