University of California
Urban and Community Integrated Pest Management
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A sticky mess
![Hackberry woolly aphids. [Credit: Jack Kelly Clark]](http://ucanr.edu/blogs/CCUrbanPests//blogfiles/55422small.jpg "Hackberry woolly aphids. [Credit: Jack Kelly Clark]")
Around this same time last year, I posted an article called "What's this sticky stuff on my car?". Well, it's that time of year again when we see the sticky, messy drippings from many different kinds of trees that are infested with a honeydew-producing...
![Hackberry woolly aphids. [Credit: Jack Kelly Clark]](https://ucanr.edu/blogs/CCUrbanPests/blogfiles/55422.jpg)
Hackberry woolly aphids. [Credit: Jack Kelly Clark]
