White cobwebs covering marigolds
About a week ago, I noticed that one of my marigolds in my garden was slightly covered in a white cobweb. I didn't think much of it until now. It looks like the entire plant is dead and brown and the cobweb like covering is thicker and has encased the entire plant and has now gotten onto my eggplant. What is it and how do I kill whatever bug is doing it??? Please HELP!!!