Crepe Myrtle with Powdery Mildew

Asked July 9, 2017, 3:08 PM EDT

Is there any solution for getting rid of the powdery mildew on my crepe myrtle? I read in The Sun the best solution is to cut it down and plant a new crepe myrtle. What do you think?

Baltimore County Maryland powdery mildew crape myrtle shrub

1 Response

This fungal disease is usually not lethal to crape myrtles but is certainly not attractive. http://extension.umd.edu/hgic/powdery-mildew-trees-and-shrubs

Control begins by selecting powdery mildew resistant varieties and you should consider for the future. You will have to decide.

Make sure the plant is in full sun and good air circulation to reduce humidity levels and allow proper plant spacing. Pruning for better air circulation also may help.
If severe, you can spray as soon as you notice the mildew. Check the label registration on fungicides for control information and timing. Fungicide treatments can help to protect new or un-infected foliage they are not curatives. It is up to you if you want to spray. You can monitor the situation this year.

Look at the list from the National Arboretum for more information on resistant varieties http://www.usna.usda.gov/Gardens/faqs/crapemyrtlefaq2.html#How%20hardy%20are
and Clemson http://www.clemson.edu/extension/hgic/pests/plant_pests/trees/hgic2002.html
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