Q.Webworms
I have webworms on my sweetgum trees. Every day I have to go and sweep black stuff off my sidewalks that fell during the night from the trees. What is it and how long until it goes away?
Downtoearthdigs
Answered on September 28, 2016
The black residue is worm poo!
Here is a link on Webworm control.
https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-fall-webworms.htm
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