What's your question? Ask

Hyacinth Plant

Q.Willow tree

Zone 37886 | Anonymous added on August 17, 2018 | Answered

I have a willow tree that has black sticky stuff falling from it. everything under it has turned black. It is full of bees also. I see no bugs but the leaves are covered with black too. I have the same tree a few feet from it that doesnt have this problem. What can it be?

A.Answers to this queston: Add Answer
Answered on August 18, 2018

It's probably aphids, a sucking insect pest that feeds on the sap and excretes a sticky "honeydew". Black "sooty mold" grows on the honeydew covered surfaces. The sooty mold is not harmful but the aphids can weaken the tree and cause branch die-back.

I suspect that the "bees" are not honey bees this time of year because a willow will not be in flower to attract pollinators. It is likely to be wasps/hornets feeding on the honeydew and maybe on the insect pest.

Without a photo or description of the size of the tree and growing conditions, it's hard to go any further with giving advise on control. A systemic insecticide would be best, to avoid having to spray a large tree with a contact insecticide.

The fastest acting and most effective systemic insecticides are available to professional applicators, like a tree service with a plant health care operation, or a landscape pest control company.

Was this answer useful?

Log in or sign up to help answer this question.

Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Hyacinth Plant
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert