White Mold On Crepe Myrtle - Knowledgebase Question

Joplin, MO
Question by tweisensee
June 29, 2000
My crepe myrtle bush has a white powdery mold on its leaves. What is it and what can I do to clear it up?

Answer from NGA
June 29, 2000


Unfortunately, your crepe myrtle is probably suffring from mildew, a fungal infection. Some varieties are more susceptible to it than others. You
may want to prune to remove the infected leaves, and to
open the canopy up to better air circulation. You must also
rake up and remove any fallen foliage as that will spread the
disease. Here is a good home remedy: Make a baking soda
solution and spray it onto the affected plants. To make this
solution mix 1 tablespoon of baking soda and 2 1/2
tablespoons of ultra-fine horticultural oil with a gallon of
water. The oil is slightly fungicidal and acts to help the
baking soda coat the leaf and hang on longer. Apply as a
spray as soon as the mildew appears and every 10-14 days
thereafter. Be sure to coat all surfaces!

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