When the aphids are gone, the mold (which grows on their excretions)
will eventually dry up and fall off. To get rid of both, you can use
this:

1/3 cup Murphy's Oil Soap
1 tablespoon baking soda (this kills the mold)
1 gallon of water.

BE SURE to spray in early evening or early morning, when it is cool.
Otherwise, the oil will damage the plants.


Latosha Washington wrote:
I have aphids on my crepe myrtles and they put out that black tar type
stuff. Although the plants are healthy, the blooms/flowers are limited
severely by these things.

I've sprayed with neem twice but they are still there.

Any good ideas?