Crape Myrtle Trees

Why Are the Leaves on Our Crepe Myrtle Turning Yellow and Falling Off?

Hoover015 added on July 28, 2012 | Answered

We have 6 of the myrtles (3 on each side of the driveway), not all the same variety. We have noticed a curious "sap" falling on the cars this year that we have never had before. Now the leaves on some are yellowing and falling off. What could be causing this?

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Certified GKH Gardening Expert
Answered on July 30, 2012

Crepe myrtles normally don't drop sap, so this is likely honeydew from a pest infestation. The most common is aphids. I would treat the tree with neem oil. This will kill the pests without harming people, pets or beneficial bugs. Here is more information:

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