Why are the leaves on our crepe myrtle turning yellow and falling off?

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?

1 Comment (Open | Close)

1 Comment To "Why are the leaves on our crepe myrtle turning yellow and falling off?"

#1 Comment By Nikki On 07/30/2012 @ 6:46 am

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:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm ^[1]

Article printed from Gardening Know How Questions & Answers: https://questions.gardeningknowhow.com

URL to article: https://questions.gardeningknowhow.com/why-are-the-leaves-on-our-crepe-myrtle-turning-yellow-and-falling-off/

URLs in this post:

[1] https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

Have any questions about this topic? Visit us at https://questions.gardeningknowhow.com to ask your questions and get friendly answers from gardening experts.

You can also find us at:
'Like' us on Facebook: https://www.facebook.com/gardeningknowhow
Follow us on Twitter: https://twitter.com/gardenknowhow - @gardenknowhow
Follow us on Pinterest: https://pinterest.com/gardenknowhow/